Patents by Inventor Earl D. Cooper

Earl D. Cooper 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).

  • Process and die for extrusion of a resinous material
    Patent number: 4056597
    Abstract: A resinous material is extruded through an orifice in a die to produce a strand, the orifice having an inlet zone, a cylindrical zone and an outlet zone, the inlet zone converging in the direction of flow of the resinous material and attached to one end of the cylindrical zone and the outlet zone diverging in the direction of flow of the resinous material and attached to the other end of the cylindrical zone. A die for extrusion of a resinous material is provided.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: November 1, 1977
    Assignee: Phillips Petroleum Company
    Inventor: Earl D. Cooper