Granted Patent
Utility
US 4,492,691 · App. 06/394,368
Azatetracyclic carbonitriles
Inventors:
Hans Blattner, Angelo Storni
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jul 1, 1982
Inventors
Hans Blattner
Angelo Storni
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.