Granted Patent
Utility
US 4,879,415 · App. 07/129,425
Process for the preparation of chloronitroanilines and chloronitrophenols
Inventors:
Bernhard Albrecht, Jurgen Beyrich
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Nov 25, 1987
Inventors
Bernhard Albrecht
Jurgen Beyrich
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.