Granted Patent
Utility
US 4,987,261 · App. 07/393,797
Diaminoindane derivatives
Inventors:
Keizaburo Yamaguchi, Masayuki Ooe, Akihiro Yamaguchi
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Aug 15, 1989
Inventors
Keizaburo Yamaguchi
Masayuki Ooe
Akihiro Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.