Patents by Inventor Hans Willing

Hans Willing 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).

  • Preparation of finely divided polyolefin molding materials containing conductive carbon black, and their use for the production of moldings
    Patent number: 4287117
    Abstract: A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of polyolefin and from 1 to 30 parts by weight of a conductive carbon black, with or without other additives, wherein the mixture of polyolefin powder and carbon black is compounded, in a first stage, until the crystallite melting point of the polyolefin is reached, and is then brought, in a second stage, to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point, after which the mixture is discharged from the mixer within from 0.5 to 30 seconds and is cooled within 120 seconds.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: September 1, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Theysohn, Gerhard Zeitler, Frank Weiss, Hans Willing, Erhard Seiler