Patents by Inventor Christiaan Arthur J. K. Thoen

Christiaan Arthur J. K. Thoen 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 detergents containing a peptide trifluoromethyl ketone
    Patent number: 5840678
    Abstract: Aqueous liquid detergent compositions are described which comprise a proteolytic enzyme wherein the proteolytic activity is reversibly inhibited by a peptide trifluoromethyl ketone.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: November 24, 1998
    Assignee: Procter & Gamble Company
    Inventors: Regine Labeque, John McMillan McIver, Christiaan Arthur J.K. Thoen
  • Liquid detergents containing a peptide aldehyde
    Patent number: 5830840
    Abstract: The invention relates to a detergent composition which is a liquid detergent composition which comprises a surfactant, a proteolytic enzyme, and an enzyme inhibitor which is a peptide aldehyde. Said peptide aldehyde inhibitor contain 4 or 5 amino acids. Said peptide aldehydes are used to enhance the stability of proteolytic enzymes in liquid detergent environments.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: November 3, 1998
    Assignee: The Procter & Gamble Company
    Inventors: James Pyott Johnston, Regine Labeque, Pierre Marie Alain Lenoir, Christiaan Arthur J. K. Thoen, John McMillan McIver
  • Liquid detergent compositions containing brighteners and polymers for preventing fabric spotting
    Patent number: 5776878
    Abstract: Compositions for reducing brightener spotting comprise a polymer selected from the group consisting of polyamine N-oxide containing polymers, N-vinylimidazole N-vinylpyrrolidone copolymers and mixtures thereof, a stilbene brightener, and from 5% to 7% hydrogen peroxide, wherein the weight ratio of the polymer to the brightener is from 1:20 to 20:1 and the pH of the composition is from 2 to 6.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: July 7, 1998
    Assignee: The Procter & Gamble Company
    Inventor: Christiaan Arthur J. K. Thoen
  • Liquid detergent composition containing lipase and protease
    Patent number: 5733473
    Abstract: Liquid detergent compositions are disclosed which contain conventional detergency ingredients and an enzyme system, wherein the enzyme system comprises a mixture of a lipase, or mixtures thereof, and a modified bacterial serine protease, or mixtures of said proteases.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: March 31, 1998
    Assignee: The Procter & Gamble Company
    Inventors: James Pyott Johnston, Pierre Marie Alain Lenoir, Christiaan Arthur J. K. Thoen