Patents by Inventor Barry E. Heldman

Barry E. Heldman 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).

  • Continuous process for the production of poly(1-alkenes)
    Patent number: 5644007
    Abstract: Described herein is a continuous process for polymerizing 1-alkenes. In this process, which operates free of any hydrogen control feed, the resultant polymer has an inherent viscosity that is closely centered around a predetermined targeted value. If desired, the targeted value can be changed while the process is being performed. The process is carried out in a reactor that allows for essentially plug flow of material passing therethrough. Additionally, the temperature profile of the reactor is controllable.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: July 1, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Robert S. Davidson, Robert W. Ferguson, Barry E. Heldman, Timothy J. Diekmann, Anthony R. Maistrovich, James A. Higgins, Mark D. Gehlsen