Patents by Inventor Ronald P. Van Gaalen

Ronald P. Van Gaalen 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).

  • Olefin polymerization catalysts
    Patent number: 5081087
    Abstract: A process for preparing an olefin polymerization catalyst which comprises halogenating a magnesium-di-(3-halo- or 3- C.sub.1 to C.sub.8 alkoxy-phenoxide) with a halide of tetravalent titanium in the presence of a halohydrocarbon, recovering the solid reaction product from the reaction mixture and combining the solid reaction product with an organo aluminium compound and an electron donor.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: January 14, 1992
    Assignee: Shell Research Limited
    Inventors: Alan Villena, Ronald P. Van Gaalen, John C. Chadwick, Theodorus K. Jurriens