Granted Patent
Utility
US 6,121,394 · App. 08/450,735
Metallocene-catalyzed olefin polymerization in the absence of aluminoxane
Inventors:
Ryuichi Sugimoto, Tadashi Asanuma, Tutomu Iwatani, Katsumi Takeuchi, Osamu Uchida
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: May 25, 1995
Inventors
Ryuichi Sugimoto
Tadashi Asanuma
Tutomu Iwatani
Katsumi Takeuchi
Osamu Uchida
Assignee (at issue)
MITSUI CHEMICALS, INC.
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.