Patents by Inventor David Wilson Ashworth

David Wilson Ashworth 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).

  • Antimicrobial compositions comprising polymeric stabilizers
    Patent number: 7479476
    Abstract: Antimicrobial composition comprising iodide and thiocyanate anions, periodic acid, and nitrogen and/or phosphorous containing polymers.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: January 20, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: David Wilson Ashworth, Darren Hodgkinson, Jürgen Huff
  • Reducing the level of bacteria and viruses in aquaculture
    Patent number: 7140323
    Abstract: A method of reducing the level of bacteria and viruses in a volume of water during aquaculture comprises:—(a) providing the volume of water to be stocked with farmed aquatic organisms or eggs thereof; (b) prior to the stocking, introducing into the water an aqueous solution of glutaraldehyde in an amount such as to provide in the water from 0.1 to 2 ppm of glutaraldehyde; (c) stocking the water with the farmed aquatic organisms or eggs thereof at a time when the concentration of glutaraldehyde is 0.1 to 2 ppm. (d) allowing the farmed aquatic organisms or eggs thereof to grow; and (e) optionally during a period of the growth, introducing into the water at least one further portion of an aqueous solution of glutaraldehyde in an amount such as to maintain the concentration of the glutaraldehyde at 0.1 to 2 ppm.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: November 28, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: David Wilson Ashworth, Angelika Benz, Dieter Zeller
  • 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