Patents by Inventor Petrus Johannes Leeuwen

Petrus Johannes Leeuwen 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).

  • Detergent compostions inhibiting dye transfer comprising copolymers of n-vinylimidazole and n-vinylpyrrolidone
    Patent number: 5710118
    Abstract: A detergent composition comprises clay, a surfactant system and a copolymer of N-vinylimidazole and N-vinylpyrrolidone. The copolymer is present in the detergent composition in an amount of 0.01% to 10.0% by weight. The copolymer has an average molecular weight of from 5,000 to 50,000 and a molar ratio of N-vinylimidazole to N-vinylpyrrolidone of from 1:1 to 1:02.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: January 20, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Alfred Busch, Andre Christian Convents, Petrus Johannes Leeuwen