Patents by Inventor Maya Stevanovic
Maya Stevanovic has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9203090Abstract: A cathode slurry comprising organic solvent, lithium iron phosphate, polymeric binder, and at least one conductive agent, and from about 30 wt. % to about 40 wt. % solids is prepared. The cathode slurry may be coated onto at least one side of a substrate to form a cathode coated substrate. The cathode coated substrate may be dried to form a cathode. An anode and cathode may be contained within a housing with electrolyte to form a lithium ion cell.Type: GrantFiled: January 13, 2014Date of Patent: December 1, 2015Assignee: The Gillette CompanyInventors: Maya Stevanovic, Minkoo Kang
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Publication number: 20150200395Abstract: A cathode slurry comprising organic solvent, lithium iron phosphate, polymeric binder, and at least one conductive agent, and from about 30 wt. % to about 40 wt. % solids is prepared. The cathode slurry may be coated onto at least one side of a substrate to form a cathode coated substrate. The cathode coated substrate may be dried to form a cathode. An anode and cathode may be contained within a housing with electrolyte to form a lithium ion cell.Type: ApplicationFiled: January 13, 2014Publication date: July 16, 2015Applicant: The Gillette CompanyInventors: Maya STEVANOVIC, Minkoo KANG
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Patent number: 8859145Abstract: A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2) or a mixture of iron disulfide (FeS2) and iron sulfide (FeS) and conductive carbon particles. A cathode slurry is prepared comprising the FeS2 or FeS2 plus FeS powder, conductive carbon, binder, and a solvent. The binder is preferably a styrene-ethylene/butylene-styrene (SEBS) block copolymer. There is an advantage discovered in utilizing a hydronaphthalene solvent to form the cathode slurry. The preferred solvent is 1,2,3,4-tetrahydronaphthalene or decahydronaphthalene and mixtures thereof. The slurry mixture is coated onto a conductive substrate and the solvent evaporated leaving a dry cathode coating on the substrate. Higher drying temperature may be used resulting in a dry cathode coating which resists cracking. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: GrantFiled: May 23, 2008Date of Patent: October 14, 2014Assignee: The Gillette CompanyInventors: Maya Stevanovic, Michael Pozin, Yelena Kouznetsova, Steven J. Specht, Fred J. Berkowitz
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Patent number: 8591604Abstract: A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.Type: GrantFiled: September 12, 2012Date of Patent: November 26, 2013Assignee: The Gillette CompanyInventors: Fred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
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Publication number: 20130004816Abstract: A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.Type: ApplicationFiled: September 12, 2012Publication date: January 3, 2013Applicant: THE GILLETTE COMPANYInventors: Fred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
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Patent number: 8298695Abstract: A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.Type: GrantFiled: June 8, 2010Date of Patent: October 30, 2012Assignee: The Gillette CompanyInventors: Fred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
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Patent number: 8142918Abstract: This disclosure relates to methods of making a cathode for a lithium battery. The batteries include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.Type: GrantFiled: June 1, 2011Date of Patent: March 27, 2012Assignee: The Gillette CompanyInventors: Christopher Boczer, Frank M. Delnick, Rosario Del Rosauro, Minkoo Kang, Lucyna M. Pawlowska, Michael Pozin, Dharmendra Rana, Maya Stevanovic, John J. Weckesser
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Patent number: 8076028Abstract: A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2), iron sulfide (FeS) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture. A cathode slurry is prepared comprising iron disulfide (FeS2) powder, iron sulfide (FeS) powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: GrantFiled: April 16, 2008Date of Patent: December 13, 2011Assignee: The Gillette CompanyInventors: Barry D. Josephs, Michael Pozin, Zhiping Jiang, Maya Stevanovic, Fred J. Berkowitz, Yelena Kouznetsova, Steven J. Specht
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Patent number: 8062788Abstract: A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a nonaqueous solvent mixture which contains an additive, preferably iodine, suppressing voltage delay. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: GrantFiled: September 11, 2009Date of Patent: November 22, 2011Assignee: The Gillette CompanyInventors: Nikolai N. Issaev, Michael Pozin, Maya Stevanovic
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Publication number: 20110254509Abstract: This disclosure relates to methods of making a cathode for a lithium batter. The batterys include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.Type: ApplicationFiled: June 1, 2011Publication date: October 20, 2011Inventors: Christopher Boczer, Frank M. Delnick, Rosauro Del Rosario, Minkoo Kang, Lucyna M. Pawlowska, Michael Pozin, Dharmendra Rana, Maya Stevanovic, John J. Weckesser
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Patent number: 7967875Abstract: This disclosure relates to methods of making a cathode for a lithium batter. The methods include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.Type: GrantFiled: June 1, 2010Date of Patent: June 28, 2011Assignee: The Gillette CompanyInventors: Christopher Boczer, Frank M. Delnick, Rosauro Del Rosario, Minkoo Kang, Lucyna M. Pawlowska, Michael Pozin, Dharmendra Rana, Maya Stevanovic, John J. Weckesser
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Publication number: 20110119903Abstract: Cathodes that include an active cathode material and a binder are described. The binder includes a first polymeric material and a second material.Type: ApplicationFiled: February 1, 2011Publication date: May 26, 2011Inventor: Maya Stevanovic
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Patent number: 7867553Abstract: A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.Type: GrantFiled: August 23, 2006Date of Patent: January 11, 2011Assignee: The Gillette CompanyInventors: Fred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
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Publication number: 20100247993Abstract: A cathode includes a foil current collector including a coating containing iron disulfide on one side that covers less than 100% of the side.Type: ApplicationFiled: June 8, 2010Publication date: September 30, 2010Inventors: Fred J. Berkowitz, Bhupendra K. Patel, Maya Stevanovic
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Publication number: 20100236056Abstract: This disclosure relates to methods of making a cathode for a lithium batter. The methods include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Inventors: Christopher Boczer, Frank M. Delnick, Rosauro Del Rosario, Minkoo Kang, Lucyna M. Pawlowska, Michael Pozin, Dharmendra Rana, Maya Stevanovic, John J. Weckesser
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Patent number: 7753968Abstract: This disclosure relates to methods of making a cathode for a lithium batter. The methods include: (a) treating a cathode current collector with flame or corona; (b) coating a slurry containing iron disulfide, a first solvent, and a binder onto the cathode current collector obtained from step (a) to form a coated cathode current collector, in which the slurry contains about 73-75% by weight solids and the binder contains a polymer selected from the group consisting of linear di- and tri-block copolymers, linear tri-block copolymers cross-linked with melamine resin, ethylene-propylene copolymers, ethylene-propylene-diene terpolymers, tri-block fluorinated thermoplastics, hydrogenated nitrile rubbers, fluoro-ethylene-vinyl ether copolymers, thermoplastic polyurethanes, thermoplastic olefins, and polyvinylidene fluoride homopolymers; and (c) drying the coated cathode current collector obtained from step (b) to provide a cathode, in which the cathode contains no more than 0.Type: GrantFiled: March 23, 2009Date of Patent: July 13, 2010Assignee: The Gillette CompanyInventors: Christopher Boczer, Frank M. Delnick, Rosauro Del Rosario, Minkoo Kang, Lucyna M. Pawlowska, Michael Pozin, Dharmendra Rana, Maya Stevanovic, John J. Weckesser
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Publication number: 20100003595Abstract: A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a nonaqueous solvent mixture which contains an additive, preferably iodine, suppressing voltage delay. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: ApplicationFiled: September 11, 2009Publication date: January 7, 2010Inventors: Nikolai N. Issaev, Michael Pozin, Maya Stevanovic
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Publication number: 20090291366Abstract: A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2) or a mixture of iron disulfide (FeS2) and iron sulfide (FeS) and conductive carbon particles. A cathode slurry is prepared comprising the FeS2 or FeS2 plus FeS powder, conductive carbon, binder, and a solvent. The binder is preferably a styrene-ethylene/butylene-styrene (SEBS) block copolymer. There is an advantage discovered in utilizing a hydronaphthalene solvent to form the cathode slurry. The preferred solvent is 1,2,3,4-tetrahydronaphthalene or decahydronaphthalene and mixtures thereof. The slurry mixture is coated onto a conductive substrate and the solvent evaporated leaving a dry cathode coating on the substrate. Higher drying temperature may be used resulting in a dry cathode coating which resists cracking. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: ApplicationFiled: May 23, 2008Publication date: November 26, 2009Inventors: Maya Stevanovic, Michael Pozin, Yelena Kouznetsova, Steven J. Specht, Fred J. Berkowitz
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Publication number: 20090263727Abstract: A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2), iron sulfide (FeS) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture. A cathode slurry is prepared comprising iron disulfide (FeS2) powder, iron sulfide (FeS) powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: ApplicationFiled: April 16, 2008Publication date: October 22, 2009Inventors: Barry D. Josephs, Michael Pozin, Zhiping Jiang, Maya Stevanovic, Fred J. Berkowitz, Yelena Kouznetsova, Steven J. Specht
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Patent number: 7595133Abstract: A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a nonaqueous solvent mixture which contains an additive, preferably iodine, suppressing voltage delay. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.Type: GrantFiled: July 1, 2006Date of Patent: September 29, 2009Assignee: The Gillette CompanyInventors: Nikolai N. Issaev, Michael Pozin, Maya Stevanovic