Granted Patent
Utility
US 5,011,950 · App. 07/151,594
Aromatic amine derivatives
Inventors:
Daisuke Fukuoka, Katsuya Takahashi, Isao Hashimoto
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Feb 2, 1988
Inventors
Daisuke Fukuoka
Katsuya Takahashi
Isao Hashimoto
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.