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Sustainable Derived Electrodes For Hybrid Energy Storage Device And Lithium Ion Battery, And Fabrica

Abstract: Hybrid energy storage device and Lithium-ion battery manufacturing by recycling the disposed dry cells are disclosed. In some embodiments, the Hybrid energy storage device and lithium-ion battery comprising graphene (or lithium metal) as the negative electrode, collected and processed from the spent dry cell carbon rod and LiMn204@C as the positive, collected and processed from the spent dry cell bobbin powder is disclosed. Fabrication processes for manufacturing such hybrid energy storage device and Lithium-ion battery are disclosed.

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Patent Information

Application #
Filing Date
06 August 2019
Publication Number
07/2021
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2024-10-24
Renewal Date

Applicants

PONDICHERRY UNIVERSITY
PONDICHERRY UNIVERSITY, R.V.NAGAR, KALAPET, PUDUCHERRY-605014
CENTRAL POWER RESEARCH INSTITUTE BANGALORE
CENTRAL POWER RESEARCH INSTITUTE BANGALORE, PROF.SIR.C.V.RAMAN ROAD, POST BOX:8066, SADASIVA NAGAR(P.O.), BANGALORE-560080

Inventors

1. DR.P.ELUMALAI
DEPARTMENT OF GREEN ENERGY TECHNOLOGY, MADANJEET SCHOOL OF GREEN ENERGY TECHNOLOGIES, R.V. NAGAR, KALAPET, PUDUCHERRY-605 014. INDIA.
2. MS.HIMADRI TANAYA DAS
DEPARTMENT OF GREEN ENERGY TECHNOLOGY, MADANJEET SCHOOL OF GREEN ENERGY TECHNOLOGIES, R.V. NAGAR, KALAPET, PUDUCHERRY-605 014. INDIA.
3. MR.E.DURAISAMY
DEPARTMENT OF GREEN ENERGY TECHNOLOGY, MADANJEET SCHOOL OF GREEN ENERGY TECHNOLOGIES, R.V. NAGAR, KALAPET, PUDUCHERRY-605 014. INDIA.

Specification

SUSTAINABLY DERIVED ELECTRODES FOR HYBRID ENERGY STORAGE DEVICE AND LITfflUM-ION BATTERY, AND FABRICATION THEREOF FIELD OF INVENTION The invention relates to energy storage devices and in particular to hybrid devices with the synergistic effect of battery-type and capacitor-type electrode material which can bridge the gap between battery and supercapacitor. BACKGROUND OF INVENTION The development of energy storage devices in general have gained significance to meet the energy demands of the modern life. In particular, hybrid energy storage devices and their production from recyclable sources has gained particular attention. The usage of Lithium ion is increasing for everyday applications and are widely used in the portable electronics. The Lithium ion batteries have a very dominant usage in certain application areas. As with the characteristic of the ever-evolving market requirements, the battery manufacturers are continuously working on developing batteries with high energy density, power density and long cycle-life with short charging time. Thus, it is indispensable to develop high energy density hybrid energy storage devices which are also capable of delivering peak power demand. The most desirable energy storage device for various consumer electronics applications must have features of the batteries and that of the supercapacitors in a single platform. In this regard, there is more focus on energy storage devices using Li-ion hybrid capacitors and Li-ion battery. However, like any other any storage system, the usage of Li-ion batteries has their own shortcomings. One such disadvantage is that the material lithium is a relatively low abundance element on the earth. Apart from their widespread usage in energy storage for electronics, lithium has been used in various other applications such as lubricating greases, glasses and ceramics. Similarly, the other disposed energy devices such as dry cells (zinc-carbon battery) do not degrade easily, takes long years for degradation and adds up e-wastes every day, causing serious environmental problems. The objective of the invention is to propose a novel and hybrid energy storage device. Yet another object of the invention is to propose the manufacturing of the aforesaid hybrid energy storage devices with improved performance levels and to reduce e-wastes by means of recycling. A further object of the invention is to propose a sustainable approach for generating electrode materials to be used in the aqueous hybrid Li-ion capacitor and Li-ion battery. The sustainably developed LiMn O @C is used as positive and graphene as negative electrodes, wherein both the electrodes were extracted by recycling the disposed dry cells. SUMMARY OF THE INVENTION Hybrid energy storage devices with higher performance potentials are disclosed. In some embodiments, the energy storage devices comprise a positive electrode comprising aqueous Li-ion hybrid capacitor and Li-ion battery using sustainably developed LiMn204@C as positive and graphene as negative electrodes, wherein both the electrodes were extracted by recycling the disposed dry cells are disclosed. Fabrication processes for manufacturing the hybrid energy storage devices are disclosed. The other objectives and advantages of the device of the present disclosure will be further appreciated and understood when considered in combination with the following description and accompanying drawings. While the following description may contain specific details describing particular embodiments of the device of the present disclosure, this should not be construed as limitations to the scope of the device of the present disclosure but rather as an exemplification of preferable embodiments. For each aspect of the device of the present disclosure, many variations are possible as suggested herein that are known to those of ordinary skill in the art. A variety of changes and modifications may be made within the scope of the present disclosure without departing from the spirit thereof. BRIEF DESCRIPTION OF THE DRAWING FIG. la and lb are the XRD patterns and Raman spectrum that were recorded for the extracted LiMn204@C samples respectively. FIG. 2 is the SEM images recorded for the LiMn2C»4@C powder sample at different magnifications. FIG. 3 (a, b, c) are HR-TEM images, (d) is the SEAD-pattern, (e) EDAX profile and (f, g, h, i) are elemental mappings observed for the LiMn204@C sample. FIG. 4 (a) is the cyclic voltammograms at various scan rates, (b) Variation of the charge strorage contribution (%) with the scan rate; showing the diffusion-controlled and the capacitive charge at different scan rates (c) Galvonostatic charge-discharge profiles at various currents densities and (d) Cycle-life stability recorded at various current density for the LiMn204@C electrode in 1MIJ2SQ1. FIG. 5 (a) is the Raman spectrum recorded for the extracted graphene sample, (b) HR-TEM image with inset of SEM image for the Graphene (c) CV curves at scan rate and (d) Galvonostatic charge-discharge profiles at different current denity for the graphene electrode in 1M U2SO4. FIG. 6 (a) CV curves at different potential windows at 10 mV s"1 scan rate, (b) CV curves in the potential range of 0-2.4 V at different scan rates, (c) Galvonostatic charge-discharge profiles at different potential at 5 A g"1 and (d) Charge-discharge profiles at different current densities recorded for the CR2032 coin cell hybrid Li-ion capacitor in the aqeous 1M Li2SO"4. FIG. 7 (a) is the Ragone plot, (b) Life cycle data as well as Coulombic efficiency at 6 A g"' recorded for the CR2032 coin cell hybrid device in aqeous 1M Li2SO"4 and (c) Photograph of the two series- connected hybrid device powering an LED. FIG. 8 (a) is the charge-discharge profiles at 0.2C-rate and 8 (b) is the cycle life data recorded for the lithium-ion battery fabricated using spent-dry cell derived LiMn2C»4. DETAILED DESCIUPTION OF THE INVENTION The invention aims to solve the technical problem of improving the performances of hybrid energy storage devices and to reduce the e-wastes by recycling, wherein both the electrodes of the hybrid energy storage device were extracted from the disposed dry cells. Provided herein are carbon and LiMn204 based materials, fabrication processes, and Li-ion devices with improved performance. The hybrid energy storage device of the invention, the Li-ion hybrid capacitors use battery-type and capacitive-type electrode materials, which results in overall enhancement of electrochemical energy storage. Generally, in Li-ion hybrid capacitor, a lithium-rich material is used as positive electrode and a capacitive material is used as the negative electrode. The charge storage mechanism in the Li-ion hybrid capacitors relies on intercalation/ de-intercalation of Li+ ions at the battery-type electrode and the formation of electrical double layer (EDL) at the capacitive-type electrode. The Li-rich electrodes promote intercalation/de-intercalation of Li+ ions which can avoid the formation of resistivity layer at the electrode/electrolyte surface. This prevents capacity fading and results in longer cycle-life. The electrode materials such as LiV03, LiCo02 and LiMn204 are well-known battery materials for their high theoretical capacity and lithium richness. Among them, LiMn204 has been exploited as the positive electrode owing to its excellent Li-ion chemistry, ease of synthesis, environmentally benign and low cost. There are various methods such as sol-gel, hydrothermal, electrospinning, mechanochemical and solid-state process to synthesize LiMn204. The well pronounced plateau in the potential range of 0.6-0.8 V, confirm the intercalation/de-intercalation of Li+ during the charging/discharging process as reported for battery-type electrode. The specific capacity of the electrode was assessed from the charge-discharge profiles using the following formula : CF = I x At / m C g"1 (5) where Cp is specific capacity (C g~l), I is discharging current (A), At is discharge time (s) and m is active mass of the electrode material (g). The LiMn204@C electrode exhibits specific capacities as high as 570 C g"1 at 1 A g"1. This implies that the LiMn204@C electrode is capable of accommodating a higher amount of charge. Due to limited usage of the active material surface, the specific capacity of LiMn204@C electrode falls upon increasing the current density. Besides, higher amount of charge storage and rate capability, the stability of the electrode is also an important parameter for developing a potential electrode for reliable energy storage device. Figure 4(d) represents the specific capacity retention ability of the LiMn204@C electrode recorded at different current densities for each 100 cycles. Interestingly, the LiMn204@C electrode revealed only 8 % capacity loss after 1100 cycles at 1 A g"1 due to the presence of conductive carbon network. B.3. Characterization and Capacitive Performances of the Graphene in Li ? SOd Electrolyte In Figure 5a, the Raman shifts present at 1310, 1580 and 2610 cm'1 are signature peaks of D, G and 2D bands of graphene. Thus, the sample extracted from the carbon rod of disposed dry cell is confirmed to be graphene. The surface morphology of graphene examined by SEM revealed the presence offtakes with few layers graphene as shown in (Figure 5b). The layers are of 4 urn width stacked one over other. The graphene sheets are associated with the pores of size about 1 urn. Further, the morphological characteristics were carried out in detail using HR-TEM shown in (Fig. 5b). It can be seen that the graphene layers have average width of 200 nm and spread over the matrix. The capacitive property of the graphene in the aqueous electrolyte of 1M U2SO4 was initially assessed by CV studies in the potential range of-0.4 to 0.8 V at different scan rates 2, 10, 20, 50 and 100 mV s*1. The obtained CV curves are shown in Figure 5(c). A quasi-rectangular shape CV curves have been observed in all the scan rates. Such shape of the CVs curves confirms that the capacitor behaviour is mainly contributed by double layer formation or non-Faradaic nature of charge storage. Along with surface charge storage, there would be small diffusion of Li-ions from the electrolyte (Li2SCM) into the graphene layers. This would have resulted in a minor hump in the CV curve at 0.16 V during anodic reactions. Figure 5(d) shows the charge-discharge profiles recorded for the graphene electrode at different current densities in 1M L12SO4. Unlike the EDLC nature of the graphene, the charge-discharge profiles are not exactly mirror images. This unevenness may be due presence of some redox species as has been observed in CV. As the current density increased the charge-discharge times decreased significantly. The specific capacitance of the graphene electrode can be calculated from the charge-discharge profiles using the following formula: Cs=Ixt/mxV Fg"1 (6) where Cs is specific capacitance (F g"1), I is the current (A), t is discharge time (s), m is active mass (g) and V is potential window (V). The graphene electrode exhibited specific capacitance of 293, 277, 254, 222, 160 F g-1 corresponding to 1, 2, 3, 4, 5 A g"' current densities, respectively. It is confirmed that the graphene electrode retained about 60 % of its capacity at higher current density. B.4.Performances of Coin cell Hybrid Li-ion Capacitor (LiMn204@C I LJ2SQ4lGraphene) The electrochemical analysis of the LiMn204@C and graphene electrodes in the three-electrode system revealed that the asymmetric device could work at a wide potential window in 1M Li2S04. Thus, the CV curves for the Li-ion hybrid capacitor fabricated in the form of coin cells were performed at different potential windows at a scan rate of 10 mV s"'. Figure 6(a) implies that the hybrid device can be operated potential up to 2.4 V. Then, the CV curves of the hybrid device were recorded at different scan rates in the optimized potential range of 0- 2.2 V. The obtained CV curves are shown in Figure 6(b). It is evidently seen that in all scan rates, the CV curves have Faradaic as well as non-Faradaic contributions, confirming perfect hybrid capacitor behaviour of the device. Figure 6(c) shows the charge-discharge profiles recorded for the same coin cell Li-ion hybrid capacitor at a current density of 5 A g'1 in different potential windows. The obtained asymmetric charge/discharge profiles substantiate the aforementioned CV data. Figure 6(d) shows the charge/discharge profiles obtained for the device in the potential window of 0-2.2 V at various current densities. Clear plateau during charging/discharging process is seen, confirming presence of Faradaic process and double layer charge storage. From the charge-discharge profiles, the energy density (E) and power density (P) of the hybrid device were calculated by using the following formula: E = 0.5 x 0.28 C (AV)2 W h kg"1 (7) P = E x 3600/ At W kg"1 (8) where E is energy density (W h kg"1), C is specific capacitance of the hybrid device, AV is potential window and P is power density (W kg"1)- Figure 7(a) shows the obtained Ragone plot for the fabricated coin cell Li-ion hybrid capacitor. The hybrid proto-type device delivered high energy density of 122 W h kg-1 at power density of 11.07 kW kg"1 operating at wide potential window of 0-2.2 V. Figure 7(b) represents the life-cycle data recorded for the hybrid device at 6 A g'1. There is a 40 % loss of charge storage at 320th cycle, then, the charge storage remains constant for long 3000 cycles. Again, a hike of 13 % of capacity is upheld till 8000 cycles and lastly 8 % reduction is resulted at the end of 10,000* cycle. Thus, the hybrid capacitor exhibits excellent stability. It is noted that the hybrid capacitor also exhibited excellent Coulombic efficiency (97 %) even at 10,000th cycle at 6 A g"'. Figure 8(a) shows the charge-discharge profiles recorded for the lithium-ion battery having lithium metal as anode and LiMn2CU as cathode. It is seen that two plateau regions at about 4.0 V and 3.0 V during discharge and charging. Notably, stabilized charge-discharge profiles are seen after 30 cycles, implying excellent cycling stability of the battery. Figure 8(b) shows the rate capability of examined for the battery. It is seen that discharge capacity at initial few cycles are bit varying, this may be due to activation of the LiMn204 for intercalation with lithium ion. Undoubtedly after 20th cycle, the battery exhibits almost stable discharge capacity of about 175 mA h g"1 even at 80th cycle. In conclusion, the instant invention provides an excellent hybrid energy storage device that has the best features of a supercapacitor and a lithium ion battery. The development of hybrid energy storage device with high energy (100-125 Wh kg"1) and power densities (7-11 kW kg"1) and when connected in series or alone can power a wide variety of consumer electronics. Further, the aqueous Li-ion conducting electrolyte provides a wide potential window for the device operation and potential electrode material of Li-rich coated with carbon helps in reducing the capacity fading and thus improving the performance. More important is the fact that the potential electrode materials for Li-ion capacitor and Li-ion battery are derived from recycling the disposed battery and hence provides an excellent alternative for sustainability, recycling and reducing e-wastes. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Any reference to "or" herein is intended to encompass "and/or" unless otherwise stated. While the preferable embodiments of the current invention have been discussed and described as appropriate, it will be obvious to a person skilled in the art that such embodiments are provided by way of example only. Numerous variations, changes, and substitutions are possible without departing from the scope of the present disclosure. Various alternatives to the embodiments of the present disclosure described herein may be employed while practicing the disclosure of the current invention. Further, it is intended that the following claims define the scope of the present disclosure and that methods and structures within the scope of these claims and their equivalents be covered thereby. Also, throughout the disclosure of the current invention, the numerical features are presented in a way of range format. The description in range format is merely for suitability and convenience and should not be construed as an inflexible limitation on the scope of any of the embodiments of the current invention. Accordingly, the description of a range mentioned is to be considered as disclosing all the possible subranges as well as individual numerical values within that range to the tenth of the unit of the lower limit unless the context clearly dictates otherwise. For example, description of a range such as from I to 5 should be considered to have specifically disclosed subranges such as from I to 2, from I to 3, from 1 to 4, from 2 to 4, from 2 to 3, and from 3 to 4, as well as individual values within that range, for example, 1.1, 2, 2.3, 4, and 4.9. This applies regardless of the breadth of the range. The upper and lower limits of these intervening ranges may independently be included in the smaller ranges, and are also encompassed within the present disclosure, subject to any specifically excluded limit in the stated range. Where the stated range includes one or both of the limits, ranges excluding either or both of those included limits are also included in the present disclosure, unless the context clearly dictates otherwise. CLAIMS 1. A method of fabricating energy storage device by recycling the disposed dry cells comprises: a) dismantling the spent battery to collect the carbon rod and the spent bobbin and then ground to fine powders separately b) collecting the powder from the carbon rod and processing it to obtain graphene c) collecting the spent bobbin powder and processing it to obtain LiMn204@C powder. d) fabricating the device comprising graphene as the negative electrode or anode, LiMn204@C, as the positive electrode or the cathode along with other components such as separators and current collectors 2. The method of claim 1, wherein the processing of collected powder from the carbon rod to obtain graphene comprises; a) washing the collected powder with deionised water (Dl) and subjecting it to acid leaching with acids such as rfcSCM, HCI, HNO3 for a time span of 20-24 hours b) exfoliating the acid-leached carbon powder by adding 0.5 - 2-grams of surfactants such as sodium dodecyl sulphate (SDS), Sodium cholate, cetyltrimethylammonium bromide (CTAB) in solvents such as NMP, ethanol, water and sonicating for 3 - 5 hours c) subjecting the resulting substrate to centrifugation (3000 - 6000 rpm) followed by subsequent filtration process d) drying the filtered powder at 70 -100 O overnight to obtain exfoliated few layers of graphene. 3. The method of claim 1, wherein the processing of collected powder from dismantled cathode or spent bobbin powder to obtain LiMn204@C comprises; a) washing the collected powder with deionised water and ethanol or acetone b) drying the residue overnight at 70 -100 D and annealed at 800 D) mixing the dried black powder with LiOH and annealing at 650 - 800 D in air for about 8-12 hours to obtain a dark black-brown product c) washing the obtained dark black-brown product with deionised water (DI) repeatedly and to wash out unreacted bobbin and drying the washed product at 70 -100 D overnight to get the LiMm04@C powder 4. A hybrid Li-ion capacitor with the electrodes extracted by recycling the disposed dry cells comprising: a) graphene, the negative electrode comprising a binder such as polyvinylidene difluoride (PVDF), Polytetrafluoroethylene (PTFE), polysodium acrylate (PAADNa); and a conductive additive such as Sp carbon, acetylene black, activated carbon; b) LiMn204@C, the positive electrode comprising a binder such as polyvinylidene difluoride (PVDF), Polytetrafluoroethylene (PTFE), polysodium acrylate (PAADNa); and a conductive additive such as Sp carbon, acetylene black, activated carbon; c) slurry was prepared by adding a solvent such as NMP, ethanol, water and coated on a current collector such as carbon cloth, nickel foam, stainless steel, copper foil and the slurry paste of the said electrodes applied on a substrate d) separator between the negative electrode and the positive electrode e) L12S04 as the electrolyte 5. A Li-ion battery with the electrodes extracted by recycling the disposed dry cells comprising: a) LiMn204@C, the cathode comprising a binder such as polyvinylidene difluoride (PVDF), Polytetrafluoroethylene (PTFE), polysodium acrylate (PAADNa); and a conductive additive such as Sp carbon, acetylene black, activated carbon b) slurry was prepared by adding a solvent such as NMP, ethanol, water and coated on a current collector such as carbon cloth, nickel foam, stainless steel, copper foil and the slurry paste of the said electrodes applied on a substrate c) Lithium metal as used as anode, and a separator between the anode and the cathode d) LiPF4 in EC/DEC as the electrolyte 6. The Hybrid Lithium-ion capacitor of claim 1, having a high energy density of 100-125 Wh kg'1 and power density of 7-11 kW kg"1 7. The Lithium-ion battery of claim 1, having a storage capacity of about 150 mAh g"' to about 200 mAh/g-1

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# Name Date
1 201941031761-EDUCATIONAL INSTITUTION(S) [22-01-2025(online)].pdf 2025-01-22
1 201941031761-IntimationOfGrant24-10-2024.pdf 2024-10-24
1 Form5_As Filed_06-08-2019.pdf 2019-08-06
2 201941031761-OTHERS [22-01-2025(online)].pdf 2025-01-22
2 201941031761-PatentCertificate24-10-2024.pdf 2024-10-24
2 Form3_As Filed_06-08-2019.pdf 2019-08-06
3 201941031761-IntimationOfGrant24-10-2024.pdf 2024-10-24
3 201941031761-Written submissions and relevant documents [08-10-2024(online)].pdf 2024-10-08
3 Form2 Title Page_Complete_06-08-2019.pdf 2019-08-06
4 Form1_As Filed_06-08-2019.pdf 2019-08-06
4 201941031761-US(14)-ExtendedHearingNotice-(HearingDate-27-09-2024)-1100.pdf 2024-09-27
4 201941031761-PatentCertificate24-10-2024.pdf 2024-10-24
5 Drawing_As Filed_06-08-2019.pdf 2019-08-06
5 201941031761-Written submissions and relevant documents [08-10-2024(online)].pdf 2024-10-08
5 201941031761-Correspondence to notify the Controller [02-09-2024(online)].pdf 2024-09-02
6 Description Complete_As Filed_06-08-2019.pdf 2019-08-06
6 201941031761-US(14)-HearingNotice-(HearingDate-26-09-2024).pdf 2024-08-30
6 201941031761-US(14)-ExtendedHearingNotice-(HearingDate-27-09-2024)-1100.pdf 2024-09-27
7 Correspondence by Applicant_ As Filed_06-08-2019.pdf 2019-08-06
7 201941031761-Correspondence to notify the Controller [02-09-2024(online)].pdf 2024-09-02
7 201941031761-CLAIMS [22-07-2024(online)].pdf 2024-07-22
8 201941031761-COMPLETE SPECIFICATION [22-07-2024(online)].pdf 2024-07-22
8 201941031761-US(14)-HearingNotice-(HearingDate-26-09-2024).pdf 2024-08-30
8 Claims_As Filed_06-08-2019.pdf 2019-08-06
9 201941031761-CLAIMS [22-07-2024(online)].pdf 2024-07-22
9 201941031761-FER_SER_REPLY [22-07-2024(online)].pdf 2024-07-22
9 Abstract_As Filed_06-08-2019.pdf 2019-08-06
10 201941031761-COMPLETE SPECIFICATION [22-07-2024(online)].pdf 2024-07-22
10 201941031761-FORM-26 [29-07-2023(online)].pdf 2023-07-29
10 201941031761-OTHERS [22-07-2024(online)].pdf 2024-07-22
11 201941031761-FER_SER_REPLY [22-07-2024(online)].pdf 2024-07-22
11 201941031761-FORM 18 [29-07-2023(online)].pdf 2023-07-29
11 201941031761-FORM-8 [27-04-2024(online)].pdf 2024-04-27
12 201941031761-FER.pdf 2024-04-05
12 201941031761-FORM 18A [12-02-2024(online)].pdf 2024-02-12
12 201941031761-OTHERS [22-07-2024(online)].pdf 2024-07-22
13 201941031761-FORM-8 [27-04-2024(online)].pdf 2024-04-27
13 201941031761-EVIDENCE OF ELIGIBILTY RULE 24C1f [12-02-2024(online)].pdf 2024-02-12
14 201941031761-FER.pdf 2024-04-05
14 201941031761-FORM 18A [12-02-2024(online)].pdf 2024-02-12
15 201941031761-EVIDENCE OF ELIGIBILTY RULE 24C1f [12-02-2024(online)].pdf 2024-02-12
15 201941031761-FORM 18 [29-07-2023(online)].pdf 2023-07-29
15 201941031761-FORM-8 [27-04-2024(online)].pdf 2024-04-27
16 201941031761-FORM 18A [12-02-2024(online)].pdf 2024-02-12
16 201941031761-FORM-26 [29-07-2023(online)].pdf 2023-07-29
16 201941031761-OTHERS [22-07-2024(online)].pdf 2024-07-22
17 Abstract_As Filed_06-08-2019.pdf 2019-08-06
17 201941031761-FER_SER_REPLY [22-07-2024(online)].pdf 2024-07-22
17 201941031761-FORM 18 [29-07-2023(online)].pdf 2023-07-29
18 Claims_As Filed_06-08-2019.pdf 2019-08-06
18 201941031761-FORM-26 [29-07-2023(online)].pdf 2023-07-29
18 201941031761-COMPLETE SPECIFICATION [22-07-2024(online)].pdf 2024-07-22
19 201941031761-CLAIMS [22-07-2024(online)].pdf 2024-07-22
19 Abstract_As Filed_06-08-2019.pdf 2019-08-06
19 Correspondence by Applicant_ As Filed_06-08-2019.pdf 2019-08-06
20 201941031761-US(14)-HearingNotice-(HearingDate-26-09-2024).pdf 2024-08-30
20 Claims_As Filed_06-08-2019.pdf 2019-08-06
20 Description Complete_As Filed_06-08-2019.pdf 2019-08-06
21 201941031761-Correspondence to notify the Controller [02-09-2024(online)].pdf 2024-09-02
21 Correspondence by Applicant_ As Filed_06-08-2019.pdf 2019-08-06
21 Drawing_As Filed_06-08-2019.pdf 2019-08-06
22 201941031761-US(14)-ExtendedHearingNotice-(HearingDate-27-09-2024)-1100.pdf 2024-09-27
22 Description Complete_As Filed_06-08-2019.pdf 2019-08-06
22 Form1_As Filed_06-08-2019.pdf 2019-08-06
23 201941031761-Written submissions and relevant documents [08-10-2024(online)].pdf 2024-10-08
23 Drawing_As Filed_06-08-2019.pdf 2019-08-06
23 Form2 Title Page_Complete_06-08-2019.pdf 2019-08-06
24 201941031761-PatentCertificate24-10-2024.pdf 2024-10-24
24 Form1_As Filed_06-08-2019.pdf 2019-08-06
24 Form3_As Filed_06-08-2019.pdf 2019-08-06
25 Form5_As Filed_06-08-2019.pdf 2019-08-06
25 Form2 Title Page_Complete_06-08-2019.pdf 2019-08-06
25 201941031761-IntimationOfGrant24-10-2024.pdf 2024-10-24
26 Form3_As Filed_06-08-2019.pdf 2019-08-06
26 201941031761-OTHERS [22-01-2025(online)].pdf 2025-01-22
27 Form5_As Filed_06-08-2019.pdf 2019-08-06
27 201941031761-EDUCATIONAL INSTITUTION(S) [22-01-2025(online)].pdf 2025-01-22

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