Granted Patent
Utility
US 5,412,020 · App. 08/281,610
Propylene polymer compositions
Inventors:
Akihiko Yamamoto, Yurimasa Zenitani, Masayoshi Yamaguchi
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Jul 28, 1994
Inventors
Akihiko Yamamoto
Yurimasa Zenitani
Masayoshi Yamaguchi
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.