Patents by Inventor Robbie T. Foster

Robbie T. Foster 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).

  • Catalyst for production of ethylene dichloride
    Patent number: 4172052
    Abstract: Ethylene dichloride having a reduced chloral content is prepared by vapor phase oxychlorination of ethylene in the presence of a catalyst comprising aluminum halide and copper halide carried on a particulate support.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: October 23, 1979
    Assignee: PPG Industries, Inc.
    Inventor: Robbie T. Foster
  • Treatment of asbestos diaphragms and resulting diaphragm
    Patent number: 3991251
    Abstract: Disclosed is a method of preparing an asbestos diaphragm where alkali metal ions are provided from an aqueous alkaline solution within the fibrous asbestos diaphragm, the diaphragm is heated to form an alkali metal silicate layer on the asbestos fibers, and thereafter contacted with anolyte liquor.
    Type: Grant
    Filed: October 3, 1973
    Date of Patent: November 9, 1976
    Assignee: PPG Industries, Inc.
    Inventors: Robbie T. Foster, William B. Darlington, Malcolm Korach
  • Laminated asbestos diaphragm
    Patent number: 3939055
    Abstract: Disclosed is a method of preparing an asbestos diaphragm where alkali metal ions are provided within the fibrous asbestos diaphragm, the diaphragm is heated to form an alkali metal silicate layer on the asbestos fibers, and thereafter a further layer of asbestos is deposited on the diaphragm.
    Type: Grant
    Filed: October 3, 1973
    Date of Patent: February 17, 1976
    Assignee: PPG Industries, Inc.
    Inventor: Robbie T. Foster