Patents by Inventor Douglas V. Keller, Jr.

Douglas V. Keller, Jr. 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).

  • Viscosity modification of bituminous materials
    Patent number: 4151003
    Abstract: Methods of modifying the viscosity of bituminous materials in which a fluoro or chlorofluoro derivative of a lower alkane is mixed therewith, and processes involving and employing products so modified.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: April 24, 1979
    Assignee: Otisca Industries, Ltd.
    Inventors: Clay D. Smith, Douglas V. Keller, Jr.
  • Viscosity modification of hydrocarbonaceous materials
    Patent number: 4089340
    Abstract: Methods of modifying the viscosity of hydrocarbonaceous materials in which a fluoro or chlorofluoro derivative of a lower alkane is mixed therewith, and processes involving and employing products so modified.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: May 16, 1978
    Assignee: OTISCA Industries, Ltd.
    Inventors: Clay D. Smith, Douglas V. Keller, Jr.
  • Methods of and apparatus for mining and processing tar sands and the like
    Patent number: 4067616
    Abstract: Methods of and apparatus for recovering bitumen from tar sands and the like in which the tar sand is mechanically dislodged from the formation in which it is deposited and in which a solvent for the bitumen is mixed with the mined material to reduce the viscosity of the bitumen and thereby facilitate the transfer of the mined material to an operation where the bitumen is separated from solid components of the tar sand.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: January 10, 1978
    Assignee: Standard Oil Company
    Inventors: Clay D. Smith, Douglas V. Keller, Jr.
  • Multi-phase separation methods and apparatus
    Patent number: 4055480
    Abstract: Multi-phase mixtures are resolved into separate phases by introducing the mixture into a body of liquid which contains a solvent for one of said phases and has a specific gravity intermediate two insoluble phases of the mixture. The latter accordingly migrate to different levels in the body of liquid and can be separately recovered therefrom. Solvent laden with the soluble phase is also separately removed from the body of liquid, and the solvent can then be stripped to isolate the soluble phase.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: October 25, 1977
    Assignee: Standard Oil Company
    Inventors: Clay D. Smith, Douglas V. Keller, Jr.