Granted Patent
Utility
US 4,978,768 · App. 07/001,311
Process for the preparation of alkyl esters of tetrachloro-2-cyano-benzoic acid
Inventors:
Jost von der Crone, Gonzague Overney, Peter Dario
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Jan 8, 1987
Inventors
Jost von der Crone
Gonzague Overney
Peter Dario
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.