Granted Patent
Utility
US 4,331,561 · App. 06/116,257
Catalysts for polymerizing alpha-olefins and process for polymerizing alpha-olefins in contact with said catalysts
Inventors:
Luciano Luciani, Norio Kashiwa, Pier C. Barbe, Akinori Toyota
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Jan 28, 1980
Inventors
Luciano Luciani
Norio Kashiwa
Pier C. Barbe
Akinori Toyota
Assignees (at issue)
Montedison S.p.A.
Mitsui Petrochemical Industries, 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.