Patents by Inventor Bernard Zurkoff

Bernard Zurkoff 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 flow through die
    Patent number: 4331623
    Abstract: Polyolefin resin pellets of greater uniformity of shape and characterized by an almost complete absence of tails are obtained by the use in the pelletizing apparatus of dies which have been coated by a thin layer of finely divided solid lubricant such as molybdenum disulfide or, preferably, graphite applied to the interior surfaces of the die by cross bombardment with a stream or streams of finely divided solid lubricant under pressure.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: May 25, 1982
    Assignee: El Paso Polyolefins Company
    Inventors: Bernard Zurkoff, Bennie M. Lucas