Patents by Inventor Lewis Volgenau

Lewis Volgenau 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).

  • Sulfur-containing lignins as magnesium sulfite tri-hydrate dispersants
    Patent number: 4326962
    Abstract: The present invention relates to a method for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions which method comprises adding to the medium an effective amount for the purpose of a sulfur-containing lignin.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: April 27, 1982
    Assignee: Betz Laboratories, Inc.
    Inventors: Robert L. Jones, Lewis Volgenau, Philip S. Davis
  • Compositions for treating aqueous mediums containing magnesium sulfite trihydrate
    Patent number: 4171292
    Abstract: A composition is disclosed for use in dispersing magnesium sulfite tri-hydrate in an aqueous medium which composition comprises, in combination, an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: October 16, 1979
    Assignee: Betz Laboratories, Inc.
    Inventors: Robert L. Jones, Lewis Volgenau, Philip S. Davis
  • Method for treating aqueous mediums
    Patent number: 4136152
    Abstract: A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective amount for the purpose of an oligomer and a sulfur-containing lignin.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: January 23, 1979
    Assignee: Betz Laboratories, Inc.
    Inventors: Robert L. Jones, Lewis Volgenau, Philip S. Davis
  • Method for treating aqueous mediums containing magnesium sulfite trihydrate
    Patent number: 4093580
    Abstract: A method is disclosed for treating an aqueous medium containing magnesium sulfite tri-hydrate under precipitating conditions comprising adding in combination to the aqueous medium an effective amount for the purpose of an oligomer and a copolymer of a 1-olefin and an unsaturated anhydride.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: June 6, 1978
    Assignee: Betz Laboratories, Inc.
    Inventors: Robert L. Jones, Lewis Volgenau, Philip S. Davis