Patents by Inventor Ralph D. May

Ralph D. May 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).

  • Method for oxygen removal with keto-gluconates
    Patent number: 5178796
    Abstract: There is disclosed a method for removing dissolved oxygen from aqueous systems, for example, boiler water systems for oil injection water or brine. The disclosed method uses a salt of a keto-gluconic acid, or a salt of a stereoisomer of a keto-gluconic acid, as the oxygen scavenger a metal containing compound which controls the rate of oxygen removal.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: January 12, 1993
    Assignee: Pfizer Inc.
    Inventors: Herman L. Gewanter, Ralph D. May
  • Oxygen removal with keto-gluconates
    Patent number: 5114618
    Abstract: There is disclosed a composition and method for removing dissolved oxygen from aqueous systems, for example, boiler water systems or oil injection water or brine. The disclosed method and composition uses a salt of a keto-gluconic acid, or a salt of a stereoisomer of a keto-gluconic acid, as the oxygen scavenger.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: May 19, 1992
    Assignee: Pfizer Inc.
    Inventors: Herman L. Gewanter, Ralph D. May
  • Oxygen removal with carbon catalyzed erythorbate or ascorbate
    Patent number: 4851130
    Abstract: When an aqueous system containing dissolved oxygen and erythorbate or ascorbate is passed through an activated carbon bed, the oxygen is removed at ambient temperatures. This method of oxygen removal finds practical application in the removal of oxygen from boiler condensate, low temperature boiler feedwater and oil well injection water or brine.
    Type: Grant
    Filed: November 30, 1988
    Date of Patent: July 25, 1989
    Assignee: Pfizer Inc.
    Inventor: Ralph D. May