Patents by Inventor Patrick E. Gallagher

Patrick E. Gallagher 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).

  • Process for preparing polyimides
    Patent number: 4835249
    Abstract: A process for making certain polyimides involves dissolving substantially equimolar amounts of an aromatic dianhydride and an organic diamine in a high-boiling, aprotic solvent, heating the reaction solution to form an insoluble polyimide prepolymer and to distill out water of reaction, separating the solid polyimide prepolymer and melt polymerizing the polyimide prepolymer to form the desired polyimide.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: May 30, 1989
    Assignee: General Electric Company
    Inventors: Patrick E. Gallagher, Ronald A. Greenberg
  • Silicone-polyimides, and method for making
    Patent number: 4808686
    Abstract: Silicone-polyimides having improved flexibility can be obtained, by sequentially intercondensing organic diamine, aminoorgano terminated polydiorganosiloxane and aromatic bisanhydride. A decrease in flexural modulus and an increase in elongation percent is effected while flame retardance remains substantially unchanged.
    Type: Grant
    Filed: June 18, 1987
    Date of Patent: February 28, 1989
    Assignee: General Electric Company
    Inventors: James A. Cella, Patrick E. Gallagher, Gary K. Shank
  • Process for the production of a random copolymer containing repeating polyimide units and repeating polyetherimide units
    Patent number: 4680373
    Abstract: The present invention provides a process for the production of random copolymers containing repeating polyimide units and repeating polyetherimide units. The process is a reverse addition process and utilizes at least two dianhydrides of varying reactivity.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: July 14, 1987
    Assignee: General Electric Company
    Inventors: Patrick E. Gallagher, Ronald A. Greenberg
  • Polyetherimide copolymers
    Patent number: 4550156
    Abstract: This invention is concerned with a new class of polyetherimide copolymers. More particularly, the invention is concerned with polyetherimide copolymers containing polyetherimide repeating units and repeating polyimide units. The polyetherimide compositions have improved solvent resistance and good heat properties.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: October 29, 1985
    Assignee: General Electric Company
    Inventor: Patrick E. Gallagher