Granted Patent
Utility
US 4,316,966 · App. 06/197,530
Process for producing chemically blended propylene resin composition
Inventors:
Hideo Mineshima, Nobuo Sato, Susumu Masaki
Patented Case
View Patent ↗
Granted: Feb 23, 1982
Filed: Oct 16, 1980
Inventors
Hideo Mineshima
Nobuo Sato
Susumu Masaki
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.