Patents by Inventor Norman P. Bushman

Norman P. Bushman 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 using bituminous sandstone for pavement repair
    Patent number: 4964752
    Abstract: A method, apparatus and material for filling or surfacing fissures, openings and cavities in a pavement surface. The method comprises the steps of preparing a volume of water, heated to a temperature of 110-210 degrees F, and mixing a given quantity of bituminous sandstone therein in a ratio of 20 to 56% water by weight. This mixture is continuously agitated to develop a slurry which is capable of being pumped through a conduit to the repair location or site. Apparatus is disclosed for preparing the subject slurry and for enabling a continuous repair operation within a self-contained system.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: October 23, 1990
    Inventors: Myrle E. Astrope, Norman P. Bushman
  • Method and apparatus using bituminous sandstone for pavement repair
    Patent number: 4859502
    Abstract: A method, apparatus and material for filling or surfacing fissures, openings and cavities in a pavement surface. The method comprises the steps of preparing a volume of water, heated to a temperature of 110-210 degrees F., and mixing a given quantity of bituminous sandstone therein in a ratio of 20 to 56% water by weight. This mixture is continuously agitated to develop a slurry which is capable of being pumped through a conduit to the repair location or site. Apparatus is disclosed for preparing the subject slurry and for enabling a continuous repair operation within a self-contained system.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: August 22, 1989
    Inventors: Myrle E. Astrope, Norman P. Bushman