Patents by Inventor Dwight T. Lohkamp

Dwight T. Lohkamp 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).

  • Die design for underwater pelletization of high flow rate polymers
    Patent number: 4822546
    Abstract: High melt flow rate polymers are pelletized with greater uniformity and less malformed pellets from underwater extrusion process by die orifices having a narrow preland sufficient to evenly distribute the polymer followed by a wide final hole that forms a polymer strand sufficient to avoid deformation by water currents during pelletization.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: April 18, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Dwight T. Lohkamp