Granted Patent
Utility
US 4,725,506 · App. 06/913,676
Chlorinated polyolefins
Inventor:
Riichiro Nagano
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: Sep 12, 1986
Inventor
Riichiro Nagano
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.