Patents by Inventor Allen R. Knauer

Allen R. Knauer 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).

  • Patent number: 4800101
    Abstract: A method for restoring and preserving bronze gravestones is disclosed and calls first for cleaning the surface to remove any scale or corrosion present by applying a dilute acid solution to the bronze surface. Then, any raised features are roughly polished after which the entire surface is coated with marker stain which will ultimately provide a contrasting background to the raised features. After the marker stain has dried, it is selectively removed from the raised features which are then further polished with fine steel wool. A clear lacquer finish is applied over the surface and allowed to thoroughly dry, preferably overnight. The restoration process is completed by applying a unique liquid preservative mixture to the metal surface. One preferred embodiment of the preservative contains, by weight: paraffin--19%, mineral spirits--70%, lemon oil--3% and silicone--8% although other proportions are discussed and contemplated.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: January 24, 1989
    Inventor: Allen R. Knauer
  • Patent number: D301792
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: June 20, 1989
    Inventor: Allen R. Knauer