Patents by Inventor John R. Wiedemann

John R. Wiedemann 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).

  • Cleaning poultry manure from support surfaces of an egg-laying installation
    Patent number: 6340000
    Abstract: A method of cleaning poultry manure from support surfaces of an egg-laying installation which comprises contacting the manure with an aqueous solution obtained by combining water and one or more compounds selected from alkali metal polyphosphates, organo-phosphonates, alkali metal salts of nitriloacetic acid and alkali metal salts of ethylene diamine tetraacetic acid.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: January 22, 2002
    Assignee: Solutia Inc.
    Inventors: James S. Holtrop, John R. Wiedemann
  • Zinc tripolyphosphate compounds as anticalculus and antiplaque agents
    Patent number: 5032389
    Abstract: A dentifrice composition is disclosed which contains an effective amount of a zinc-alkali metal tripolyphosphate compound for the control of dental plaque and dental calculus.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: July 16, 1991
    Assignee: Monsanto Chemical Company
    Inventors: Albert S. Chan, John R. Wiedemann, Samuel L. Hull