Granted Patent
Utility
US 4,368,305 · App. 06/213,998
Process for producing olefin polymers
Inventors:
Toru Tanaka, Eiji Tanaka
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Aug 1, 1980
Inventors
Toru Tanaka
Eiji Tanaka
Assignee (at issue)
Mitsubishi Chemical 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.