Patents by Inventor Achuta R. Gaddipati

Achuta R. Gaddipati 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).

  • Fiber-containing composite
    Patent number: 5407734
    Abstract: 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: Grant
    Filed: October 20, 1988
    Date of Patent: April 18, 1995
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Ceramic composite containing coated fibrous material
    Patent number: 5387299
    Abstract: 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: Grant
    Filed: December 27, 1988
    Date of Patent: February 7, 1995
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Ceramic composite containing coated fibrous material
    Patent number: 5376427
    Abstract: 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: Grant
    Filed: September 4, 1990
    Date of Patent: December 27, 1994
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Fibrous material-containing composite
    Patent number: 5160676
    Abstract: 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: Grant
    Filed: November 3, 1989
    Date of Patent: November 3, 1992
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Fibrous material-containing composite
    Patent number: 5132155
    Abstract: 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: Grant
    Filed: May 17, 1991
    Date of Patent: July 21, 1992
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Fibrous material-containing composite
    Patent number: 5067998
    Abstract: 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: Grant
    Filed: December 11, 1989
    Date of Patent: November 26, 1991
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Coated fiber-containing composite
    Patent number: 5051301
    Abstract: 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: Grant
    Filed: December 8, 1989
    Date of Patent: September 24, 1991
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Ferrite body containing metallization
    Patent number: 5000909
    Abstract: A composite comprised of a sintered matrix of spinel ferrite and a non-exposed continuous phase of elemental silver or Ag-Pd alloy ranging to 25 atomic % Pd is produced by co-firing a laminated structure of ferrite powder-containing tapes containing non-exposed metallization-forming material. The composite can be formed into a composite product which contains a continuous silver or Ag-Pd alloy phase with two end portions wherein only the end portions are exposed.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: March 19, 1991
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati
  • Ferrite body containing metallization
    Patent number: 5001014
    Abstract: A composite comprised of a sintered matrix of spinel ferrite and a non-exposed continuous phase of elemental silver or Ag-Pd alloy ranging to 25 atomic % Pd is produced by co-firing a laminated structure of ferrite powder-containing tapes containing non-exposed metallization-forming material. The composite can be formed into a composite product which contains a continuous silver or Ag-Pd alloy phase with two end portions wherein only the end portions are exposed.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: March 19, 1991
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati
  • Composite containing coated fibrous material
    Patent number: 4981822
    Abstract: 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: Grant
    Filed: August 21, 1989
    Date of Patent: January 1, 1991
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Ferrite composite containing silver metallization
    Patent number: 4966625
    Abstract: A composite comprises of a sintered matrix of spinel ferrite and an electrically conductive phase of elemental silver is produced by co-firing a laminated structure of ferrite powder-containing tapes containing a silver metallization-forming material having two end portions wherein only the end portions are exposed.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: October 30, 1990
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati
  • Zinc oxide varistor structure
    Patent number: 4959262
    Abstract: A varistor device comprised of a multi-layer zinc oxide varistor matrix containing metallizations of silver.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: September 25, 1990
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati
  • Method of obtaining a filament-containing composite with a boron nitride coated matrix
    Patent number: 4931311
    Abstract: 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: Grant
    Filed: December 21, 1987
    Date of Patent: June 5, 1990
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Method of producing a coated fiber-containing composite
    Patent number: 4915760
    Abstract: 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: Grant
    Filed: October 26, 1988
    Date of Patent: April 10, 1990
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Composite containing coated fibrous material
    Patent number: 4889686
    Abstract: 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: Grant
    Filed: February 17, 1989
    Date of Patent: December 26, 1989
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Process for producing a filament-containing composite in a ceramic matrix
    Patent number: 4886682
    Abstract: 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 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 filaments.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: December 12, 1989
    Assignee: General Electric Company
    Inventors: Raj N. Singh, Achuta R. Gaddipati
  • Method of making a ferrite composite containing silver metallization
    Patent number: 4880599
    Abstract: A composite comprised of a sintered matrix of spinel ferrite and an electrically conductive phase of elemental silver is produced by co-firing a laminated structure of ferrite powder-containing tapes containing a silver metallization-forming material having two end portions wherein only the end portions are exposed.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: November 14, 1989
    Assignee: General Electric Company
    Inventors: Richard J. Charles, Achuta R. Gaddipati