Granted Patent
Utility
US 5,698,651 · App. 08/665,342
Ethylene copolymer rubber, vulcanizable rubber composition containing the copolymer rubber, and process for preparing the copolymer rubber
Inventors:
Masaaki Kawasaki, Toshiyuki Tsutsui, Tetsuo Tojo, Takashi Hakuta
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jun 17, 1996
Inventors
Masaaki Kawasaki
Toshiyuki Tsutsui
Tetsuo Tojo
Takashi Hakuta
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.