Patents by Inventor James E. McGuffin

James E. McGuffin 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).

  • Beader drum method
    Patent number: 4859387
    Abstract: A carbon black beader drum having a plow-like member extending into the moving bed of beads within the drum. The member parts the surface of the moving bed, and carbon black in powder form is added to the beader drum by placement into the impression or furrow created in the moving bed by the member. The added powder is covered a short distance behind the member, preventing the powder from depositing on the inner surface of the beader drum.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: August 22, 1989
    Assignee: Columbian Chemicals Company
    Inventor: James E. McGuffin