Patents by Inventor Royce K. Harker

Royce K. Harker 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).

  • Post-press embossing of a consolidated man-made board
    Patent number: 4169748
    Abstract: A consolidated man-made board, such as hardboard, is "post-press" embossed with a contoured embossing plate at a pressure of at least about 1000 psi, at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently re-shape the surface of the consolidated board.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: October 2, 1979
    Assignee: Masonite Corporation
    Inventors: John T. Clarke, Royce K. Harker, Michael E. Hittmeier, James W. Eaton
  • Post-press embossing of a consolidated man-made board
    Patent number: 4073672
    Abstract: A consolidated man-made board, such as hardboard, is wetted on one surface with a chemical, such as ammonium hydroxide, and thereafter embossed with a contoured embossing plate at a pressure of at least about 1000 p.s.i., at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently reshape the surface of the consolidated board. The use of chemical wetting agents including ammonium hydroxide, mineral acids including hydrochloric, sulfuric, nitric and phosphoric acids, oxalic acid, and metheneamine is disclosed.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: February 14, 1978
    Assignee: Masonite Corporation
    Inventors: John T. Clarke, Royce K. Harker, Michael E. Hittmeier, James W. Eaton
  • Post-press embossing of a consolidated man-made board
    Patent number: 4007076
    Abstract: A consolidated man-made board, such as hardboard, is wetted on one surface and thereafter embossed with a contoured embossing plate at a pressure of at least about 1000 p.s.i., at a temperature in the range of about 400.degree.-550.degree. F. and for a period of time sufficient to permanently re-shape the surface of the consolidated board.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: February 8, 1977
    Assignee: Masonite Corporation
    Inventors: John T. Clarke, Royce K. Harker, Michael E. Hittmeier, James W. Eaton