Granted Patent
Utility
US 4,332,937 · App. 06/133,161
Naphtholactam compounds
Inventor:
Rudolf Zink
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Mar 24, 1980
Inventor
Rudolf Zink
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.