Patents by Inventor Donald F. Claussen

Donald F. Claussen 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: 5231810
    Abstract: The invention is a ceiling board with a factory cut aperture therein. The edges of the ceiling board and/or the edges of a design cut in the face of the board are of the same or compatible design to that of the edge(s) of the aperture.
    Type: Grant
    Filed: April 23, 1992
    Date of Patent: August 3, 1993
    Assignee: Armstrong World Industries, Inc.
    Inventors: Barry Buhay, Walter W. Chamberlain, III, Donald F. Claussen
  • Patent number: 5165209
    Abstract: The invention is directed to a transition element for use between an upper ceiling level and a lower ceiling level to form a two-level or multi-level ceiling. The transition element has a configured surface, particularly a curved surface. The transition element is mounted with the top of the curved surface located adjacent the plane of the upper ceiling level and the bottom of the curved surface being located in the plane of the lower ceiling level so that the curved surface forms a transition surface between the two ceiling levels. The transition element is held in position by the ceiling runners used to hold the ceiling boards in position.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: November 24, 1992
    Assignee: Armstrong World Industries, Inc.
    Inventors: Wesley T. K. Bischel, Donald F. Claussen, Martin L. Graver, James F. Mathis
  • Patent number: 4109305
    Abstract: The light fixture herein can assume multi-angle relationships to the ceiling grid system within a suspended ceiling system. The light fixture is suspended from the ceiling by support posts and the support posts are movable relative the grid system of the ceiling system and the back of the light fixture to permit the light fixture to be moved to a number of different locations.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: August 22, 1978
    Assignee: Armstrong Cork Company
    Inventors: Donald F. Claussen, Ronald A. Gagnon