Granted Patent
Utility
US 4,659,792 · App. 06/814,166
Process for production of 4-methyl-1-pentene polymer or copolymer
Inventors:
Norio Kashiwa, Kunisuke Fukui
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Dec 23, 1985
Inventors
Norio Kashiwa
Kunisuke Fukui
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.