Patents by Inventor Gerhard Thum

Gerhard Thum 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 the preparation of polyolefin
    Patent number: 5349033
    Abstract: It is possible to obtain globular polymers in the polymerization of alpha-olefins by means of a highly active, spherical Ziegler catalyst. The polymers have a high bulk density and can be processed very easily.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: September 20, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Gerhard Thum
  • Process for the preparation of a filled polyolefin molding material
    Patent number: 4774269
    Abstract: A filled polyolefin molding material having a very high filler content and containing no filler-free polymer and no polymer-free filler is obtained when the Ziegler catalyst is initially formed on the filler and the catalyst-charged filler is then used for the polymerization without addition of further catalyst or activator. The molding material is highly suitable, in particular when it has a high content of aluminum powder, for the production of molded parts having good thermal conductivity and a high electrical volume resistance.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: September 27, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Gerhard Thum