Patents by Inventor Fred C. Norgard

Fred C. Norgard 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).

  • Manufacture of perlite insulating board on a cylinder machine
    Patent number: 4118273
    Abstract: Perlite insulation board is produced on a rotary vacuum forming machine utilizing an aqueous slurry containing ultrafine perlite particles. The fine perlite particles slow down the rate of stock deposition on the facing wire of the rotary vacuum former, and permit the rotary vacuum former to operate at a desirable forming speed.
    Type: Grant
    Filed: September 20, 1974
    Date of Patent: October 3, 1978
    Assignee: Johns-Manville Corporation
    Inventors: Gilbert Godin, Fred C. Norgard
  • Surface texture for fibrous boards
    Patent number: 3963847
    Abstract: An aesthetically pleasing texture is imparted to wet-laid fibrous mats by distributing a layer of solid expanded particles of synthetic thermoplastic resinous foamed material on the upper surface of the mat. The particles are then pressed into the wet lap to embed the particles in the fibrous material and the wet lap is subsequently heated to reduce the volume of the particles and leave depressions in the surface which result in a unique random surface texture.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: June 15, 1976
    Assignee: Johns-Manville Corporation
    Inventor: Fred C. Norgard