Patents by Inventor Sibylle Von Tomkewitsch

Sibylle Von Tomkewitsch 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).

  • Conductive nylon molding materials
    Patent number: 4655964
    Abstract: Conductive molding materials contain(A) from 29 to 76% by weight of one or more linear thermoplastic nylons,(B) from 20 to 50% by weight of finely divided calcined kaolin and/or finely divided calcium metasilicate, which are coated with organosilanes as coupling agents,(C) from 4 to 6% by weight of conductive carbon black having a BET specific surface area >900 m.sup.2 /g and a DBP absorption >300 ml/100 g and, if required,(D) from 0 to 15% by weight of conventional additives in effective amounts,the percentages of A to D summing to 100.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: April 7, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Steinberger, Johannes Schlag, Karl Schlichting, Erhard Seiler, Sibylle Von Tomkewitsch, Hans-Friedrich Schmidt