Granted Patent
Utility
US 4,395,519 · App. 06/196,550
Physically blended propylene polymer composition
Inventors:
Syuji Minami, Norio Kashiwa, Akifumi Kato, Junichi Watanabe
Patented Case
View Patent ↗
Granted: Jul 26, 1983
Filed: Oct 14, 1980
Inventors
Syuji Minami
Norio Kashiwa
Akifumi Kato
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.