Patents by Inventor Jerald A. Scherger

Jerald A. Scherger 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).

  • Method and apparatus for extruding bingham plastic-type materials
    Patent number: 5304331
    Abstract: The present invention relates to an apparatus and method for extruding a Bingham plastic-type material through a die having an auger rotationally mounted therein.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: April 19, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William K. Leonard, Donley D. Rowenhorst, Jerald A. Scherger, Donald R. Winberg
  • Abrasive grain, method of making same and abrasive products
    Patent number: 5213591
    Abstract: An improved abrasive grain comprising the sintered product of a porous non-sintered particle having a coating of inorganic material thereon is provided. A preferred method of making such abrasive grains comprises coating the porous base particles with inorganic particles. The preferred step of coating comprises a step of mixing the base particles with a suspension containing the inorganic particles in a carrier fluid. The porous base particles having the coating of inorganic particles thereon are sintered, to generate the ceramic abrasive grain product. The abrasive grains may be incorporated, to advantage, in a variety of abrasive products including for example bonded abrasives, nonwoven abrasive products and coated abrasive products.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: May 25, 1993
    Inventors: Ahmet Celikkaya, Jerald A. Scherger, Vernon M. Wald