Patents by Inventor Donald R. Cushman

Donald R. Cushman 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).

  • Controlled deposition of asphalt emulsions
    Patent number: 4194023
    Abstract: There is provided a method for depositing asphalt from an asphalt emulsion onto an aggregate, as in road construction. Prior to applying the asphalt emulsion, the aggregate is wetted down with water containing a minor amount of an anionic or a cationic coupling agent selected to have a charge opposite to that of the asphalt emulsion.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: March 18, 1980
    Assignee: Mobil Oil Corporation
    Inventors: Donald R. Cushman, Charles A. Pagen, John W. Schick
  • Asphalt composition and its manufacture
    Patent number: 4105612
    Abstract: Asphaltic compositions are provided comprising a major proportion of straight-run asphalt, and minor proportions of a refractory aromatic residual fraction (syntower bottoms), ethylene-vinyl acetate copolymer and terpenic resin.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: August 8, 1978
    Assignee: Mobil Oil Corporation
    Inventors: Donald R. Cushman, Charles A. Pagen, John W. Schick, Tsoung-Yuan Yan
  • Asphalt compositions
    Patent number: 4052290
    Abstract: Improved asphalt compositions are provided which are produced by forming a homogeneous blend of marginal asphalt stock with coal-derived asphaltenes, and air-blowing the homogeneous blend to yield an asphalt composition having a viscosity-penetration index higher than about 2.5 .times. 10.sup.5.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: October 4, 1977
    Assignee: Mobil Oil Corporation
    Inventors: Donald R. Cushman, Charles A. Pagen, John W. Schick, Tsoung-Yuan Yan