Granted Patent
Utility
US 4,994,615 · App. 07/079,054
Process for the preparation of optically active secondary arylamines
Inventors:
Felix Spindler, Benoit Pugin
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Jul 29, 1987
Inventors
Felix Spindler
Benoit Pugin
Assignee (at issue)
Ciba-Geigy
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.