Patents by Inventor Dennis Simpson

Dennis Simpson 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).

  • Liquid crosslinkable compositions using polyepoxides and polyacids
    Patent number: 4703101
    Abstract: A crosslinkable composition comprising a polyepoxide and a polyacid which is the half-ester formed from reacting an acid anhydride with a polyol is disclosed. The compositions are useful as coatings, particularly as clear coats in color-plus-clear coatings.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: October 27, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Debra L. Singer, Rostyslaw Dowbenko, Dennis A. Simpson
  • Color plus clear coatings employing polyepoxides and polyacid curing agents in the clear coat
    Patent number: 4681811
    Abstract: A color-plus-clear coating system is disclosed. A pigmented or colored base coat is first applied to a substrate followed by the application of a transparent top coat to the base coat. The transparent top coat composition is a liquid crosslinkable composition comprising a polyepoxide and a polyacid curing agent. The polyepoxide-polyacid curing agent in the transparent top coat provides a composite coating with outstanding gloss and distinctness of image making the composite coating particularly useful as an automotive top coat.
    Type: Grant
    Filed: March 7, 1986
    Date of Patent: July 21, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Dennis A. Simpson, Debra L. Singer, Rostyslaw Dowbenko, William P. Blackburn, Charles M. Kania
  • Color plus clear coatings employing polyepoxides and polyacid curing agents
    Patent number: 4650718
    Abstract: A color-plus-clear coating system is disclosed. A pigmented or colored base coat is first applied to a substrate followed by the application of a transparent top coat to the base coat. Either the transparent top coat, the base coat or both the top coat and base coat compositions are crosslinkable compositions comprising a polyepoxide and a polyacid curing agent which comprises a half-ester formed from reacting an acid anhydride with a polyol. The polyepoxide-polyacid curing agent in the transparent top coat provides a composite coating with outstanding gloss and distinctness of image making the composite coating particularly useful as an automotive top coat.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: March 17, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Dennis A. Simpson, Debra L. Singer, Rostyslaw Dowbenko, William P. Blackburn, Charles M. Kania