Granted Patent
Utility
US 4,209,469 · App. 05/971,135
Process for the production of aryl thiols
Inventors:
Hans Thies, Fred von Kaenel
Patented Case
View Patent ↗
Granted: Jun 24, 1980
Filed: Dec 19, 1978
Inventors
Hans Thies
Fred von Kaenel
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.