Sign In to Follow Application
View All Documents & Correspondence

Separator For Battery To Which Functional Binder Is Applied And Electrochemical Device Applying Same

Abstract: The present invention relates to: a functional binder in a separator that comprises a porous polyolefin substrate and an organic-inorganic composite porous coating layer which includes a mixture of a binder compound with inorganic particles formed on at least one surface of the substrate; and a separator comprising the same wherein the functional binder can increase adhesion between a binder and an inorganic material and between a substrate and a binder while pre-empting an internal short-circuit through a self-healing function for partial damage of the separator improve adhesion of the separator to a cathode and an anode and respond to elution of a cathode material transition metal. In the binder according to the present invention the proportion of the hydroxyl group in each molecule is 10% by weight or more.

Get Free WhatsApp Updates!
Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
24 April 2019
Publication Number
31/2019
Publication Type
INA
Invention Field
ELECTRICAL
Status
Email
mahua.ray@remfry.com
Parent Application
Patent Number
Legal Status
Grant Date
2024-02-27
Renewal Date

Applicants

LG CHEM, LTD.
128, Yeoui-daero Yeongdeungpo-gu Seoul 07336

Inventors

1. NAM, Kwan Woo
188, Munji-ro Yuseong-gu Daejeon 34122
2. YOON, Su Jin
188, Munji-ro Yuseong-gu Daejeon 34122
3. KWON, Hye Jin
188, Munji-ro Yuseong-gu Daejeon 34122
4. KIM, Chan Jong
188, Munji-ro Yuseong-gu Daejeon 34122
5. LEE, Je An
188, Munji-ro Yuseong-gu Daejeon 34122

Specification

[1]The present invention relates to a separator and an electrochemical device containing the same comprising a, a functional binder improves the inorganic particles and the coating properties on a surface of a polyolefin substrate in detail relates to a separation membrane is functional binder is applied. BACKGROUND [2]Battery separators, in particular, many studies are in progress to improve the reliability of the lithium ion secondary battery separator. Enhanced safety membrane (Safety Reinforced Separator, hereinafter 'SRS') that are currently in production will have an inorganic particle and a binder on a polyolefin-based substrate is coated on the surface. Due to the pore structure due to the inorganic particles and a binder has the advantage of improving the performance and reliability of the electrochemical devices using the separation membrane through which to increase the space for the liquid electrolyte into a lithium ion conductivity and electrolyte impregnation rate becomes high at the same time . Patent Document 1 discloses an electrochemical device using the associated organic / inorganic composite porous separator, and this. [3] In order to maintain the stability of the SRS binder for the inorganic material from falling from the polyolefin substrate surface, inorganic material, the base material - is very important adhesion properties of the binder. Binders currently in use, it is necessary for the development of new binder to improve stability because of a PVDF-based low adhesion characteristics of the binder. [4] A binder of PVDF-based adhesive is one of the positive electrode is excellent, and a cathode that use SBR (Styrene-Butadiene Rubber) based binder has a disadvantage poor adhesion. In addition, the PVDF-based binder has a problem that because it is hydrophobic lowering the output of the battery because of poor wetting characteristics of the membrane for the electrolyte solution. [5] Currently, SRS can not cope with the transition metal cathode material leaching of a high temperature / high voltage condition that can often occur, etc. Operation of the electric car has a problem. Conventional binder can not not adsorb transition metal eluted there is a problem in that the life characteristics of the battery decreases. [6] In addition, heat output and reduced safety of the battery by the membrane damage is irreversible once the damaged membrane due to the pressure is also a problem that recovery is not possible. [7] There are various attempts to introduce a compound containing hydrophilic groups is made in order to improve the properties of the membrane. Non-Patent Document 1 serves to improve the commercially available PP (Polypropylene) membrane-wetting characteristics of the lithium ion cell, was developed surface coating PP immersing the substrate in the natural vegetable polyphenylene tannic acid. However, the surface of the PP has a disadvantage in the coating in the production and discharge of an electrochemical device using the same, as well as the tannic acid, which contains a hydrophobic, so a lot of hydroxyl groups not evenly distributed in the PP surface can not have sufficient durability. [8] Non-Patent Document 2 serves to improve the wetting properties of the PP substrate used as a separator of a lithium ion battery, a method of coating using gallic acid (Pyrogallic acid) Pyro described. Non-Patent Document 2 also, in the production and discharge of rain because the physical and chemical affinity with the PP gallic acid hydrophobic Pyro as Patent Document 1 to fall, but the short term to obtain a uniform coating, electro using the same chemical element coating It does not have a sufficient durability and uniformity. [9] Non-binder with a self-healing function and so on of the capsule forms a binder for improving the properties of the negative electrode containing silicon in Patent Document 3 to 6 is introduced. If the capacity is used for high silicon negative electrode, since the conventional PVDF such weak engagement with the silicone has a current SRS binder it is difficult to apply directly as a problem to develop new binder to improve them. [10] A technique of adding a binder to the SRS film outermost layer described in Patent Document 2 in order to improve the wetting characteristics of the membrane. Due to the film of the outermost layer, but hydrophilic is improved, there is a limit to the access of the pore blossomed and performance problems that can not be found to improve the stability of the electrochemical device formed by the inorganic particles and a binder. [11] Patent Document 3 is a cell membrane and it relates to a non-aqueous electrolyte battery using, in the battery separator formed by the multi-layer porous film having a heat-resistant porous layer containing a resin porous film containing as a main component a thermoplastic resin and a heat-resistant fine particles as a main component, wherein the thickness of the heat-resistant porous layer, and 1~15㎛, will the peeling strength at 180 ° of the porous resin layer and the heat-resistant porous layer, on the cell membrane, characterized in that not less than 0.6N / ㎝. [12] The present invention and Patent document 3 all have in common to a point on the separator of a lithium secondary battery having improved thermal stability. However, the binder of the present invention has the object who never recognized in Patent Document 3, etc. In addition to thermal stability, improved adhesion, the positive re-adsorption of the transition metal, self-healing, Because of this, there is a large difference in the molecular structure of the binder. The present invention points that use -O and hydroxy (OH), while the binder includes a functional group number, Patent Document 3 is a polymer or a water-soluble cellulose derivatives of N- vinylacetamide as a binder, and crosslinked acrylic resin in the molecule in a difference. [13] On the other hand, Patent Document 3 is used as a thickening agent xanthan gum, which is used as a binder in the present invention. Binders and thickeners are greater differences in the amount that is used by default. The composition ratio of the binder in the patent document 3 has the composition ratio of the thickening agent whereas more than 1.1 parts by mass based on 100 parts by weight of heat-resistant fine particles are used at least 0.1 parts by mass based on 100 parts by weight of heat-resistant fine particles. With the composition ratio is about 10 times the difference in the bar, the binder and the thickener can be seen that not interoperable with each other as possible. The present invention and Patent document 3, because some similarities, but differ in that the specific purpose of using xanthan gum in the Patent Document 3 can be seen that do not understand at all the technical features of the binder that is used in the present invention. [14] Non-Patent Document 7 is described in a review article that point on natural substances that are used in the electrochemical energy storage device include the amylopectin, xanthan gum natural binder materials are used. However, a non-binder of Patent Document 7 are all as the binder of the positive electrode or the negative electrode and the binder of the separator that is used in the present invention is different in its purpose and function. In particular, the separation membrane for a binder of the present invention can be seen that the membrane material used in the positive electrode and the negative electrode in the sense that contains an inorganic substance, so all have different properties detailed art are different. [15] Inorganic base material-binder in order to maintain the thermal stability of the SRS separator containing inorganic particles as described above while increasing the adhesion of the binder, and at the same time prevent an internal short circuit via a self-healing function for some damage to the membrane in advance , improve the adhesive force between the separator and the positive and negative electrodes, for a technology, which may correspond to the elution of the positive electrode material the transition metal bar is not clear solutions suggested to date. [16] Republic of Korea Patent No. 10-0775310 call. [17] Republic of Korea Patent No. 10-1535198 call. [18] Republic of Korea Patent Application Publication No. 2011-0031998 No. [19] Lei Pan et al., "Tannic-Acid-Coated Polypropylene Membrane as a Separator for Lithium-Ion Batteries", ACS Appl. Mater. Interfaces, 7(29), 16003-16010(2015). [20] Haibin Wang et al., "Pyrogallic acid coated polypropylene membranes as separators for lithium-ion batteries", J. Mater. Chem. A, 3, 20535-20540 (2015). [21] S.R. White et al., "Autonomic healing of polymer composites", Nature, 409, 794-797 (2001). [22] Benjamin C-K Tee et al., "Pressure and flexionsensitive electronic skin with repeatable ambient self-healing capability", Nature nanotechnology, 7, 825 (2012). [23] Chao Want et al., "Self-healing chemistry enables the stable operation of silicon microparticle anodes for high-energy lithium-ion batteries", Nature Chemistry, 5, 1042-1048 (2013). [24] You Kyeong Jeong et al., "Millipede-inspired Structural Design Principles for High Performance Polysaccharide Binders in Silicon Anodes", Energy & Environmental Science, 8 1224 (2015). [25] Hua Wang et al., "Nature-Inspired Electrochemical Energy-Storage Materials and Devices", Adv. Energy Materials 1601709 (2016). Detailed Description of the Invention SUMMARY [26] The present invention is a porous polyolefin base material, inorganic particles and a binder organic containing compound formed on at least one side of the base - in the separating membrane, including inorganic composite porous coating layer, a binder-mineral, described - while increasing the adhesion of the binder, at the same time membrane prevented the internal short-circuit through the self-healing function for some damage and a separation membrane and the anode, and improves the adhesion between the negative electrode cell membrane comprising functional binder, and it can respond to the elution of the positive electrode material transition metals of to provide for the purpose. Problem solving means [27] A first aspect of the present invention for solving the above problems includes: (a) a polyolefin substrate; And (b) a cell membrane to the surface and at least one region selected from the group consisting of a part pores present in the base material of the substrate comprises a coating the active layer of a mixture of inorganic particles and a binder, wherein the active layer has the inorganic by the binder in between the particles is connected and fixed, due to the empty space (interstitial volume) between the inorganic particles to the cell membrane pore structure formed, [28] The binder provides a cell membrane is not less than 10% by weight ratio of the hydroxyl group occupied by each molecule. [29] Examples of the binders containing tannic acid, Pyro gallic acid, amylose, amylopectin, or at least one or more of xanthan gum, 1) tannic acid, Pyro gallic acid, amylose, amylopectin, at least one of xanthan gum mixture, and 2) a polyvinylidene pool fluoride-hexafluoro pool Luo of propylene (polyvinylidene fluoride-co-hexafluoropropylene), polyvinylidene pool fluoride-trichlorethylene (polyvinylidene fluoride-co-trichloroethylene), polymethyl methacrylate ( polymethylmethacrylate), polyacrylonitrile (polyacrylonitrile), polyvinylpyrrolidone (polyvinylpyrrolidone), polyvinyl acetate (polyvinylacetate), ethylene vinyl acetate copolymers (polyethylene-co-vinyl acetate), polyethylene oxide (polyethylene oxide), cellulose acetate (cellulose acetate), cellulose acetate butyrate (cellulose acetate butyrate), cellulose Agarose acetate propionate (cellulose acetate propionate), cyanoethyl pullulan (cyanoethylpullulan), cyanoethyl polyvinyl alcohol (cyanoethylpolyvinylalcohol), cyanoethyl cellulose (cyanoethylcellulose), cyanoethyl sucrose (cyanoethylsucrose), pullulan (pullulan ), carboxymethyl cellulose (carboxyl methyl cellulose), [30] The inorganic particles may be at least one member selected from the group consisting of inorganic particles with inorganic particles, and a lithium ion conductivity with the inorganic particles, piezoelectric (piezoelectricity) it is less than a dielectric constant of 5. [31] Inorganic particles is greater than or equal to the dielectric constant of 5, SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 or SiC, and; Inorganic particles having the piezoelectricity (piezoelectricity) is BaTiO 3 , Pb (Zr, Ti) O 3 (PZT), Pb 1-x La x Zr 1-y Ti y O 3 (PLZT), PB (Mg 3 Nb 2 / 3 ) O 3-PbTiO 3 (PMN-PT) or hafnia (HfO 2 ) and; Inorganic particles having the lithium ion conductivity include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (Li x Ti y (PO 4 ) 3 , 0 Preparation of a lithium ion battery separators are functional binder is applied. [60] Polyvinylidene fluoride - in a triple-chloro-ethylene copolymer (PVdF-CTFE) polymers, and tannic acid (in the weight ratio 50: 50) followed by the addition of about 5% by weight in acetone, by dissolving at least about 12 hours at a temperature of 50 ℃ a polymer solution was prepared. BaTiO to this polymer solution 3 powder BaTiO 3 / (PVdF-CTFE and tannic acid) = 90/10 (weight% ratio) over 12 hours using a ball mill was added to the (ball mill) by using a method BaTiO 3 crushing and grinding of the powder to prepare a slurry. BaTiO of the thus prepared slurry 3 particle size can be controlled in accordance with the application time of the size (particle size) and the ball mill method of the beads used in the ball mill method, but the slurry was prepared by pulverizing to approximately 400㎚ in the first embodiment. In this way, the use of a slurry dip (dip) coating was coated on a polyethylene separator (porosity: 45%) of about 18㎛ thickness, coating thickness was controlled to be about 3㎛. As a result of measuring porosity by the measuring device (porosimeter), pore size and porosity within the active layer coated on the polyethylene separator was each 0.5㎛ and 58%. [61] heat shrinkage characteristics of the lithium ion battery separator functional binder is applied compared (see Fig. 7). [62] Embodiments, but that of Example 1, to prepare a cell membrane in the same manner was prepared Example 2 by changing the coating composition in a weight ratio of binder and inorganic substance to 15:85. Comparative Example 1 was produced in the same conditions as in Example 2 did not use the tannic acid in the binder. Comparative Example 1 and Example 2 was coated with each 5㎛, 3㎛ thickness. Embodiment showed superior physical properties compared with the conventional separator (Comparative Example 1) Example 2 and Comparative Example 1, the result of comparing the thermal contraction of the same 150 ℃, an embodiment according to the present invention Example 2 did not include tannic acid. In particular, Comparative Example 1, even though the thickness of the coating thicker and more naeteotda that the poor heat shrinkage properties in comparison with the second embodiment. MD in Figure 7 is machine direction, TD denotes the transverse direction, respectively and the length in the longitudinal direction as the transverse direction. Value indicates the MD / TD shrinkage (%) after heat shrinking the heat-shrinkable as described before and the top of each table. [63] Comparison of the separation membrane according to the binder molecule a hydroxyl group [64] Examples 3, 4, 5, is prepared a membrane in the same manner as in Example 1. Just as inorganic particles was used at a weight ratio of 85:15 alumina and boehmite, the mixing ratio of the inorganic material and a binder was 75: 25 weight ratio. Binder is PVdF-HFP: PVdF-CTFE: a hydroxy group-containing binder, 22: 1: 2 was prepared in a weight ratio, wherein the solvent was used as the 100% acetone. A hydroxyl group-containing binders were each use xanthan gum, tannic acid, amylose. The polyolefin substrate was used as PP. [65] 10 is a result of a comparison of the physical properties of the separation membrane according to Example 3, 4 and 5. In the context of the present invention means a polyolefin-based fabric. Was the adhesion of the substrate and the inorganic coating interface increases the ratio by weight of a hydroxy group according to a high load in the binder, the ionic conductivity also been shown to increase. The electrical resistance of the membrane showed no significant change. 10, the membrane / fabric interface adhesion at 11 is then attached to a double-faced tape to the glass surface when removing the substrate after bonding the inorganic material coating layer of the SRS on the second side of the double-sided tape will of measuring the separation strength of the inorganic coating layer and the substrate, membrane / electrode interface adhesive strength after a double-faced tape attached to the glass surface when removing the substrate after bonding the electrode to the second side of the double-sided tape is a measure of the strength of the separation electrode and the SRS. ER and ionic conductivity was measured as the conventional method, the separation membrane Gurely is as a measure of the air permeability, air permeability using a Toyoseiki Co. Gurley type Densometer (No. 158), depending on how long will it take (JIS Gurley) Measurement of Japanese Industrial Standard It was measured. I.e. air permeability means the time it takes to pass through 1 square inches of membrane (s) under a constant air pressure of 100cc of air is 4.8 inches. [66] Subjected to physical properties of the membrane according to Example 3, 4 and 5 are shown in Table 1 below. [67] TABLE 1 [68] Comparative physical properties according to the ratio of acetone solvent [69] Examples 6, 7, 8, 9, 10 is a separation membrane was prepared by the same method as in Example 3. The binder having a hydroxyl group was used as tannic acid. However, in the manufacture of a solvent, the weight ratio of water and acetone, respectively, 100: 100 was used: 0, 95: 5, 50:50, 25:75, 0. Each substrate was a physical property changes in the weight ratio of water and acetone in Fig. [70] The ratio of water and acetone exhibited a 25: 75 when the overall best effect. In view of the transmittance, electric resistance and ion conductivity, interfacial adhesion, such as the ratio of water and acetone is more than 50: 50 0: showed a range of a similar value at 100. The ratio of water and acetone will be optimal point is changed by the ratio of the hydroxyl group in the binder because affect the structure of the drying of the coating layer occupies, in view of the proportion of the hydroxy group according to the present invention, 60:40 to 0: 100 to be extended. [71] Example 6, the physical properties of the separator according to 7, 8, 9, 10 are shown in Table 2 below. [72] TABLE 2 Industrial Applicability [73] The present invention is a porous polyolefin base material, inorganic particles and a binder organic containing compound formed on at least one side of the base - in the separating membrane, including inorganic composite porous coating layer, a binder-mineral, described - while increasing the adhesion of the binder, at the same time for some damage to the membrane sikimyeo prevent an internal short circuit from occurring through the self-healing function and improve the adhesive force between the separator and the positive and negative electrodes, there is an advantage, which may correspond to the elution of the positive electrode material the transition metal. Claims [Claim 1](A) polyolefin-based substrate; And (b) a cell membrane to the surface and at least one region selected from the group consisting of a part pores present in the base material of the substrate comprises a coating the active layer of a mixture of inorganic particles and a binder, wherein the active layer has the inorganic by the binder between the particles is connected and fixed, the free space between the inorganic particles (interstitial volume) due to the pore in the cell membrane structure is formed, the binder proportion is 10 wt% or more battery separator is a hydroxyl group occupied in each molecule. [Claim 2] The method of claim 1, wherein the binder is a cell membrane containing a tannic acid, gallic acid pyrophosphate, amylose, amylopectin, at least one of xanthan gum. [Claim 3] The method of claim 1, wherein the binder is 1) tannic acid, a pie mixture comprising at least one of gallic acid, amylose, amylopectin, xanthan gum, and 2) a polyvinylidene pool fluoride-hexafluoropropylene pool Luo (polyvinylidene fluoride-co-hexafluoropropylene), polyvinylidene pool fluoride-trichlorethylene (polyvinylidene fluoride-co-trichloroethylene), polymethyl methacrylate (polymethylmethacrylate), polyacrylonitrile (polyacrylonitrile), polyvinylpyrrolidone (polyvinylpyrrolidone ), polyvinyl acetate (polyvinylacetate), ethylene vinyl acetate copolymers (polyethylene-co-vinyl acetate), polyethylene oxide (polyethylene oxide), cellulose acetate (cellulose acetate), cellulose acetate butyrate (cellulose acetate butyrate), cellulose acetate Pro propionate (cellulose acetate propionate), cyanoethyl pullulan (cyanoethylpullu lan), cyanoethyl polyvinyl alcohol (cyanoethylpolyvinylalcohol), cyanoethyl cellulose (cyanoethylcellulose), cyanoethyl sucrose (cyanoethylsucrose), pullulan (pullulan), carboxymethyl cellulose (carboxyl methyl cellulose), an arc Lee acrylonitrile styrene butadiene copolymer (acrylonitrilestyrene-butadiene copolymer), [Claim 4] The method of claim 1, wherein the inorganic particles are at least one member selected from the group consisting of a cell membrane inorganic particles with inorganic particles, and a lithium ion conductivity with inorganic particles, a piezoelectric (piezoelectricity) is less than a dielectric constant of 5. [Claim 5] The method of claim 4, wherein the inorganic particles is greater than or equal to the dielectric constant of 5, SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 , and or SiC .; Inorganic particles having the piezoelectricity (piezoelectricity) is BaTiO 3 , Pb (Zr, Ti) O 3 (PZT), Pb 1-x La x Zr 1-y Ti y O 3 (PLZT), PB (Mg 3 Nb 2 / 3 ) O 3 -PbTiO 3 (PMN-PT) or hafnia (HfO 2 ) and; Inorganic particles having the lithium ion conductivity include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (Li x Ti y (PO 4 ) 3 , 0

Documents

Orders

Section Controller Decision Date

Application Documents

# Name Date
1 201917016254-IntimationOfGrant27-02-2024.pdf 2024-02-27
1 201917016254.pdf 2019-04-24
2 201917016254-PatentCertificate27-02-2024.pdf 2024-02-27
2 201917016254-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [24-04-2019(online)].pdf 2019-04-24
3 201917016254-Written submissions and relevant documents [22-02-2024(online)].pdf 2024-02-22
3 201917016254-STATEMENT OF UNDERTAKING (FORM 3) [24-04-2019(online)].pdf 2019-04-24
4 201917016254-PROOF OF RIGHT [24-04-2019(online)].pdf 2019-04-24
4 201917016254-Correspondence to notify the Controller [05-02-2024(online)].pdf 2024-02-05
5 201917016254-US(14)-ExtendedHearingNotice-(HearingDate-08-02-2024).pdf 2024-01-18
5 201917016254-PRIORITY DOCUMENTS [24-04-2019(online)].pdf 2019-04-24
6 201917016254-REQUEST FOR ADJOURNMENT OF HEARING UNDER RULE 129A [04-01-2024(online)].pdf 2024-01-04
6 201917016254-FORM 1 [24-04-2019(online)].pdf 2019-04-24
7 201917016254-US(14)-HearingNotice-(HearingDate-08-01-2024).pdf 2023-12-21
7 201917016254-DRAWINGS [24-04-2019(online)].pdf 2019-04-24
8 201917016254-Response to office action [23-10-2023(online)].pdf 2023-10-23
8 201917016254-DECLARATION OF INVENTORSHIP (FORM 5) [24-04-2019(online)].pdf 2019-04-24
9 201917016254-COMPLETE SPECIFICATION [24-04-2019(online)].pdf 2019-04-24
9 201917016254-Response to office action [24-04-2023(online)].pdf 2023-04-24
10 201917016254-OTHERS-260419.pdf 2019-05-02
10 201917016254-Response to office action [02-01-2023(online)].pdf 2023-01-02
11 201917016254-Correspondence-260419.pdf 2019-05-02
11 201917016254-Response to office action [16-12-2022(online)].pdf 2022-12-16
12 201917016254-8(i)-Substitution-Change Of Applicant - Form 6 [25-11-2022(online)].pdf 2022-11-25
12 201917016254-FORM-26 [04-05-2019(online)].pdf 2019-05-04
13 201917016254-ASSIGNMENT DOCUMENTS [25-11-2022(online)].pdf 2022-11-25
13 201917016254-Power of Attorney-060519.pdf 2019-05-09
14 201917016254-Correspondence-060519.pdf 2019-05-09
14 201917016254-PA [25-11-2022(online)].pdf 2022-11-25
15 201917016254-FORM 3 [23-09-2022(online)].pdf 2022-09-23
15 abstract.jpg 2019-06-06
16 201917016254-Correspondence-220422.pdf 2022-04-25
16 201917016254-FORM 3 [15-10-2019(online)].pdf 2019-10-15
17 201917016254-GPA-220422.pdf 2022-04-25
17 201917016254-FORM 3 [14-04-2020(online)].pdf 2020-04-14
18 201917016254-ABSTRACT [22-04-2022(online)].pdf 2022-04-22
18 201917016254-FORM 18 [15-07-2020(online)].pdf 2020-07-15
19 201917016254-CLAIMS [22-04-2022(online)].pdf 2022-04-22
19 201917016254-FORM 3 [28-09-2020(online)].pdf 2020-09-28
20 201917016254-COMPLETE SPECIFICATION [22-04-2022(online)].pdf 2022-04-22
20 201917016254-FORM 3 [10-03-2021(online)].pdf 2021-03-10
21 201917016254-DRAWING [22-04-2022(online)].pdf 2022-04-22
21 201917016254-FORM 3 [11-08-2021(online)].pdf 2021-08-11
22 201917016254-FER.pdf 2021-11-11
22 201917016254-FER_SER_REPLY [22-04-2022(online)].pdf 2022-04-22
23 201917016254-FORM 3 [14-01-2022(online)].pdf 2022-01-14
23 201917016254-OTHERS [22-04-2022(online)].pdf 2022-04-22
24 201917016254-OTHERS [22-04-2022(online)].pdf 2022-04-22
24 201917016254-FORM 3 [14-01-2022(online)].pdf 2022-01-14
25 201917016254-FER.pdf 2021-11-11
25 201917016254-FER_SER_REPLY [22-04-2022(online)].pdf 2022-04-22
26 201917016254-DRAWING [22-04-2022(online)].pdf 2022-04-22
26 201917016254-FORM 3 [11-08-2021(online)].pdf 2021-08-11
27 201917016254-COMPLETE SPECIFICATION [22-04-2022(online)].pdf 2022-04-22
27 201917016254-FORM 3 [10-03-2021(online)].pdf 2021-03-10
28 201917016254-CLAIMS [22-04-2022(online)].pdf 2022-04-22
28 201917016254-FORM 3 [28-09-2020(online)].pdf 2020-09-28
29 201917016254-ABSTRACT [22-04-2022(online)].pdf 2022-04-22
29 201917016254-FORM 18 [15-07-2020(online)].pdf 2020-07-15
30 201917016254-FORM 3 [14-04-2020(online)].pdf 2020-04-14
30 201917016254-GPA-220422.pdf 2022-04-25
31 201917016254-Correspondence-220422.pdf 2022-04-25
31 201917016254-FORM 3 [15-10-2019(online)].pdf 2019-10-15
32 201917016254-FORM 3 [23-09-2022(online)].pdf 2022-09-23
32 abstract.jpg 2019-06-06
33 201917016254-Correspondence-060519.pdf 2019-05-09
33 201917016254-PA [25-11-2022(online)].pdf 2022-11-25
34 201917016254-ASSIGNMENT DOCUMENTS [25-11-2022(online)].pdf 2022-11-25
34 201917016254-Power of Attorney-060519.pdf 2019-05-09
35 201917016254-8(i)-Substitution-Change Of Applicant - Form 6 [25-11-2022(online)].pdf 2022-11-25
35 201917016254-FORM-26 [04-05-2019(online)].pdf 2019-05-04
36 201917016254-Response to office action [16-12-2022(online)].pdf 2022-12-16
36 201917016254-Correspondence-260419.pdf 2019-05-02
37 201917016254-OTHERS-260419.pdf 2019-05-02
37 201917016254-Response to office action [02-01-2023(online)].pdf 2023-01-02
38 201917016254-COMPLETE SPECIFICATION [24-04-2019(online)].pdf 2019-04-24
38 201917016254-Response to office action [24-04-2023(online)].pdf 2023-04-24
39 201917016254-DECLARATION OF INVENTORSHIP (FORM 5) [24-04-2019(online)].pdf 2019-04-24
39 201917016254-Response to office action [23-10-2023(online)].pdf 2023-10-23
40 201917016254-DRAWINGS [24-04-2019(online)].pdf 2019-04-24
40 201917016254-US(14)-HearingNotice-(HearingDate-08-01-2024).pdf 2023-12-21
41 201917016254-FORM 1 [24-04-2019(online)].pdf 2019-04-24
41 201917016254-REQUEST FOR ADJOURNMENT OF HEARING UNDER RULE 129A [04-01-2024(online)].pdf 2024-01-04
42 201917016254-US(14)-ExtendedHearingNotice-(HearingDate-08-02-2024).pdf 2024-01-18
42 201917016254-PRIORITY DOCUMENTS [24-04-2019(online)].pdf 2019-04-24
43 201917016254-PROOF OF RIGHT [24-04-2019(online)].pdf 2019-04-24
43 201917016254-Correspondence to notify the Controller [05-02-2024(online)].pdf 2024-02-05
44 201917016254-Written submissions and relevant documents [22-02-2024(online)].pdf 2024-02-22
44 201917016254-STATEMENT OF UNDERTAKING (FORM 3) [24-04-2019(online)].pdf 2019-04-24
45 201917016254-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [24-04-2019(online)].pdf 2019-04-24
45 201917016254-PatentCertificate27-02-2024.pdf 2024-02-27
46 201917016254.pdf 2019-04-24
46 201917016254-IntimationOfGrant27-02-2024.pdf 2024-02-27

Search Strategy

1 search16254E_29-10-2021.pdf

ERegister / Renewals

3rd: 13 May 2024

From 05/01/2020 - To 05/01/2021

4th: 13 May 2024

From 05/01/2021 - To 05/01/2022

5th: 13 May 2024

From 05/01/2022 - To 05/01/2023

6th: 13 May 2024

From 05/01/2023 - To 05/01/2024

7th: 13 May 2024

From 05/01/2024 - To 05/01/2025

8th: 30 Dec 2024

From 05/01/2025 - To 05/01/2026