Patents by Inventor Raj N. Singh
Raj N. Singh 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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Publication number: 20230102356Abstract: Disclosed are methods for providing a thin film of nanocrystalline diamond grown on 6 nm nanocrystalline diamond powder on the surface of substrates. The thin film of nanocrystalline diamond can be deposited on wide-bandgap semiconducting devices to provide heat dissipation characteristics to the semiconducting devices.Type: ApplicationFiled: September 23, 2022Publication date: March 30, 2023Inventors: Nirmal Govindaraju, Raj N. Singh
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Publication number: 20220085363Abstract: Disclosed is a composition suitable for use as an anode in a lithium ion rechargeable batter. The composition includes milled silicon powder particles and superconducting carbon particles. A carbon coat covers the surface of each milled silicon particle and encapsulates a plurality of superconducting carbon particles. Also, disclosed is a method of preparing the disclosed composition.Type: ApplicationFiled: January 6, 2020Publication date: March 17, 2022Inventors: Malay Jana, Raj N. Singh
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Publication number: 20190372117Abstract: The conventional Li-ion batteries use graphite anode, which has a theoretical specific capacity of 372 mAh/g, which limits their application for high capacity energy storage devices. Silicon has been tried because of its high theoretical specific capacity (4200 mAh/g) but the stress created due to volume expansion during intercalation of Li causes fracture and hence electrical isolation between particles and current collector leading to capacity loss. The present invention demonstrates the design of metallurgical grade polycrystalline silicon anode to achieve high reversible capacity (?1000 mAh/g) with high coulombic efficiency (99.6%), and low cost.Type: ApplicationFiled: February 22, 2018Publication date: December 5, 2019Inventors: Malay Jana, Raj N. Singh
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Patent number: 5552352Abstract: A composite is comprised of reinforcement fibers having a continuous coating with a first layer of a metal oxide wherein the metal is from the group consisting of aluminum, yttrium, titanium, zirconium, beryllium, silicon, and the rare earths, and a molten silicon infiltration formed silicon carbide matrix. The coating may have a second layer from the group consisting of rhodium, iridium, metal carbide, metal silicide, metal nitride, and metal diboride, on the metal oxide coating. The reinforcement fibers being fibers from the group consisting of elemental carbon, silicon carbide, and mixtures thereof. A process for producing the fiber reinforced composite comprises depositing on the fibers a continuous coating comprised of the first layer of the metal oxide, and the second layer. A carbonaceous material is admixed with the coated fibers so that at least 5 volume percent of the mixture is the fibers.Type: GrantFiled: September 8, 1995Date of Patent: September 3, 1996Assignee: General Electric CompanyInventors: Milivoj K. Brun, Krishan L. Luthra, Raj N. Singh
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Patent number: 5432253Abstract: A composite is produced by forming tapes comprised of a mixture of infiltration-promoting material and organic binding material, disposing a layer of boron nitride coated fibrous material between at least two of the tapes forming a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and infiltrating the resulting porous body with molten silicon.Type: GrantFiled: December 18, 1989Date of Patent: July 11, 1995Assignee: General Electric CompanyInventor: Raj N. Singh
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Patent number: 5407734Abstract: A composite is produced by depositing an organic slurry of ceramic matrix-forming material on a layer of fibrous material forming a tape therewith on drying, forming a layered structure of the tapes, laminating the structure, firing the laminated structure to burn out organic material and hot pressing the resulting porous structure to form a composite.Type: GrantFiled: October 20, 1988Date of Patent: April 18, 1995Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5387299Abstract: A composite is produced by depositing a slurry of infiltration-promoting material and organic binding material on a layer of boron nitride coated fibrous material forming a tape therewith on drying, firing the tape to burn out organic binding material and infiltrating the resulting porous body with silicon.Type: GrantFiled: December 27, 1988Date of Patent: February 7, 1995Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5376427Abstract: A composite is produced by depositing a slurry of infiltration-promoting material and organic binding material on a layer of boron nitride coated fibrous material forming a tape therewith on drying, firing the tape to burn out organic binding material and infiltrating the resulting porous body with silicon.Type: GrantFiled: September 4, 1990Date of Patent: December 27, 1994Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5330854Abstract: Boron nitride is coated on filaments of elemental carbon and/or silicon carbide, the coated filaments are contacted with an infiltration-promoting material containing elemental carbon to produce a preform wherein the filaments are substantially parallel and each filament is enveloped with infiltration-promoting material, and the preform is infiltrated with molten silicon to produce a composite containing boron nitride coated filaments.Type: GrantFiled: September 24, 1987Date of Patent: July 19, 1994Assignee: General Electric CompanyInventors: Raj N. Singh, William A. Morrison
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Patent number: 5160676Abstract: A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of fibrous material between at least two of the tapes to form a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and hot pressing the resulting porous structure to form a composite containing a layer of fibrous material.Type: GrantFiled: November 3, 1989Date of Patent: November 3, 1992Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5132155Abstract: A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of fibrous material between at least two of the tapes to form a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and hot pressing the resulting porous structure to form a composite containing a layer of fibrous material.Type: GrantFiled: May 17, 1991Date of Patent: July 21, 1992Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5067998Abstract: A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of boron nitride coated fibrous material between at least two of the tapes to form a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and hot pressing the resulting porous structure to form a composite.Type: GrantFiled: December 11, 1989Date of Patent: November 26, 1991Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5051301Abstract: A composite comprised of a ceramic matrix and a plurality of layers of boron nitride coated fibrous material, said coated fibrous material comprising at least about 10% by volume of said composite, and said matrix having a thermal expansion coefficient which ranges from lower than that of said coated fibrous material to less than about 15% higher than that of said coated fibrous material.Type: GrantFiled: December 8, 1989Date of Patent: September 24, 1991Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 5043303Abstract: Boron nitride is coated on filaments of elemental carbon and/or silicon carbide, the coated filaments are contacted with an infiltration-promoting material containing elemental carbon to produce a preform wherein the filaments are substantially parallel and each filament is enveloped with infiltration-promoting material, and the preform is infiltrated with a molten solution of boron and silicon producing a composite containing boron nitride coated filaments.Type: GrantFiled: July 8, 1988Date of Patent: August 27, 1991Assignee: General Electric CompanyInventors: Raj N. Singh, William A. Morrison
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Patent number: 5021367Abstract: Fibrous material is coated with boron nitride and a silicon-wettable material, the coated fibrous material is admixed with an infiltration-promoting material which is at least partly elemental carbon and the mixture is formed into a preform which is infiltrated with a molten solution of boron and silicon producing a composite containing boron nitride coated fibrous material.Type: GrantFiled: October 10, 1989Date of Patent: June 4, 1991Assignee: General Electric CompanyInventors: Raj N. Singh, William A. Morrison
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Patent number: 5015540Abstract: Fibrous material is coated with boron nitride and a silicon-wettable material, the coated fibrous material is admixed with an infiltration-promoting material which is at least partly elemental carbon and the mixture is formed into a preform which is infiltrated with molten silicon producing a composite containing boron nitride coated fibrous material.Type: GrantFiled: June 1, 1987Date of Patent: May 14, 1991Assignee: General Electric CompanyInventors: Marcus P. Borom, William B. Hillig, Raj N. Singh, William A. Morrison, Leonard V. Interrante
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Patent number: 4981822Abstract: A composite is produced by depositing a slurry of infiltration-promoting material and organic binding material on a layer of boron nitride coated fibrous material forming a tape therewith on drying, firing the tape to burn out organic binding material and infiltrating the resulting porous body with a solution of boron and silicon.Type: GrantFiled: August 21, 1989Date of Patent: January 1, 1991Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 4944904Abstract: Fibrous material is coated with boron nitride and a silicon-wettable material, the coated fibrous material is admixed with an infiltration-promoting material which is at least partly elemental carbon and the mixture is formed into a preform which is infiltrated with a molten solution of boron and silicon producing a composite containing boron nitride coated fibrous material.Type: GrantFiled: July 8, 1988Date of Patent: July 31, 1990Assignee: General Electric CompanyInventors: Raj N. Singh, William A. Morrison
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Patent number: 4931311Abstract: A composite is produced by admixing a matrix-forming material with organic binding material, forming the resulting mixture into a tape, disposing a layer of spaced boron nitride coated filaments between at least two of the tapes to form a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and hot pressing the resulting porous structure to form a composite containing spaced boron nitride coated filaments.Type: GrantFiled: December 21, 1987Date of Patent: June 5, 1990Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati
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Patent number: 4915760Abstract: A composite is produced by depositing an organic slurry of ceramic matrix-forming material on a layer of boron nitride coated fibrous material forming a tape therewith on drying, forming a layered structure of the tapes, laminating the structure, firing the laminated structure to burn out organic material and hot pressing the resulting porous structure to form a composite.Type: GrantFiled: October 26, 1988Date of Patent: April 10, 1990Assignee: General Electric CompanyInventors: Raj N. Singh, Achuta R. Gaddipati