Granted Patent
Utility
US 5,011,995 · App. 07/221,403
Process for the preparation of optically active secondary amines
Inventors:
Benoit Pugin, Gerardo Ramos, Felix Spindler
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Jul 19, 1988
Inventors
Benoit Pugin
Gerardo Ramos
Felix Spindler
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.