Granted Patent
Utility
US 5,599,885 · App. 08/461,950
Process for the preparation of polyolefin
Inventors:
Masaaki Kawasaki, Yoshio Miyake, Tomoko Sueyoshi, Atsuo Kobata
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Jun 5, 1995
Inventors
Masaaki Kawasaki
Yoshio Miyake
Tomoko Sueyoshi
Atsuo Kobata
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.