Patents by Inventor Bruce J. Kahara

Bruce J. Kahara 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).

  • Sag resistant, cast acoustical ceiling tile and method for making the same
    Patent number: 5753871
    Abstract: A sag resistant, cast acoustical ceiling tile which has a mineral wool core and a starch binder and which has a formaldehyde resin impregnated paper backing. A kraft paper backing which has been impregnated with a melamine formaldehyde resin has been found particularly effective in providing sag resistance in high temperature, high humidity conditions such as encountered in Pacific Rim countries. A method has been developed to manufacture the sag resistant, cast acoustical ceiling tile wherein water is applied to the paper backing prior to machining and painting to provide a tile which has a relatively flat initial plane position.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: May 19, 1998
    Assignee: USG Interiors, Inc.
    Inventors: Bruce J. Kahara, David B. Bitzan