Patents by Inventor Lucien D. Yokana

Lucien D. Yokana 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).

  • Extruder screw
    Patent number: 4733970
    Abstract: Extruder screw having a feed section, compression section and metering section. The compression section includes two transition portions with a barrier flighted portion disposed therebetween. The screw reduces the power consumption and stock temperature of thermoplastic material.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: March 29, 1988
    Assignee: Sterling Extruder Corporation
    Inventor: Lucien D. Yokana