Granted Patent
Utility
US 4,404,388 · App. 06/292,847
Process for producing 2-chloropyridines
Inventors:
Hansjakob Fah, Alfred Grieder
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Aug 14, 1981
Inventors
Hansjakob Fah
Alfred Grieder
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.