Patents by Inventor Walter Graham Guthrie

Walter Graham Guthrie 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).

  • Liquid antimicrobial compositions
    Patent number: 6866869
    Abstract: A liquid antimicrobial composition comprises: (1) a mixture of iodide anions and thiocyanate anions; (2) periodic acid or an alkali metal salt thereof; and (3) optionally, a peroxidase. The composition may be used as a microbicide, disinfectant or for suppressing or killing viruses or spores.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: March 15, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Graham Guthrie, Mohammed Shoaib Qureshi, Lawrence Alan Staniforth, Darren Michael Hodgkinson, David Wilson Ashworth
  • Liquid antimicrobial compositions
    Publication number: 20040052778
    Abstract: A liquid antimicrobial composition comprises:
    Type: Application
    Filed: October 10, 2003
    Publication date: March 18, 2004
    Inventors: Walter Graham Guthrie, Mohammed Shoaib Qureshi, Lawrence Alan Staniforth, Darren Michael Hodgkinson, David Wilson Ashworth
  • Stabilized lactoperoxidase and glucose oxidase concentrate
    Patent number: 6312687
    Abstract: A stabilized aqueous enzyme concentrate composition which comprises: a) 1000 to 1800 units/ml of lactoperoxidase; b) 1500 to 2750 units/ml of glucose oxidase; c) 10 to 20% w/v of an alkali metal halide salt; and d) a chelating buffering agent present in an amount such that the pH of the composition is in the range of 5.5 to 6.5.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: November 6, 2001
    Assignee: Knoll Aktiengesellschaft
    Inventors: Walter Graham Guthrie, David Vincent Roper
  • Chemical compositions for inhibiting nitrosation reaction in toiletries and cosmetics
    Patent number: 5807542
    Abstract: Iminium ion scavengers are used in the invention to inhibit formation of N-nitrosamines, especially in cosmetics and pharmaceuticals formulations. The iminium ion scavengers may be used in combination with nitrite ion scavengers such as ascorbate.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: September 15, 1998
    Assignee: Knoll Aktiengesellschaft
    Inventors: Brian Christopher Challis, Walter Graham Guthrie, David Vincent Roper, David Frank Trew