Patents by Inventor G. Frederick Pierce-Ruhland

G. Frederick Pierce-Ruhland 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).

  • Deposit cleaning composition for internal combustion engines
    Patent number: 5407453
    Abstract: It has been found that a composition comprising an alkoxy alcohol, an aliphatic alcohol, a liquid petroleum distillate, a liquid fatty acid, a volatile nitrogen base, polyisobutenyl aminoethylethanolamine, and water may be used as an engine deposit cleaner which removes air and fuel induction system deposits, valve deposits, and combustion chamber deposits. The inventive composition may be introduced into the engine in lieu of fuel, or in conjunction with fuel while the engine is operating.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: April 18, 1995
    Assignee: The Lubrizol Corporation
    Inventors: G. Frederick Pierce-Ruhland, Stephen H. Stoldt