Granted Patent
Utility
US 4,287,136 · App. 06/159,884
Process for the preparation of O,O-dialkylthionophosphoric acid chlorides
Inventor:
Zdenek Mazour
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Jun 16, 1980
Inventor
Zdenek Mazour
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.