Granted Patent
Utility
US 4,904,628 · App. 07/149,894
Components and catalysts for the polymerization of olefins
Inventors:
Enrico Albizzati, Sandro Parodi, Pier C. Barbe
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jan 28, 1988
Inventors
Enrico Albizzati
Sandro Parodi
Pier C. Barbe
Assignees (at issue)
Montedison S.p.A.
Mitsu Petrochemical Ind., Ltd.
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.