Patents by Inventor Robert L. Brost

Robert L. Brost 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).

  • Asphalt compositions
    Patent number: 4443570
    Abstract: An improved asphalt containing composition having desirable softening point and low temperature properties are prepared by incorporating into the asphalt a hydrogenated rubber, e.g., a hydrogenated styrene vinyl aromatic copolymer, a petroleum solvent, and an essentially amorphous silica.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: April 17, 1984
    Assignee: Phillips Petroleum Company
    Inventors: Homer L. Draper, Floyd H. Holland, Robert L. Brost
  • Process and apparatus for laying a subterranean film
    Patent number: 4379655
    Abstract: Improved method and means for laying a strip of film beneath the surface of the soil can include any one or more of the following: (1) method and means for starting the film; (2) method and means for centering the film in a film inlet of a plow; (4) method and means for guiding the film in a feed housing of a plow; (5) method and means for centering the film in a film distribution housing of a plow; and/or (6) method and means for supporting the film while earth is being laid down thereon.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: April 12, 1983
    Assignee: Phillips Petroleum Company
    Inventors: Robert L. Brost, Duane W. Gagle