Patents by Inventor Richard P. Joyce

Richard P. Joyce 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).

  • Method for making aromatic carbonates
    Patent number: 5231210
    Abstract: A method is provided for making diphenyl carbonate by the direct carbonylation of phenol utilizing a palladium catalyst in combination with an inorganic cocatalyst in the form of a cobalt pentadentate complex.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: July 27, 1993
    Assignee: General Electric Company
    Inventors: Richard P. Joyce, Joseph A. King, Jr., Eric J. Pressman
  • Thermoplastic polyarylate compositions having improved oxygen barrier properties
    Patent number: 5051490
    Abstract: Aromatic thermoplastic polyarylates containing structural units derived from a bisphenol of cyclohexanone, preferably 1,1-bis(4-hydroxy-3-methylphenyl)cyclohexane, and an aromatic dicarboxylic acid or mixture of such acids, are provided which exhibit improved oxygen barrier properties.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: September 24, 1991
    Assignee: General Electric Company
    Inventors: Richard P. Joyce, John C. Schmidhauser, Kathryn L. Longley
  • Preparation of spirobiindane polyarylates, and spirobiindane polyarylate-polyethylene terephthalate copolymers, via melt polymerization
    Patent number: 4853457
    Abstract: The preparation of spirobiindane polyarylate compositions having reduced cyclic oligomer formation and glass transition temperature which can be varied depending upon the percent composition of linear diacids and linear dihydric phenols present therein. Spirobiindane polyarylate-polyester copolymers and methods for their preparation are also disclosed.
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: August 1, 1989
    Assignee: General Electric Company
    Inventor: Richard P. Joyce