Patents by Inventor Paul A. Petkus

Paul A. Petkus 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).

  • Single package zinc-rich coatings
    Patent number: 4571268
    Abstract: The invention relates to a single package zinc-filled coating particularly useful as applied to metal substrates. The zinc-rich coatings comprise mixtures of partially hydrolyzed ethyl silicate with large amounts of metal particles such as zinc dust in an organic solvent with an alkali metal nitrate as the catalyst. The coating compositions are substantially stable in the absence of moisture and therefore having a long shelf life and can be applied by conventional methods to obtain completely cured films under ambient conditions.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: February 18, 1986
    Assignee: The Sherwin Williams Company
    Inventors: Laura M. Frain, Paul A. Petkus