Granted Patent
Utility
US 4,508,784 · App. 06/572,973
4-Styryl-4'-vinylbiphenyls, the production thereof and use thereof as fluorescent
Inventor:
Leonardo Guglielmetti
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Jan 23, 1984
Inventor
Leonardo Guglielmetti
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.