Granted Patent
Utility
US 4,547,552 · App. 06/680,227
Process for producing a chemically blended propylene polymer composition and the composition produced by said process
Inventors:
Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Dec 10, 1984
Inventors
Akinori Toyota
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.