Patents by Inventor Roger Clarence Birkofer

Roger Clarence Birkofer 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).

  • Mild thickened shampoo compositions with conditioning properties
    Patent number: 3962418
    Abstract: Mild thickened liquid shampoo compositions with conditioning properties comprise anionic surfactants, specific zwitterionic and amphoteric surfactants, polyethoxylated nonionic surfactants and a cationic cellulose ether thickening and conditioning agent.
    Type: Grant
    Filed: April 8, 1975
    Date of Patent: June 8, 1976
    Assignee: The Procter & Gamble Company
    Inventor: Roger Clarence Birkofer