Patents by Inventor Roger Alan Wallace

Roger Alan Wallace 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).

  • Porcelain enamel coating for high-carbon steel
    Patent number: 6177201
    Abstract: A porcelain enamel coating suitable for use on high-carbon content, heat-rolled sheet steel is provided. The coating includes a ground coat layer for coating directly onto the steel and a cover coat layer. The ground coat layer includes a soft ground coat frit having nickelous oxide dispersed substantially uniformly throughout. The resulting porcelain enamel coating provides good resistance to boiling defects, such as pinholes.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: January 23, 2001
    Assignee: A. O. Smith Corporation
    Inventors: Roger Alan Wallace, Ming Cheng Kuo