Patents by Inventor Ralph E. Rypkema

Ralph E. Rypkema 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).

  • Carpet cleaning composition with bleach
    Patent number: 5338475
    Abstract: A carpet cleaning composition is disclosed. The composition contains, on a weight-to-weight basis,a. about 0.30 to 2.2 percent of hydrogen peroxide;b. from about 0.05 to about 5.0 percent of a nonionic, anionic or amphoteric surfactant or mixture thereof; andc. a pH in the range above 3.5 and below 6.4.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: August 16, 1994
    Assignee: Sterling Drug, Inc.
    Inventors: Garland P. Corey, Elmer M. King, Ralph E. Rypkema