Granted Patent
Utility
US 4,381,383 · App. 06/257,602
Process for producing polyolefins
Inventors:
Masayoshi Hasuo, Yoshinori Suga, Masatoshi Suzuki, Nobuaki Goko, Yasuhiro Nishihara
Patented Case
View Patent ↗
Granted: Apr 26, 1983
Filed: Apr 27, 1981
Inventors
Masayoshi Hasuo
Yoshinori Suga
Masatoshi Suzuki
Nobuaki Goko
Yasuhiro Nishihara
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.