Patents by Inventor Harold E. Klassen

Harold E. Klassen 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).

  • Process for the removal of carbon from solid surfaces
    Patent number: 4363673
    Abstract: A method of removing residual carbon from solid surfaces, such as metal or glass, by contacting the surface with sulfur trioxide and thereafter rinsing the surface. The surface may be subsequently contacted with a passivating solution.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: December 14, 1982
    Assignee: The Dow Chemical Company
    Inventors: William J. Settineri, Harold E. Klassen, Milton C. Tolly