Patents by Inventor Andreas Sobbe

Andreas Sobbe 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).

  • Process for pelleting ultra-high molecular weight polyethylene
    Patent number: 5393473
    Abstract: Pulverulent ultra-high molecular weight polyethylene, alone or as a mixture with other polyethylenes, is compacted into extrudates by extrusion agglomeration under pressure at temperatures of 100.degree. to 150.degree. C. over average residence times in the die of 2 to 40 seconds and at a compression ratio of 1:5 to 1:15, and the extrudates are divided into pellets.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: February 28, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Payer, Maher Onallan, Winfried Materne, Andreas Sobbe