Patents by Inventor Robert D. Cleland

Robert D. Cleland 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 granular stereoregular butene-1 polymers in a fluidized bed
    Patent number: 4503203
    Abstract: Granular stereoregular butene-1 polymers having a high isotactic content, and an extractables content of no more than about 15 weight percent in boiling ethyl ether, are produced over a continuous extended period of time in a low pressure gas phase fluidized bed process, in the absence of liquid diluent components, with a stereospecific olefin polymerization catalyst under a selected set of operating conditions.
    Type: Grant
    Filed: December 20, 1983
    Date of Patent: March 5, 1985
    Assignee: Union Carbide Corporation
    Inventors: Nancy M. Golembeski, Robert J. Jorgensen, Robert D. Cleland, Allen Noshay