Patents by Inventor Thomas Patrick Concannon

Thomas Patrick Concannon 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).

  • Aqueous dispersions of perfluoroolefin polymers containing film-forming materials
    Patent number: 4087394
    Abstract: Aqueous dispersions of polymers of tetrafluoroolefin and tetrafluoroolefin/hexafluoropropylene containing other film-forming materials such as polyamide acid salts or polymeric quaternary hydroxides blended with nitrogen-resins and articles coated or impregnated with these dispersions are provided.Coatings prepared from such dispersions provide lubricity, release properties, chemical and high temperature resistance, and electrical insulation for a wide variety of substrates such as metals, ceramics and the like.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: May 2, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas Patrick Concannon
  • Aqueous solutions of polyamide acids which can be precursors of polyimide polymers
    Patent number: 4014834
    Abstract: High solids, low viscosity, stable aqueous solutions of polyamide acids, which are precursors of polyimide polymers, can be prepared from the polyamide acids, a tertiary amine, a coalescing agent such as N-methylpyrrolidone, and a viscosity reducing agent such as furfuryl alcohol. These aqueous solutions are capable of depositing a uniform film and of being cured into polyimides.
    Type: Grant
    Filed: February 4, 1975
    Date of Patent: March 29, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas Patrick Concannon