Patents by Inventor Stephen G. Hales

Stephen G. Hales 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).

  • Polymers and detergent compositions containing them
    Patent number: 5464558
    Abstract: Carboxylic polymers useful in detergent compositions contain keto structural units incorporated into the polymer backbone. The units may be introduced by means of the compound 2,2'-diphenyl-4-methylene-1,3-dioxolane. The polymers show better biodegradability than the acrylic and acrylic/maleic polymers commonly used in detergent compositions, while the detergency building (calcium binding) is comparable or better.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: November 7, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen G. Hales, Ezat Khoshdel, Robert Polywka
  • Polymers and detergent compositions containing them
    Patent number: 5439997
    Abstract: Carboxylic polymers useful in detergent compositions contain keto structural units incorporated into the polymer backbone. The units may be introduced by means of the compound 2,2'-diphenyl-4-methylene-1,3-dioxolane. The polymers show better biodegradability than the acrylic and acrylic/maleic polymers commonly used in detergent compositions, while the detergency building (calcium binding) is comparable or better.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: August 8, 1995
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Stephen G. Hales, Ezat Khoshdel, Robert Polywka