Patents by Inventor Joseph B. Byrne

Joseph B. Byrne 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).

  • Blends of a polycarbonate with a polyester-polycarbonate copolymer
    Patent number: 4710548
    Abstract: Blends of aromatic polyestercarbonate copolymers with aromatic polycarbonate resins provide improved low temperature toughness while maintaining tensile strength essentially equivalent to the polycarbonate component. Particularly preferred components are polycarbonates of bisphenol A and a polyestercarbonate derived from bisphenol A, phosgene and terephthaloyl and isophthaloyl chlorides.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: December 1, 1987
    Assignee: The Dow Chemical Company
    Inventor: Joseph B. Byrne
  • Flame retardant polycarbonates
    Patent number: 4408005
    Abstract: Flame retardant polycarbonate compositions are prepared from dihydric aromatic compounds and alkali metal hydrogen sulfite. These compositions are more effective than similar compositions containing alkali metal sulfites.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: October 4, 1983
    Assignee: The Dow Chemical Company
    Inventor: Joseph B. Byrne
  • Copolycarbonates of phenolphthalein polycarbonates and other polycarbonates
    Patent number: 4134936
    Abstract: Novel copolycarbonates exhibiting generally improved impact resistance, clarity and flame resistance are prepared by blending a polycarbonate of a trityldiol such as phenolphthalein and a polycarbonate of another diol such as bisphenol-A under conditions of temperature and/or shear sufficient to cause reaction of the polycarbonates.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: January 16, 1979
    Assignee: The Dow Chemical Company
    Inventors: Joseph B. Byrne, Christian A. Weber