Granted Patent
Utility
US 5,504,172 · App. 08/255,713
Propylene polymer, propylene copolymer, and propylene elastomer prepared using novel bridged indenyl containing metallocenes
Inventors:
Junichi Imuta, Takashi Ueda, Yoshihisa Kiso, Akira Mizuno, Masaaki Kawasaki, Mikio Hashimoto
Patented Case
View Patent ↗
Granted: Apr 2, 1996
Filed: Jun 7, 1994
Inventors
Junichi Imuta
Takashi Ueda
Yoshihisa Kiso
Akira Mizuno
Masaaki Kawasaki
Mikio Hashimoto
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.