Granted Patent
Utility
US 5,677,408 · App. 08/448,502
Propylene elastomer and process for preparation thereof
Inventors:
Takashi Ueda, Akira Mizuno, Masaaki Kawasaki, Daisuke Fukuoka, Yoshihisa Kiso, Tatsuya Tanizaki, Mikio Hashimoto, Masahiro Sugi, Toshiyuki Tsutsui
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Jun 5, 1995
Inventors
Takashi Ueda
Akira Mizuno
Masaaki Kawasaki
Daisuke Fukuoka
Yoshihisa Kiso
Tatsuya Tanizaki
Mikio Hashimoto
Masahiro Sugi
Toshiyuki Tsutsui
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.