Patents by Inventor Robert P. Hirt, Jr.

Robert P. Hirt, Jr. 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).

  • Multilayer composites comprising polyetherimide layers adjacent to polycarbonate or copolyester carbonate layers
    Patent number: 4737414
    Abstract: A composition comprising a multilayer composite wherein a layer comprising an aromatic polyetherimide is adjacent to a layer comprising an aromatic polyester.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: April 12, 1988
    Assignee: General Electric Company
    Inventors: Robert P. Hirt, Jr., James M. Mihalich, Richard T. Rische
  • Multilayer structure having at least one polycarbonate layer
    Patent number: 4734331
    Abstract: A multilayer composition comprising at least one polycarbonate layer, at least one polyolefin layer, and at least one olefin vinyl alcohol layer, said layers being adhered together by means of tie layers containing a tie material selected from modified polyolefin graft copolymers and olefin vinyl ester copolymers.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: March 29, 1988
    Assignee: General Electric Company
    Inventors: Harold F. Giles, Jr., Robert P. Hirt, Jr.
  • Polycarbonate compositions
    Patent number: 4657972
    Abstract: A multilayer composition comprising at least one polycarbonate layer, at least one polyolefin layer, and at least one olefin vinyl alcohol layer, said layers being adhered together by means of tie layers containing a tie material selected from modified polyolefin graft copolymers and olefin vinyl ester copolymers.
    Type: Grant
    Filed: March 28, 1986
    Date of Patent: April 14, 1987
    Assignee: General Electric Company
    Inventors: Harold F. Giles, Jr., Robert P. Hirt, Jr.
  • Multilayered structure
    Patent number: 4609592
    Abstract: A multilayered structure comprising (a) at least one layer comprised of at least one aromatic polyether imide resin, and (b) at least one layer comprised of a modified aromatic polycarbonate resin containing composition. In the instant structure the layer comprised of the aromatic polyether imide resin is adjacent and to and adhered to the layer comprised of the modified aromatic polycarbonate composition.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: September 2, 1986
    Assignee: General Electric Company
    Inventors: Ping Y. Liu, Robert P. Hirt, Jr.
  • Multilayer polycarbonate structures
    Patent number: 4608311
    Abstract: A multilayer composition comprising at least one polycarbonate layer, at least one polyolefin layer, and at least one olefin vinyl alcohol layer, said layers being adhered together by means of tie layers containing a tie material selected from modified polyolefin graft copolymers and olefin vinyl ester copolymers.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: August 26, 1986
    Assignee: General Electric Company
    Inventors: Harold F. Giles, Jr., Robert P. Hirt, Jr.
  • Polycarbonate composition
    Patent number: 4587295
    Abstract: Polycarbonate composition comprising, in physical admixture:(i) from about 10 to about 96 weight percent high molecular weight aromatic thermoplastic polycarbonate resin;(ii) from about 2 to about 35 weight percent of a olefin vinyl alcohol copolymer; and(iii) either from about 2 to about 35 weight percent of an olefin vinyl ester copolymer or from about 2 to about 90 weight percent of a polyolefin resin.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: May 6, 1986
    Assignee: General Electric Company
    Inventors: Harold F. Giles, Jr., Robert P. Hirt, Jr.
  • Polycarbonate composition
    Patent number: 4579910
    Abstract: Polycarbonate composition comprising, in physical admixture:(i) from about 10 to about 96 weight percent of at least one high molecular weight thermoplastic aromatic polycarbonate resin;(ii) from about 2 to about 35 weight percent of at least one olefin vinyl ester copolymer; and(iii) from about 2 to about 35 weight percent of at least one olefin vinyl alcohol copolymer or from about 2 to about 90 weight percent of at least one polyolefin.
    Type: Grant
    Filed: January 2, 1985
    Date of Patent: April 1, 1986
    Assignee: General Electric Company
    Inventors: Harold F. Giles, Jr, Robert P. Hirt, Jr.