Patents by Inventor Richard J. Sitko

Richard J. Sitko 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).

  • Vacuum carburizing steel
    Patent number: 4386973
    Abstract: A method of carburizing steel comprising carburizing steel under vacuum utilizing as the carburizing gas an aliphatic alcohol having 1 to 4 carbon atoms, preferably methanol and natural gas additions.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: June 7, 1983
    Assignee: General Signal Corporation
    Inventors: Richard J. Kawka, Daniel H. Herring, Philip Roth, Richard J. Sitko