Granted Patent
Utility
US 4,822,840 · App. 07/106,585
Low-crystalline propylene random copolymer composition, process for production thereof, and polypropylene composite laminated structure
Inventors:
Mamoru Kioka, Masahiro Sugi, Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Oct 9, 1987
Inventors
Mamoru Kioka
Masahiro Sugi
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.