Patents by Inventor David Dierassi

David Dierassi 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).

  • Powdered shampoo concentrate
    Patent number: 4330438
    Abstract: A unique powder shampoo concentrate is disclosed comprising a mixture of an anionic surfactant and a nonionic derivative of a polygalactomannan gum together with conventional shampoo ingredients, which upon dilution with water, rapidly forms a viscous, rich lathering shampoo with superior cleansing and conditioning properties.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: May 18, 1982
    Assignee: Hoffmann-La Roche Inc.
    Inventors: David Dierassi, David Murray