Patents by Inventor Ross C. Opsahl

Ross C. Opsahl 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).

  • Functionalized copolymer of higher .alpha.-olefin and unsaturated dicarboxylic acid ester and derivatives thereof
    Patent number: 5446105
    Abstract: Anhydride functionalized copolymers of a higher .alpha.-olefin, and an unsaturated dicarboxylic acid ester formed by copolymerization of olefin, acid ester and anhydride of the acid can be used to form imide and polar group-containing lubricant additives by reaction of the anhydride functionality in such a copolymer with an organic compound containing amino functionality and a polar group, such as hydroxy or carboxylic acid.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: August 29, 1995
    Assignee: Akzo Nobel N.V.
    Inventors: Richard Hombek, Ross C. Opsahl, Theodore A. Marolewski
  • Composition and process for inhibiting corrosion of ferrous or non-ferrous metal surfaced articles and providing receptive surface for synthetic resin coating compositions
    Patent number: 4564397
    Abstract: Phosphate coated ferrous and non-ferrous metal surfaced articles are passivated without treatment by a chromium compound by rinsing with an aqueous solution of urea or a urea derivative, or an acidulated urea or urea derivative in an amount sufficient to form a corrosion resistant barrier on the surface which is receptive to synthetic resinous coating compositions.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: January 14, 1986
    Assignee: J. N. Eltzroth & Associates Inc.
    Inventor: Ross C. Opsahl