Patents by Inventor Janet Layne Marshall

Janet Layne Marshall 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).

  • Light duty liquid or gel dishwashing detergent compositions containing protease
    Patent number: 5952278
    Abstract: Mild detergent compositions which exhibit good cleaning performance comprise detergent surfactants and small amounts of protease. A preferred embodiment additionally contains suds boosters and divalent ions.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: September 14, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Mark Hsiang-Kuen Mao, Janet Layne Marshall, Martha Orrico Visscher
  • Monomeric rich silicate system in automatic dishwashing composition with improved glass etching
    Patent number: 5703027
    Abstract: Automatic dishwashing detergent compositions comprising a certain combination of metasilicate with other silicate (polymeric) components are disclosed. Particularly preferred compositions also comprise low foaming surfactant and detergency builders.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: December 30, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Gregory Stephen Caravajal, Janet Layne Marshall
  • Thixotropic liquid automatic dishwashing composition with enzyme
    Patent number: 5691292
    Abstract: A viscoelastic, thixotropic, liquid automatic dishwashing detergent composition which is substantially free of chlorine bleach and silicate and contains enzyme(s), an enzyme stabilizing system, and a detergent surfactant or detergent builder is provided. It has a product pH between about 7 and about 11.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: November 25, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Janet Layne Marshall, David Lee Hall, Hal Ambuter, Edward Paul Fitch