Granted Patent
Utility
US 4,600,762 · App. 06/639,069
Randum 1-butene copolymer
Inventors:
Kunisuke Fukui, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Aug 9, 1984
Inventors
Kunisuke Fukui
Norio Kashiwa
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.