Granted Patent
Utility
US 4,533,505 · App. 06/360,017
Process for the preparation of styrene derivatives and/or stilbene derivatives
Inventor:
Alwyn Spencer
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Mar 19, 1982
Inventor
Alwyn Spencer
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.