Granted Patent
Utility
US 4,621,114 · App. 06/626,920
Propylene resin composition
Inventor:
Junichi Watanabe
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: Jul 2, 1984
Inventor
Junichi Watanabe
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.