Patents by Inventor Roberg D. Lundberg

Roberg D. Lundberg 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).

  • Novel polyampholyte compositions possessing high degree of acid, base, or salt tolerance in solution
    Patent number: 4946916
    Abstract: Intramolecular polymer complexes synthesized from acrylamide, sodium styrene sulfonate, and methacrylamidopropyltrimethylammonium chloride, having viscosity-polymer concentration relationships that are invarient with the addition of high levels of acid, base, or salt to the fresh water system. These complexes possess a "balance" between conventional polyelectrolyte and polyamopholyte behavior.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: August 7, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Dennis G. Peiffer, Roberg D. Lundberg