Patents by Inventor Ted Burnham

Ted Burnham 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).

  • Polymer processing system and apparatus
    Patent number: 6602064
    Abstract: The invention provides a counter-rotating extrusion system for processing foam material. The system is designed to introduce a physical blowing agent into the extruder, thoroughly disperse the blowing agent within the polymer melt and, preferably, to maintain relatively high pressures downstream from the point of blowing agent introduction. High quality polymeric foams, including microcellular foams, can be produced using the extrusion system. The system is particularly suitable for the production of foams using shear sensitive and degradable materials, such as PVC.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: August 5, 2003
    Assignee: Trexel, Inc.
    Inventors: Ligin Chen, Kent Blizard, Roland Kim, Ted Burnham