Patents by Inventor Richard D. Skinner

Richard D. Skinner 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).

  • Preparation of thiolactams
    Patent number: 4956476
    Abstract: The reaction of lactams (preferably N-methyl-2-pyrrolidone) with hydrogen sulfide to thiolactams (preferably N-methyl-2-thiopyrrolidone) is conducted in the presence of a catalyst consisting essentially of alumina.
    Type: Grant
    Filed: March 1, 1990
    Date of Patent: September 11, 1990
    Assignee: Phillips Petroleum Company
    Inventors: Alan D. Eastman, Marvin M. Johnson, Richard D. Skinner