Granted Patent
Utility
US 4,307,209 · App. 06/167,141
Process for production of chemically blended composition of non-elastomeric ethylene resins
Inventors:
Yoshinori Morita, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Jul 9, 1980
Inventors
Yoshinori Morita
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.