Patents by Inventor Janet L. Marshall

Janet L. 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).

  • Patent number: 5599400
    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: June 6, 1995
    Date of Patent: February 4, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Mark H. Mao, Janet L. Marshall, Martha O. Visscher
  • Patent number: 5292446
    Abstract: Disclosed is a process for making nonphosphated automatic dishwashing detergents which have granular form and comprise a conventional nonphosphorus builder system consisting essentially of an organic builder salt (such as citrate) and a dispersant (such as a polyacrylate); and an oxygen bleach system comprising a chelant (such as ethylenediamine disuccinate) and a bleach active (such as perborate or percarbonate) optionally with enzymes and/or dry-mixed hydrous silicates. The invention secures stable, free-flowing granules by a premix step in which the chelant and dispersant are brought together; a drying step using conventional equipment; and one or more admix steps in which the bleach active is mixed with the product of the drying step.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: March 8, 1994
    Assignee: The Procter & Gamble Company
    Inventors: Jeffrey D. Painter, Janet L. Marshall, James C. B. St. Laurent