Patents by Inventor Glenn Pfendt

Glenn Pfendt 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).

  • Water-resistant porcelain enamel coatings and method of manufacturing same
    Patent number: 7410672
    Abstract: A water-resistant porcelain enamel coating and method of making the same is provided. The porcelain enamel coating is prepared using a borosilicate glass frit, and mill additions of silica and a zirconia compound. The mixture is applied to a metal substrate and fired, resulting in a water-resistant coating that resists cracking and crazing. The coating is particularly useful in water heaters. In one embodiment, the coating comprises a fine zirconia compound having a median particle size of less than 10 microns.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: August 12, 2008
    Assignee: AOS Holding Company
    Inventors: James D Waters, Ray O. Knoeppel, Glenn Pfendt