Granted Patent
Utility
US 5,344,955 · App. 08/097,098
Preparation of 1-amino-cyan-amido-2,2-dicyanoethylene, sodium salt
Inventor:
Ward H. Oliver
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Jul 26, 1993
Inventor
Ward H. Oliver
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.