Granted Patent
Utility
US 4,804,599 · App. 07/203,524
Optical sensitizing dyes
Inventor:
Geoffrey E. Ficken
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: May 24, 1988
Inventor
Geoffrey E. Ficken
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.