Patents by Inventor Paul J. Holtzapfel

Paul J. Holtzapfel 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).

  • Soft coating compositions for metals
    Patent number: 5338346
    Abstract: This invention relates to a soft coating for ferrous metal surfaces tanks, having a thickness of about 1-10 mils, comprising over-based alkaline aliphatic-aromatic organic sulfonate salt, an alkaline earth metal or zinc salt of a naphthalene sulfonate, a drying oil, a metal drier, and a paraffinic oil. The coating is particularly useful for coating ferrous metal surfaces, such as ballast tanks, which are exposed to seawater. The invention also relates to a process for inhibiting the corrosion of ballast tanks.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: August 16, 1994
    Assignee: Ashland Oil, Inc.
    Inventors: Lionel B. Luttinger, Rosanna P. Rudy, Paul J. Holtzapfel