Patents by Inventor Kenneth E. Swain

Kenneth E. Swain 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).

  • Pigment metering and mixing apparatus
    Patent number: 4021022
    Abstract: Apparatus for continuously metering small amounts of comminuted plastic color pigment or concentrate in desired proportions to a volume of resin being supplied to an extruder. The feed of the color concentrate is accurately metered by a controlled electromagnetic vibrator and delivered into the resin feed throat of the extruder.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: May 3, 1977
    Assignee: Americhem, Inc.
    Inventors: John J. Satterfield, III, Kenneth E. Swain