Granted Patent
Utility
US 4,987,260 · App. 07/283,846
Preparation of anilines
Inventors:
Mitsuki Yasuhara, Fujihisa Matsunaga
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Dec 13, 1988
Inventors
Mitsuki Yasuhara
Fujihisa Matsunaga
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.