Patents by Inventor Sumeet Bhargava
Sumeet Bhargava 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: 9444107Abstract: A method of making an electrode ink containing nanostructured catalyst elements is described. The method comprises providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon, the nanostructure thin catalytic layer comprising nanostructured catalyst elements; providing a transfer substrate with an adhesive thereon; transferring the nanostructured thin catalytic layer from the carrying substrate to the transfer substrate; removing the nanostructured catalyst elements from the transfer substrate; providing an electrode ink solvent; and dispersing the nanostructured catalyst elements in the electrode ink solvent. Electrode inks, coated substrates, and membrane electrode assemblies made from the method are also described.Type: GrantFiled: May 30, 2013Date of Patent: September 13, 2016Assignee: GM Global Technology Operations LLCInventors: Chunxin Ji, Sumeet Bhargava, Matthew Dioguardi
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Patent number: 9076998Abstract: Fuel-cell membrane-subgasket assemblies may include an electrolyte membrane and a coated subgasket overlying the electrolyte membrane around a perimeter of the electrolyte membrane so as to define an active area inside the perimeter. The coated subgasket may comprise a subgasket body formed from a subgasket material. At least one side of the coated subgasket includes a subgasket coating layer containing or formed from a coating material such as metals, ceramics, polymers, polymer composites, or other hard coatings. Fuel-cell assemblies may include gas diffusion media, a bipolar plate, and a fuel-cell membrane-subgasket assembly having a coated subgasket. Fuel-cell stacks may include clamping plates, unipolar endplates, and a plurality of individual fuel-cell assemblies, at least one of which includes a fuel-cell membrane-subgasket assembly having a coated subgasket.Type: GrantFiled: September 12, 2012Date of Patent: July 7, 2015Assignee: GM Global Technology Operations LLCInventors: Gerald W. Fly, Sumeet Bhargava, James Leistra, Gayatri Vyas Dadheech
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Publication number: 20140072899Abstract: Fuel-cell membrane-subgasket assemblies may include an electrolyte membrane and a coated subgasket overlying the electrolyte membrane around a perimeter of the electrolyte membrane so as to define an active area inside the perimeter. The coated subgasket may comprise a subgasket body formed from a subgasket material. At least one side of the coated subgasket includes a subgasket coating layer containing or formed from a coating material such as metals, ceramics, polymers, polymer composites, or other hard coatings. Fuel-cell assemblies may include gas diffusion media, a bipolar plate, and a fuel-cell membrane-subgasket assembly having a coated subgasket. Fuel-cell stacks may include clamping plates, unipolar endplates, and a plurality of individual fuel-cell assemblies, at least one of which includes a fuel-cell membrane-subgasket assembly having a coated subgasket.Type: ApplicationFiled: September 12, 2012Publication date: March 13, 2014Applicant: GM Global Technology Operations LLCInventors: Gerald W. Fly, Sumeet Bhargava, James Leistra, Gayatri Vyas Dadheech
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Publication number: 20130260278Abstract: A method of making an electrode ink containing nanostructured catalyst elements is described. The method comprises providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon, the nanostructure thin catalytic layer comprising nanostructured catalyst elements; providing a transfer substrate with an adhesive thereon; transferring the nanostructured thin catalytic layer from the carrying substrate to the transfer substrate; removing the nanostructured catalyst elements from the transfer substrate; providing an electrode ink solvent; and dispersing the nanostructured catalyst elements in the electrode ink solvent. Electrode inks, coated substrates, and membrane electrode assemblies made from the method are also described.Type: ApplicationFiled: May 30, 2013Publication date: October 3, 2013Inventors: Chunxin Ji, Sumeet Bhargava, Matthew Dioguardi
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Patent number: 8481231Abstract: A method of making an electrode ink containing nanostructured catalyst elements is described. The method comprises providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon, the nanostructure thin catalytic layer comprising nanostructured catalyst elements; providing a transfer substrate with an adhesive thereon; transferring the nanostructured thin catalytic layer from the carrying substrate to the transfer substrate; removing the nanostructured catalyst elements from the transfer substrate; providing an electrode ink solvent; and dispersing the nanostructured catalyst elements in the electrode ink solvent. Electrode inks, coated substrates, and membrane electrode assemblies made from the method are also described.Type: GrantFiled: February 5, 2010Date of Patent: July 9, 2013Assignee: GM Global Technology Operations LLCInventors: Chunxin Ji, Sumeet Bhargava, Matthew Dioguardi
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Patent number: 8445164Abstract: A method of making an electrode is provided. The method includes providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon; providing a transfer substrate with an adjacent adhesive layer; adhering the nanostructured thin catalytic layer adjacent to the adhesive layer to form a composite structure; removing the carrying substrate from the composite structure; and removing the transfer substrate from the composite structure to form the stand-alone nanostructured thin catalytic film comprising the adhesive layer with the nanostructured thin catalytic layer adhered thereto. A stand alone nanostructured thin catalytic film and methods of constructing electrodes with the stand alone nanostructured thin catalytic films are also described.Type: GrantFiled: May 27, 2010Date of Patent: May 21, 2013Assignee: GM Global Technology Operations LLCInventors: Chunxin Ji, Matthew Dioguardi, Sumeet Bhargava
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Patent number: 8399150Abstract: An integrated fuel cell assembly is described. The integrated fuel cell assembly includes a polymer membrane; an anode electrode and a cathode electrode on opposite sides of the polymer membrane; a pair of gas diffusion media on opposite sides of the polymer membrane, the gas diffusion media comprising a microporous layer and a gas diffusion layer, the anode electrode and the cathode electrode positioned between the polymer membrane and the pair of gas diffusion media; a subgasket positioned around a perimeter of one of the gas diffusion media, the subgasket defining an active area inside the perimeter, the subgasket having a layer of thermally activated adhesive thereon; and a bipolar plate sealed to the subgasket by the layer of thermally activated adhesive. Methods of making the integrated fuel cell assembly and assembling fuel cell stacks are also described.Type: GrantFiled: June 23, 2010Date of Patent: March 19, 2013Assignee: GM Global Technology Operations LLCInventors: Daniel P. Miller, Matthew J. Beutel, Sumeet Bhargava, Courtney E. Reich
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Publication number: 20110318667Abstract: An integrated fuel cell assembly is described. The integrated fuel cell assembly includes a polymer membrane; an anode electrode and a cathode electrode on opposite sides of the polymer membrane; a pair of gas diffusion media on opposite sides of the polymer membrane, the gas diffusion media comprising a microporous layer and a gas diffusion layer, the anode electrode and the cathode electrode positioned between the polymer membrane and the pair of gas diffusion media; a subgasket positioned around a perimeter of one of the gas diffusion media, the subgasket defining an active area inside the perimeter, the subgasket having a layer of thermally activated adhesive thereon; and a bipolar plate sealed to the subgasket by the layer of thermally activated adhesive. Methods of making the integrated fuel cell assembly and assembling fuel cell stacks are also described.Type: ApplicationFiled: June 23, 2010Publication date: December 29, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Daniel P. Miller, Matthew J. Beutel, Sumeet Bhargava, Courtney E. Reich
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Publication number: 20110294037Abstract: A method of making an electrode is provided. The method includes providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon; providing a transfer substrate with an adjacent adhesive layer; adhering the nanostructured thin catalytic layer adjacent to the adhesive layer to form a composite structure; removing the carrying substrate from the composite structure; and removing the transfer substrate from the composite structure to form the stand-alone nanostructured thin catalytic film comprising the adhesive layer with the nanostructured thin catalytic layer adhered thereto. A stand alone nanostructured thin catalytic film and methods of constructing electrodes with the stand alone nanostructured thin catalytic films are also described.Type: ApplicationFiled: May 27, 2010Publication date: December 1, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Chunxin Ji, Matthew Dioguardi, Sumeet Bhargava
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Publication number: 20110171562Abstract: A UEA-subgasket assembly for a fuel cell system and a method of production thereof is disclosed. The UEA-subgasket assembly includes a membrane electrolyte assembly, diffusion media, and a subgasket, wherein the subgasket permeates into one of the diffusion media to form a substantially fluid-tight seal.Type: ApplicationFiled: January 8, 2010Publication date: July 14, 2011Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Michael K. Budinski, Sumeet Bhargava, Brian K. Brady, Lewis Dipietro
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Publication number: 20100291461Abstract: A method of making an electrode ink containing nanostructured catalyst elements is described. The method comprises providing an electrocatalyst decal comprising a carrying substrate having a nanostructured thin catalytic layer thereon, the nanostructure thin catalytic layer comprising nanostructured catalyst elements; providing a transfer substrate with an adhesive thereon; transferring the nanostructured thin catalytic layer from the carrying substrate to the transfer substrate; removing the nanostructured catalyst elements from the transfer substrate; providing an electrode ink solvent; and dispersing the nanostructured catalyst elements in the electrode ink solvent. Electrode inks, coated substrates, and membrane electrode assemblies made from the method are also described.Type: ApplicationFiled: February 5, 2010Publication date: November 18, 2010Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Chunxin Ji, Sumeet Bhargava, Matthew Dioguardi