Granted Patent
Utility
US 4,560,771 · App. 06/656,192
Process for the preparation of 1,2-benzoxathiines
Inventor:
Werner Fory
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Oct 1, 1984
Inventor
Werner Fory
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.