Granted Patent
Utility
US 6,469,112 · App. 09/930,520
(Cycloalkyl)methyl silanes as external donors for polyolefin catalysts
Inventors:
Chung-Ping Cheng, Michael Spencer
Patented Case
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Granted: Oct 22, 2002
Filed: Aug 15, 2001
Inventors
Chung-Ping Cheng
Michael Spencer
Assignee (at issue)
Engelhard Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.