Patents by Inventor Marvin F. Loetterle

Marvin F. Loetterle 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).

  • Dewatering of plastic materials with controlled gaseous injection
    Patent number: 4185057
    Abstract: Plastic materials are dewatered in an extruder by applying heat and pressure and venting out vaporized water; before the plastic is extruded through the die orifice a gas is injected under high pressure into the plastic and this causes gas explosions when the plastic is released through the die orifices. The particles produced have micropores which provide improved workability, and form bales of controllable density.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: January 22, 1980
    Assignee: W Bar E, Inc.
    Inventors: Paul H. Rossiter, Marvin F. Loetterle