Patents by Inventor David J. Tetzlaf

David J. Tetzlaf 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).

  • Partial interpenetrating networks of polymers
    Patent number: 6022925
    Abstract: A process for producing a coating compositions for use over chalky substrates comprising a partial interpenetrating network of a polyurethane component and a waterborne polymer component, wherein the polyurethane component is prepared in the presence of the waterborne polymer component.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: February 8, 2000
    Assignee: The Sherwin-Williams Company
    Inventors: Revathi R. Tomko, Louisa D. DiCola, Lorette Madigan, David J. Tetzlaf