Granted Patent
Utility
US 5,278,204 · App. 07/975,955
Heat-resistant rubber compositions
Inventors:
Tetsuo Tojo, Katsuo Okamoto, Akira Matsuda, Eckhart Louis
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Nov 13, 1992
Inventors
Tetsuo Tojo
Katsuo Okamoto
Akira Matsuda
Eckhart Louis
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.