Patents by Inventor William J Wittke

William J Wittke 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).

  • Composition and method for deburring/degreasing/cleaning metal surfaces
    Patent number: 6211132
    Abstract: An acidic aqueous liquid composition for deburring/degreasing/cleaning metal, in particular aluminum, parts by mass finishing has as its active ingredients: (A) a nonionic surfactant containing halogen atoms, (B) nitrogen based surfactants such as n-alkyl pyrrolidone, builders such as silicates and boric acid, hydrotropes, corrosion inhibitors, and sequestering agents.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 3, 2001
    Assignee: Henkel Corporation
    Inventors: John R Pierce, Lawrence R Carlson, William J Wittke