Granted Patent
Utility
US 5,206,305 · App. 07/686,381
Chlorinated ethylene-alpha-olefin copolymer rubber and composition thereof
Inventors:
Tetsuo Tojo, Keiji Okada, Yoshiharu Kikuchi, Yasuhiko Otawa, Toshiyuki Maeda, Katsuo Okamoto
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Apr 17, 1991
Inventors
Tetsuo Tojo
Keiji Okada
Yoshiharu Kikuchi
Yasuhiko Otawa
Toshiyuki Maeda
Katsuo Okamoto
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.