Granted Patent
Utility
US 5,006,662 · App. 07/423,721
Manufacturing process for a naphthotriazole stilbene fluorescent agent
Inventors:
Richard B. Lund, Glenn William Brown, JR.
Patented Case
View Patent ↗
Granted: Apr 9, 1991
Filed: Oct 19, 1989
Inventors
Richard B. Lund
Glenn William Brown, JR.
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.