Patents by Inventor Helmut Klamann

Helmut Klamann 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 propylene homopolymers or copolymers
    Patent number: 4442271
    Abstract: The disclosure is directed to an improvement in the gas phase polymerization of propylene using a Ziegler-Natta catalyst in the presence of hydrogen wherein the gaseous propylene is withdrawn from the reactor, cooled and condensed and returned as a liquid to the reactor in order to regulate the polymerization temperature. The amount of the gaseous phase in the condenser-cooler-accumulator system is kept constant by regulating the amount of gaseous phase returned to the reactor.
    Type: Grant
    Filed: May 26, 1982
    Date of Patent: April 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Rau, Helmut Klamann, Peter Hennenberger