Patents by Inventor John Stuart Stevenson

John Stuart Stevenson 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).

  • Metal treatment
    Patent number: 3957669
    Abstract: Disclosed is a method and composition useful for etching steel prior to metal plating which can be followed by enamelling. The etching composition contains sodium benzene sulphinate and an acid and promotes adhesion of metal and enamel coatings applied over the etched surface.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: May 18, 1976
    Assignee: Oxy Metal Finishing (Great Britain) Ltd.
    Inventors: Surindar Singh Tulsi, John Stuart Stevenson