Grant R. Stephenson

Person

  • Deep River, CA

Patents Grantslast 30 patents

  • Information Patent Grant

    Self-wiping multiple screw element mixer

    • Patent number 4,344,711
    • Issue date Aug 17, 1982
    • Du Pont Canada Inc.
    • John A. Kendall
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL