Patents by Inventor Frederick J. Spaeth

Frederick J. Spaeth 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).

  • Alkaline aqueous coating solution and process
    Patent number: 4485131
    Abstract: Aqueous alkaline coating compositions for metal substrates comprising a water soluble salt of an acrylic polymer which contains carboxyl groups, a divalent metal ion, a volatile base and a defoamer. The acrylic polymer is present in the coating composition in an amount greater than about 0.25 gm/liter and less than about 5.0 gm/liter.
    Type: Grant
    Filed: March 4, 1983
    Date of Patent: November 27, 1984
    Assignee: Pennwalt Corporation
    Inventors: Richard G. Adams, Kurt Goltz, Frederick J. Spaeth