Patents by Inventor Willem Alfons Prinsen

Willem Alfons Prinsen 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).

  • Low phosphate content detergent composition
    Patent number: 4000080
    Abstract: A low phosphate content detergent composition comprising about 10% to about 25% by weight phosphate builder, about 3% to 30% hardness mineral ion insensitive detergent, about 0.5% to about 3% maleic anhydride-vinyl compound copolymer, and from about 0.5% to about 3% alkylene oxide condensation product.
    Type: Grant
    Filed: October 11, 1974
    Date of Patent: December 28, 1976
    Assignee: The Procter & Gamble Company
    Inventors: Giuseppe Bartolotia, Willem Alfons Prinsen, Jean-Paul Frenay