Patents by Inventor Richard John Dumbrell

Richard John Dumbrell 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).

  • Textile softening detergent compositions
    Patent number: 3966629
    Abstract: Granular built laundry detergent compositions comprising smectite-type clay materials and prepared by specified processes.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: June 29, 1976
    Assignee: The Procter & Gamble Company
    Inventor: Richard John Dumbrell