Patents by Inventor John A. Dumbrell

John A. 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
  • Egg flip-scraper and spatula
    Patent number: D312029
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: November 13, 1990
    Assignee: Kader Plastics Pty. Ltd.
    Inventor: John A. Dumbrell
  • Stackable container
    Patent number: D328030
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: July 21, 1992
    Inventor: John A. Dumbrell