Granted Patent
Utility
US 4,289,880 · App. 06/056,664
Cationic oxazine dyes
Inventor:
Peter Moser
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 11, 1979
Inventor
Peter Moser
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.