Granted Patent
Utility
US 4,525,547 · App. 06/594,957
Process for producing ethylene copolymer by gaseous phase copolymerization
Inventors:
Akifumi Kato, Junichi Yoshida, Ryoichi Yamamoto
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Apr 2, 1984
Inventors
Akifumi Kato
Junichi Yoshida
Ryoichi Yamamoto
Assignee (at issue)
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.