Patents by Inventor Paul J. Prucnal

Paul J. Prucnal 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).

  • Sealer-primer for elastomeric coatings
    Patent number: 3962369
    Abstract: Compositions useful as sealing primers for elastomeric coatings comprise (A) the reaction product of a polyurethane polyol and a polycarboxylic acid or acid anhydride, and (B) an aminoplast resin. When used as primers, the compositions of the instant invention increase the durability, gloss retention and adhesion of elastomeric coatings. Such primers are particularly useful on resilient and rubbery substrates such as EPDM rubber, foam rubber, polyurethane foam and vinyl foam.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: June 8, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, Roger L. Scriven, Paul J. Prucnal