Granted Patent
Utility
US 4,542,197 · App. 06/553,060
Polymerization catalyst
Inventors:
Umberto Giannini, Paolo Longi, Domenico F. Deluca, Bruno Pivotto
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Nov 18, 1983
Inventors
Umberto Giannini
Paolo Longi
Domenico F. Deluca
Bruno Pivotto
Assignee (at issue)
Montecatini Edison S.p.A.
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.