Granted Patent
Utility
US 6,689,845 · App. 09/486,949
Process and apparatus for the gas-phase polymerization
Inventors:
Gabriele Govoni, Massimo Covezzi
Patented Case
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Granted: Feb 10, 2004
Filed: Mar 2, 2000
Inventors
Gabriele Govoni
Massimo Covezzi
Assignee (at issue)
Basell Poliolefine Italia S.r.l.
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.