Patents by Inventor Van A. Stewart

Van A. Stewart 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).

  • Oxyaluminum acylate containing emulsion compositions and use
    Patent number: 5104447
    Abstract: Aqueous compositions of emulsified oxyaluminum acylate solutions comprising solutions of oxyaluminum acylate in a largely water insoluble solvent, an alcohol or an organic acid, an emulsifier or mixture of emulsifiers, and water are provided. Articles comprising substrates rendered water-repellent with such emulsions are provided as well. A process for the preparation of such articles is also provided.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: April 14, 1992
    Assignee: PCR Group Inc.
    Inventors: Van A. Stewart, Donald R. Varina, Michael E. Wilson