Patents by Inventor Paul E. Donahue

Paul E. Donahue 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 cyclic polyformals
    Patent number: 4136087
    Abstract: A method is provided for making aromatic cyclic polyformals by effecting reaction between a methylene halide and an anhydrous bisphenol dianion, followed by a precipitation and an extraction of the resulting aromatic polyformal reaction product. The aromatic cyclic polyformals can be used as plasticizers for organic polymers for making wire coating formulations.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: January 23, 1979
    Assignee: General Electric Company
    Inventors: Frank J. Williams, III, Paul E. Donahue
  • Polysulfoneimides
    Patent number: 4107147
    Abstract: Polysulfoneimides are provided and a method for making such materials. Aromatic bis(sulfoneanhydrides) are reacted with organic diamines to yield polymers which are useful in high temperature applications.
    Type: Grant
    Filed: September 2, 1977
    Date of Patent: August 15, 1978
    Assignee: General Electric Company
    Inventors: Frank J. Williams, III, Paul E. Donahue
  • Aromatic disulfone dianhydrides
    Patent number: 4102905
    Abstract: There are provided bis(sulfone) aromatic dianhydrides and methods for making these materials. These aromatic disulfone dianhydrides can be used to make polyimides and polyesters, and can be used as curing agents for epoxy resins.
    Type: Grant
    Filed: September 2, 1977
    Date of Patent: July 25, 1978
    Assignee: General Electric Company
    Inventors: Frank J. Williams, III, Paul E. Donahue
  • Novel polyetherimides
    Patent number: 3983093
    Abstract: This invention is concerned with a new class of polyetherimides. More particularly, the invention is concerned with polyetherimides derived from the reaction of an organic diamine, a bisphenol dianhydride and a dianhydride selected from the class consisting of pyromellitic dianhydride, a sulfur dianhydride, and a benzophenone dianhydride. The polyetherimide compositions have improved solvent resistance which enhances their value in a wide variety of uses including films, molding compounds, coatings, etc.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: September 28, 1976
    Assignee: General Electric Company
    Inventors: Frank J. Williams, III, Paul E. Donahue