Patents by Inventor Vincent R. Kuhn

Vincent R. Kuhn 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).

  • Corrosion inhibition with water-soluble rare earth chelates
    Patent number: 5130052
    Abstract: A method of inhibiting corrosion of a metal surface in an aqueous system having a pH of at least 6, comprising maintaining in the aqueous system, in an amount effective to inhibit corrosion, a water-soluble, organic-rare earth metal chelate which is derived from a rare earth metal having an atomic number from 57 to 71 and an organic chelant. The organic chelant provides not only water solubility but surprisingly enhanced corrosion inhibiting activity. The water-soluble, organic-rare earth chelates may be advantageously combined with other corrosion inhibitors such as zinc chelates, organophosphonates, phosphates, chromates, molybdates, and the like.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: July 14, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert P. Kreh, Vincent R. Kuhn, John Richardson, Robert M. Spotnitz, Charles G. Carter, Vladimir Jovancicevic
  • Corrosion control
    Patent number: 5022926
    Abstract: A method of removing iron contaminants in an aqueous system by introducing and maintaining within the system at least one ortho dihydroxyaromatic compound having at least one electron withdrawing group pendant from the aromatic ring and, further, a method of inhibiting calcium scale formation in the presence of iron contaminants by utilizing at least one dehydroxyaromatic compound in combination with calcium scale inhibitors.
    Type: Grant
    Filed: May 18, 1989
    Date of Patent: June 11, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert P. Kreh, Joseph T. Lundquist, Wayne L. Henry, John A. Kelly, Vincent R. Kuhn
  • Removal of iron fouling in cooling water systems
    Patent number: 4721532
    Abstract: Removing iron fouling from heat transfer surfaces of cooling water systems with an aqueous solution of certain alkylene amine carboxyl polyacids, or water soluble salts thereof, at a pH of 5-9.
    Type: Grant
    Filed: July 22, 1986
    Date of Patent: January 26, 1988
    Assignee: W. R. Grace & Co.
    Inventors: Vincent R. Kuhn, Philip R. Engelhardt, Wayne A. Mitchell
  • Method of inhibiting corrosion of iron base metals
    Patent number: 4588519
    Abstract: A process for inhibiting the corrosion of iron based metals in contact with aqueous systems by incorporating in the aqueous system an effective amount of a composition comprising an inorganic phosphate and a water soluble organic copolymer of acrylamido-sulfonic acid monomers with vinyl carboxylic acid monomers.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: May 13, 1986
    Assignee: Dearborn Chemical Company
    Inventor: Vincent R. Kuhn
  • Anti-corrosion composition
    Patent number: 4202796
    Abstract: Composition for prevention of ferrous corrosion consisting essentially of (a) sorbitol, (b) benzotriazole or tolyltriazole, and (c) a water-soluble phosphate.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: May 13, 1980
    Assignee: Chemed Corporation
    Inventors: Jose T. Jacob, Vincent R. Kuhn