Patents by Inventor Rita D. Pietruszka

Rita D. Pietruszka 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).

  • Polyacetoacetate-containing epoxy resin compositions
    Patent number: 5021537
    Abstract: A coating composition is provided comprising an epoxy resin, a polyacetoacetate, a curing agent for the epoxy resin, and an optional organic solvent. The presence of the polyacetoacetate permits the preparation of a fast-drying high-solids coating formulation.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: June 4, 1991
    Assignee: Shell Oil Company
    Inventors: Charles J. Stark, Rita D. Pietruszka