Patents by Inventor Daniel P. Zilker

Daniel P. Zilker 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).

  • Catalyst precursor production
    Patent number: 5034361
    Abstract: Normally sparingly soluble magnesium alkoxide is solubilized in alkanol by the additional presence of certain acidic materials. The resulting solution is used to produce a mixture of substantially spherical particles, substantially free of fines, containing an adduct magnesium alkoxide. The particles are converted by conventional methods to a procatalyst precursor of an olefin polymerization catalyst of good activity and good selectivity to stereoregular polymer whenever appropriate, which catalyst produces polymer product of good morphology.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: July 23, 1991
    Assignees: Shell Oil Company, Union Carbide Chemicals and Plastics Company, Inc.
    Inventors: Robert C. Job, Daniel P. Zilker, Jr., John C. Chadwick