Patents by Inventor Thomas L. Guggenheim

Thomas L. Guggenheim 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).

  • Polyetherimide bisphenol compositions
    Patent number: 4757150
    Abstract: Polyetherimide bisphenols and bischloroformates are prepared by the reaction of dianhydrides or certain bisimides with aminophenols or mixtures thereof with diamines. They are useful as intermediates for the preparation of cyclic heterocarbonates, which may in turn be converted to linear copolycarbonates. The bisphenols can also be converted to salts which react with cyclic polycarbonate oligomers to form block copolyetherimidecarbonates.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: July 12, 1988
    Assignee: General Electric Company
    Inventors: Thomas L. Guggenheim, Joseph W. Guiles, John W. Verbicky, Jr.
  • Method for making tetrahydroxydiphenylsulfide and product obtained therefrom
    Patent number: 4714780
    Abstract: Thiobisphenols, such as 2,2-bis[2,2-bis(4-hydroxyphenyl)propane]-sulfide are provided by effecting reaction betwen a dihydric phenol such as bisphenol-A and sulfur dichloride in the presence of an effective amount of a Lewis acid catalyst and organic solvent.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: December 22, 1987
    Assignee: General Electric Company
    Inventor: Thomas L. Guggenheim
  • Cyclic heterocarbonates and methods for their preparation and use
    Patent number: 4696998
    Abstract: Cyclic heterocarbonates containing linkages such as ester, urethane, imide, ether sulfone, ether ketone or amide may be prepared from the corresponding bishaloformates. They may be converted to linear copolycarbonates.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: September 29, 1987
    Assignee: General Electric Company
    Inventors: Daniel J. Brunelle, Thomas L. Guggenheim, Eugene P. Boden, Thomas G. Shannon, Joseph W. Guiles