Granted Patent
Utility
US 4,525,554 · App. 06/240,480
Process for polymerizing olefin
Inventors:
Toru Tanaka, Kazutoshi Iwatani, Nobuo Enokido, Atsushi Murakami, Yukio Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Mar 4, 1981
Inventors
Toru Tanaka
Kazutoshi Iwatani
Nobuo Enokido
Atsushi Murakami
Yukio Yamaguchi
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.