Specification
TECHNICAL FIELD
The present invention generally relates to a device and method for measurement of
electrical properties of electro-conductive fabrics. The present invention more
particularly relates to an all-in-one device for measuring electrical properties of
electro-conductive fabrics under varied test conditions. Further, the present invention
also relates to automatic measurement of electrical properties at different places of
the fabric, without any human interference.
B) BACKGROUND OF THE INVENTION
The electro-conductive textiles may find applications in the areas of electromagnetic
shielding, gas sensing, electrostatic dissipation, particle filtration, dust and germ free
clothing, data transfer in clothing, military applications such as camouflage and
stealth technology, etc. The electrical conductivity or resistivity is one of the key
properties of such products. However, the measurement of electrical conductivity or
resistivity of textile products is very complex. As known, the textile products are
flexible and compressible and they possess non-uniform surface, making the
measurements very difficult. Such measurements are therefore quite challenging.
A few attempts were made in the past to measure the electrical properties of electroconductive
fabrics. Bera et al. (2014) reported a method for measurement of
electrical impedance of fabrics by spectroscopy analysis. The device used by them
measured the impedance (not resistance or resistivity) of the fabrics. As mentioned in
the article, the authors of this work applied different weights (by hands) onto the
fabrics and measured their impedances for determination of compression-induced
impedance of the fabrics. Clearly, a significant amount of human interference was
involved in the measurements.
Further, it goes beyond saying that these measurements should be automated and
the tests area should be selected randomly, preferably without any human
interference. However, there is no such equipment or device which is commercially
available today.
Rebouillat and Lyons (2011) reported a method for measurement of conductivity of
single electro-conductive fiber, but no equipment or device was reported for
measuring electrical properties of electro-conductive fabrics under varied test
conditions.
Further, the measurement of surface resistivity, which is generally carried out by
using a ring-disc type two probe electrode system in accordance with ASTM D257
standard, is often questionable. During this measurement, an arbitrarily chosen
pressure is applied onto the fabrics to achieve proper contact between the fabrics
and the electrodes. The pressure remains same for all kinds of fabrics. Nevertheless,
the fabrics made up of different fibers and having different constructions are expected
to exhibit different degrees of contact under the application of varying pressure,
r t P i . ^ i f h ' ^i4urrE>w?0-uldj ghfv^differpnt levlls of electro-conductivity. It is therefore
2
necessary to exert an appropriate amount of pressure onto a given fabric. This
pressure may be different for different fabrics, depending on the nature of the
constituent fibres used and the characteristics of the technologies employed to
produce such fabrics.
In view of the foregoing, there is a need to provide a device or equipment which
would incorporate necessary modules for measurement of electrical properties of
electro-conductive fabrics under optimum pressure for making fair comparisons
among the fabrics.
The above mentioned shortcomings, disadvantages and problems are addressed
herein, which will be understood by reading the following specification.
C) OBJECTIVES OF THE INVENTION
The primary objective of the present invention is to provide a device or equipment for
automatic measurement of electrical properties of electro-conductive fabrics
according to an embodiment of the present invention.
Another objective of the present invention is to provide a device or equipment to
measure the surface as well as volume resistivity of the conductive fabrics under
different conditions such as relative humidity, temperature, time duration, and
pressure applied onto the fabrics according to an embodiment of the present
invention.
It is yet another objective of the present invention to provide a device or equipment to
measure the electrical properties of electro-conductive fabrics without any human
intervention process according to an embodiment of the present invention.
These and other objectives and advantages of the present invention will become
readily apparent from the following detailed description taken in conjunction with the
accompanying drawings.
D) SUMMARY OF THE INVENTION
The various embodiments of the present invention provide a device for measuring
electrical properties of electro-conductive fabrics, the device comprising an electrode
assembly, a temperature sensor, at least one or more measurement platform, at least
one or more tray to hold different chemicals or hygroscopic agents, at least one or
more heating elements, at least one or more regulated air producing element such as
fan, a control panel, a regulated direct current power supply means and a computing
device connected to the components of the device for measuring electrical properties
of an electro-conductive fabric to automate the process; wherein, the test samples of
the electro conductive fabric whose electrical characteristics are to be measured are
placed on the measurement platform and moved along the x-axis and y-axis
directions randomly and further the electrode assembly which is attached to a
pressure applying and controlling unit imparts a predefined pressure onto the fabric
test sample, thereby allowing the measurement of the electrical properties of an
3
1
electro-conductive fabric sample.
According to an embodiment of the present invention, the electrode assembly is a
servo motor controlled assembly that has been mounted outside the fabric sample
testing chamber and is controlled by a microprocessor. The pressure at the contact
point between the electrode of the electrode assembly and the fabric to be tested is a
customized value and it is provided through the control panel or through the
computing device as an input to the test fabric. The customized value determines the
amount of pressure to be put over the fabric, decides the test area randomly and
governs the amount of electricity to be passed through the test fabric to determine
the electrical properties of fabric sample. Further, the electrode assembly employed
herein for the measurement of electrical properties of electro-conductive fabrics is of
at least a concentric ring-disc electrode configuration.
According to an embodiment of the present invention, the measurement platform is
divided into at least four quadrants for the measurement of surface resistivity, volume
resistivity and voltage-temperature characteristics. The first two quadrants are used
to measure surface resistivity, the third quadrant is used to measure the volume
resistivity and the fourth quadrant is used to measure the voltage-temperature
characteristics of the electro-conductive fabrics under test. Further, the voltagecurrent
characteristics of the electro-conductive fabrics are measured in the first and
the second quadrants of the measurement platform and the measurement platform is
an x-axis and y-axis movable platform which allows the electrode to select a random
test point on the electro-conductive fabrics.
According to an embodiment of the present invention, a temperature sensor is at
least an infrared sensor mounted inside the test chamber which provides constant
data to the computing system or to the control system with the information relating to
the change in temperature of the electro conductive fabric kept inside the test
chamber and the test chamber comprises of one or more trays to hold different
chemicals or hygroscopic agents in order to control the relative humidity within the
test chamber.
According to an embodiment of the present invention, one or more heating elements
are mounted inside the test chamber to control the temperature inside the test
chamber and at least one or more regulated air producing elements such as fan are
mounted inside the test chamber to circulate the air and maintain the uniform climate
inside the chamber.
According to an embodiment of the present invention, the control panel receives the
input settings and provides it to the inbuilt microprocessor such that the
microprocessor regulates the use of air producing elements such as fan and the
heating elements for maintaining a uniform temperature and humidity atmosphere
within the test chamber and the power supply system also comprises of current and
.vpJ|age>n^asU:j;igg_deyiG|es and tlpejpowgrsfupply system provides the required power
4
distribution to the test chamber and its associated components to measure the
characteristics of the electro-conductive fabrics.
According to an embodiment of the present invention, the power supply system was
controlled by software installed in the computing system such that it was possible to
define the voltage range applied onto the test fabric and the current flowing through
was measured and recorded automatically and the computing device was
configurable to receive inputs from a remote location on a computer network through
another computing device on another computer network and provided those inputs to
the device for measuring electrical properties of electro-conductive fabrics and
performed the required test based on the received input test data over the test fabric
and transmitted back the changes or test outcomes recorded in the test chamber with
the test results to the remote location. Further, the computing device can be
configured to record the voltage-current and voltage-temperature profiles at random
locations on the electro-conductive fabrics kept in the test chamber.
According to an embodiment of the present invention, the computing device can be
configurable to integrate an image capturing and live video relay device such as a
web-camera to remotely monitor the condition of the fabric under test in the test
chamber. Further, a resistance measuring system can be configured to record the
change in resistance, if any, over a period time under voltages applied to the test
fabric.
These and other aspects of the embodiments herein will be better appreciated and
understood when considered in conjunction with the following description and the
accompanying drawings. It should be understood, however, that the following
descriptions, while indicating preferred embodiments and numerous specific details
thereof, are given by way of illustration and not of limitation. Many changes and
modifications may be made within the scope of the embodiments herein without
departing from the spirit thereof, and the embodiments herein include all such
modifications.
BRIEF DESCRIPTION OF THE DRAWINGS
The other objects, features and advantages will occur to those skilled in the craft from
the following description of the preferred embodiment and the accompanying
drawings in which:
FIG.1 depicts the components of the device for measuring electrical properties of the
electro-conductive fabrics according to an embodiment of the present invention.
FIG. 2 depicts the device and its other related parts of the device used for measuring
electrical properties of the electro-conductive fabrics according to an embodiment of
the present invention.
FIG. 3 depicts the graph data depicting the plot of effect of test duration on electrical
resistance according to an embodiment of the present invention.
5
FIG. 4 depicts the graph data depicting the plot of effect of electrode pressure on
electrical resistance according to an embodiment of the present invention.
FIG. 5 depicts the graph data depicting the plot of effect of temperature on electrical
resistance of electro-conductive fabric according to an embodiment of the present
invention.
FIG. 6 depicts the graph data depicting the plot of effect of voltage on current flow of
electro-conductive fabric according to an embodiment of the present invention.
FIG. 7 depicts the graph data depicting the plot of effect of voltage on temperature of
electro-conductive fabric according to an embodiment of the present invention.
Although specific features of the present invention are shown in some drawings and
not in others. This is done for convenience only as each feature may be combined
with any or all of the other features in accordance with the present invention.
F) DETAILED DESCRIPTION OF THE INVENTION
In the following detailed description, reference is made to the accompanying
drawings that form a part hereof, and in which the specific embodiments that may be
practiced is shown by way of illustration. These embodiments are described in
sufficient detail to enable those skilled in the craft to practice the embodiments and it
is to be understood that the logical, mechanical and other changes may be made
without departing from the scope of the embodiments. The following detailed
description is therefore not to be taken in a limiting sense.
The various embodiments of the present invention provide an electro-conductive
testing device for measuring electrical properties of electro-conductive fabrics, the
device comprising an electrode assembly a temperature sensor, at least one or more
measurement platform, at least one or more tray to hold the chemicals or
hygroscopic agents, at least one or more heating elements, at least one or more
regulated air producing elements such as fan, a control panel, a regulated direct
current power supply system and a computing device connected to the components
of the device for measuring electrical properties of an electro-conductive fabrics to
automate the process; wherein, the test samples of the electro conductive fabrics
whose electrical characteristics are to be measured are placed on the measurement
platform and moved along the x-axis and y-axis directions randomly and further the
electrode assembly which is attached to a pressure applying and controlling unit
imparts a predefined pressure onto the fabric test sample thereby allowing the
measurement of the electrical properties of an electro-conductive fabric sample.
The electro-conductive testing device for measuring electrical properties of an
electro-conductive fabrics described in the present invention is an all-in-one device
for measuring a set of electrical properties of electro-conductive fabrics under varied
test conditions. The electro-conductive testing device measures the surface resistivity
as well as the volume resistivity of the conductive fabrics under different or varied
conditions such as relative humidity, temperature, time duration, and pressure
=.*- . .appliecLonto taeJabrics=«The-ele©tr-e-GOBdactive testing device can also be configured
6
to determine the voltage-current and voltage-temperature characteristics of the
electro-conductive fabrics. The measurements can be performed automatically on
different places of the fabric randomly without any human interference. As the
measurement system is interfaced to a computing system it is possible to obtain and
analyze the measured data stored in these computing devices. The recorded data by
the computing systems can also be accessed remotely with the help of internet
connection and a web camera integrated into the electro-conductive testing device.
According to the embodiment, the components of the electro-conductive testing
device were assembled in the top chamber. These components basically comprised
but were not limited to a measurement platform which was capable of performing xaxis
and y-axis movements as governed by random selection of the coordinates of
the test area, an electrode assembly with pressure control for selecting and
determining the optimum pressure, a surface temperature measuring device for
monitoring any change of temperature, a power supply and current and voltage
measuring devices and a environment control system for maintaining uniform
temperature and humidity within the chamber.
The control panel, the video camera and the computing device were placed outside
the chamber due to the reason such as high humidity and power risk factors. The
main platform had four quadrants, namely for measurement of surface resistivity,
volume resistivity and voltage-temperature characteristics. The voltage-current
characteristics could be measured in the first two quadrants. Further, the electrode
assembly used herein is of concentric ring-disc electrode configuration and the test
area within the three quadrants was randomly selected once the numbers of readings
were defined, and the data were recorded.
The electrode assembly was attached to a pressure applying and controlling unit
which could impart a predefined pressure onto the fabric test samples. This
essentially was a servo motor controlled assembly that was mounted outside the test
chamber as the microprocessor controls were expected to be affected from the
humidity inside the chamber. The heating system was integrated to control the
temperature inside the chamber. The fan was used to circulate the air and maintain
the uniform climate inside the chamber and a pair of trays was used to keep
saturated solutions of different chemicals or hygroscopic agents in order to control
the relative humidity within the chamber.
To measure the surface temperature of the fabric sample an infra-red sensor was
fixed inside the test chamber. The infra-red sensor was used to measure the changes
in temperature of the test sample as a result of current flowing through it. The
resistance measuring system was connected to the computer and could also record
the change in resistance, if any, over a period time under applied voltage. The power
supply unit was controlled by software such that it was possible to define the voltage
range applied onto the fabric and the current flowing through was measured and
HIE' 2' 4- - 0-S*- Z S I 5- i 7 * S 5-
7
recorded automatically. The mechanical, electrical and electronic parts of the
instrument were capable of withstanding temperature (0°C - 50°C) and relative
humidity (1 % - 99 %).
The electro-conductive fabrics were secured tightly on the platform by insulated
clamps according to the test intended. The specimen size was kept at 10 cm * 10 cm
for all the tests and the pressure of contact between the electrode and the fabric was
fixed as desired. The measuring conditions were set in to the computing device prior
to testing.
Further, the electro-conductive testing device could measure electrical resistivity,
ranging from a few uhms to several mega-bhms, of fabrics under different conditions
such as relative humidity, temperature, for different time durations, and applied
electrode pressure. It is also possible to record the voltage-current and voltagetemperature
profiles of the electro-conductive fabrics. The measurements could also
be performed automatically at random places, without any human interference. The
measurement system was interfaced to a computing device and thus it was possible
to obtain and analyze the measured data stored in the computer. This further could
also be accessed remotely via internet connection remotely. The movement of the
stage (platform) could also be seen at the remote location by interfacing the web
camera with the electro-conductive testing device.
FIG.1 depicts the components of the device for measuring electrical properties of the
electro-conductive fabrics according to an embodiment of the present invention.
According to the embodiment, the device or the equipment for measurement of
resistivity of the fabric samples comprised a complete machine (a) connected to a
software display (b) system and has a measuring platform (c) for providing the base
to receive the fabric to be tested. The electro-conductive fabrics were secured tightly
on the measuring platform by insulated clamps according to the test intended and the
specimen size was kept at 10 cm x 10 cm for all the tests. Further, the pressure of
contact between the electrode and the fabric was fixed as desired by providing
certain inputs to the software display system (b) present on the computing system.
These measuring conditions were set in to the computing device prior to testing.
FIG. 2 depicts the device and its other related parts of the device used for measuring
electrical properties of the electro-conductive fabrics according to an embodiment of
the present invention device for measuring electrical properties or the resistivity of the
electro-conductive fabrics comprises of an electrode assembly 1, a temperature
sensor, a measurement platform 3 in which there exits 4 quadrants, The first
quadrant was used for a resistivity measurement without conducting bottom plate 3a.
Further, the second quadrant resistivity measurement with conducting bottom plate
was 3b. The voltage-temperature characteristic measurement 3c was the third
quadrant and volume resistivity measurement 3d was in the fourth quadrant. The test
chamber basically comprised of one or more trays ray for placing chemicals 4. These
«, _ _ . chemicals-or the-hygroscQpi& agents wejerfjsed to control the relative humidity within
8
the chamber. The Heating element 5 was integrated to control the temperature inside
the test chamber. A Fan 6 was used to circulate the air and maintain the uniform
climate inside the chamber. The Control panel 7 was basically a environment control
system for maintaining uniform temperature and humidity within the chamber. The
control panel 7 basically received input from the user or from the computer to activate
or deactivate certain actions pertaining to the test chamber. The regulated DC power
supplies 8 provided the relevant power requirements for the device to power up and
operate. The computing system 9 was basically used as an interface to receive user
inputs and provide these inputs to the test chamber. Further the computing device is
configured to receive one more output data from the test chamber and store it for
further analysis. It has to be noted that by integrating a web camera or similar such
device tn the electro-conductive testing device it was possible to monitor the test
fabric remotely and read the data values remotely.
FIG. 3 depicts the graph data depicting the plot of effect of test duration on electrical
resistance according to an embodiment of the present invention. According to the
embodiment, it can be observed that the electrical resistance of the fabrics was
almost constant, irrespective of their level of resistance. The readings therefore, can
be recorded as soon as one wishes, may be at 30 s after the start of the test for
these samples as there is inertial period. This test can give us the idea whether the
sample is stable in this respect
FIG. 4 depicts the graph data depicting the plot of effect of electrode pressure on
electrical resistance according to an embodiment of the present invention. According
to the embodiment, a set of two electro-conductive fabrics were chosen and their
electrical resistance was measured at different levels of compression and the results
are depicted here. It can be observed that both Fabric A and Fabric B showed a
decrease in electrical resistance before leveling off. Interestingly, Fabric A showed
almost no change in electrical resistance beyond the compressive pressure of 25
kPa, while Fabric B showed no change in electrical resistance beyond the
compressive pressure of 40 kPa. If these two fabrics were required to be compared
for their electrical resistance then the measurements of electrical resistance should
be conducted at a compressive pressure of 25 kPa or higher in the case of Fabric A
and 40 kPa or higher in the case of Fabric B. It was therefore concluded that the
optimum load for measuring surface resistance for different fabrics would be different
and so the measurements should only be done at this pressure. This could be easily
done with the designed equipment. Moreover, it is suggested that the testing
standards for the measurements of resistivity should be modified accordingly.
FIG. 5 depicts the graph data depicting the plot of effect of temperature on electrical
resistance of electro-conductive fabric according to an embodiment of the present
invention. According to the embodiment, the device to the machine is also capable of
measuring various characteristics of electro-conductive fabric like temperatureresistivity
and is depticted in this graph.
HP ©• O-E L. H 3E. 2,4 - u-S- - 2.02 S | ? ^55.
9
FIG. 6 depicts the graph data depicting the plot of effect of voltage on current flow of
electro-conductive fabric according to an embodiment of the present invention.
. According to the embodiment, the device to the machine is also capable of
measuring various characteristics of electro-conductive fabric likevoltage-current
levels and is depticted in this graph.
FIG. 7 depicts the graph data depicting the plot of effect of voltage on temperature of
electro-conductive fabric according to an embodiment of the present invention.
According to the embodiment, the device to the machine is also capable of
measuring various characteristics of electro-conductive fabric likevoltage-temperature
levels and is depticted in this graph.
EXAMPLES:
The following examples are given by way of illustrating the present invention and should
not be construed to limit the scope of the invention.
Results and equipment capability analysis
The measurement reliability of this equipment was estimated in terms of repeatability
and reproducibility for determination of surface resistivity of electro-conductive fabric. In
this study, a set of ten samples electro-conductive fabric samples (prepared by
combination of chemical and electrochemical in situ polymerization) was randomly
chosen and five measurements were performed on each sample by each of three
different operators chosen. The results of measurements were analysed separately by
two statistical techniques, namely tabular method and analysis of variance. The gage
variability, product variability and total variability of the measurement system were
determined. The ratio of gage-to-product variability, which is an indicative of the
measurement capability of the equipment, was also determined.
Experimental data
The results of the above experiments are shown in Table 1. Here xvx2,x3 denote the
average resistance of fabrics as obtained by operators I, II and III, respectively.
Rl,R2,R3indicate the range of fabric resistance as obtained by operators I, II and III,
respectively. xj,x2,x3 represent the grand average resistance of fabrics as obtained by
operators I, II, and III, respectively. Rt,R2,R3 refer to the average of ranges of fabric
resistance as obtained by operators I, II, and III, respectively.
a) Measurements of electrical surface resistance of fabrics obtained by operator I
Sample
1
1
4.94
2
4.8
Electrical resistance (Q)
3
4.84
4
4.69
5
4.76
*4.81
* ,
0.25
ELItl Z4-B&-2M1S 17-b-fe
10
Tabular method of system capability analysis
Estimation of gage repeatability
It is known that the gage repeatability assesses whether the same operator can measure the
same sample multiple times with the same instrument and get the same value. In fact, the gage
repeatability is an index that characterizes the capability of measurement equipment for
obtaining the same results under repeated measurements. The gage repeatability (6repealabililv)
is estimated as follows
repeatability j \ ' /
a2
where R indicates the average of the three average ranges R]t R2, R3 and d2 is a statistical
constant. The value of d2 can be obtained for sample of size five (number of measurements
performed on each sample by each operator) from the table required for obtaining constants for
the statistical control charts.
In this work, the numerical value of ^obtained was obtained as follows
^ = - ( ^ , + ^ 2 + ^ 3 ) = -(0.54 + 0.41 + 0.44) = 0.463 (2)
The estimate of gage repeatability was then calculated as follows
_R _ 0-463
^repeatability ~ , ~ j , ~ ^ — V-*-"™ (3)
where d2 for sample of size five was taken as 2.326.
Estimation of gage reproducibility
As known, the gage reproducibility assesses whether different operators after measuring a
parameter of the same sample on the same instrument can get the same value. Essentially, the
gage reproducibility indicates the variability that arises because of the differences among the
operators taking the measurements. If the measured values differ, the reason is due to the
biasness of the operators, since all three operators measure the same sample by using the
same instrument. The estimate of gage reproducibility is expressed as follows
12
.1
reproducibility j (4)
where orepmducmHy denotes the gage reproducibility and R= indicates the grand range. This is
expressed as follows
R* = x„„„ - x,
max mm (5)
Where, xmax and xmln denote the maximum and minimum of x,.x2,x3. Note thatx,,x2and x3
represent the individual measurements taken by operator I, operator II and operator III,
respectively, xis the average of measurement data for each sample, xdenotes the grand
mean of all measurements for all the samples.
In this case, the two quantities xmax and xmjn were calculated as follows
x^ = max (x,, x2, x^ ) = 5.43 (6)
%mn = min (f,, f2, %) = 5.26 " (7)
The grand range was then calculated as follows
^ = ^ « - ^ , » = 0 - 1 7 (8)
The estimate of gage repeatability was obtained as follows
p f)17
reproducibility j •< s-(\'> \&)
where d2 for sample of size three was taken as 1.693.
Estimation of gage variability
The gage variability includes both gage repeatability and gage reproducibility. The gage
variability is expressed as follows
2 2 2
gage repeatability reproducibility (''-'/
In this work, the gage variability was calculated as stated hereunder
°laSe=<7lPea,abi,i»+Reproducibility = { 0 - ^ (11)
Hence,
crgage= 0.223 (12)
Estimation of ratio of gage variability to product variability
The estimate of the standard deviation of total variability, including both product variability and
gage variability, can be obtained as o]otal = S2 where S denotes the standard deviation of data.
As we know that
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1874-DEL-2015-EDUCATIONAL INSTITUTION(S) [25-09-2024(online)].pdf
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1874-DEL-2015-FORM-8 [29-03-2024(online)].pdf
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1874-DEL-2015-Written submissions and relevant documents [28-03-2024(online)].pdf
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1874-DEL-2015-Correspondence to notify the Controller [19-02-2024(online)].pdf
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1874-DEL-2015-FER.pdf
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1874-DEL-2015-ABSTRACT [11-04-2022(online)].pdf
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1874-DEL-2015-FER.pdf
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1874-DEL-2015-FORM 18 [25-04-2019(online)].pdf
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1874-DEL-2015-US(14)-HearingNotice-(HearingDate-13-03-2024).pdf
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1874-DEL-2015-Correspondence to notify the Controller [19-02-2024(online)].pdf
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1874-del-2015-Form-1-(13-10-2015).pdf
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1874-DEL-2015-Written submissions and relevant documents [28-03-2024(online)].pdf
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1874-DEL-2015-FORM-8 [29-03-2024(online)].pdf
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1874-del-2015-GPA-(13-10-2015).pdf
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1874-DEL-2015-PatentCertificate31-05-2024.pdf
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1874-DEL-2015-EVIDENCE FOR REGISTRATION UNDER SSI [25-09-2024(online)].pdf
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1874-DEL-2015-EDUCATIONAL INSTITUTION(S) [25-09-2024(online)].pdf
2024-09-25
Search Strategy
ERegister / Renewals
Inforce
3rd: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹800
Certificate #183283
From 24/06/2017 - To 24/06/2018
4th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹800
Certificate #183284
From 24/06/2018 - To 24/06/2019
5th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹800
Certificate #183285
From 24/06/2019 - To 24/06/2020
6th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹800
Certificate #183286
From 24/06/2020 - To 24/06/2021
7th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹2,400
Certificate #183287
From 24/06/2021 - To 24/06/2022
8th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹2,400
Certificate #183288
From 24/06/2022 - To 24/06/2023
9th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹2,400
Certificate #183289
From 24/06/2023 - To 24/06/2024
10th: 31 Aug 2024
CBR 55045
Renewal 31/08/2024
Renewal Amount ₹2,400
Certificate #183290
From 24/06/2024 - To 24/06/2025
11th: 24 Jun 2025
CBR 33073
Renewal 24/06/2025
Renewal Amount ₹4,800
Certificate #52082
From 24/06/2025 - To 24/06/2026