Granted Patent
Utility
US 4,390,735 · App. 06/310,709
Process for the preparation of p-allylphenols
Inventor:
Siegfried Rosenberger
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Oct 13, 1981
Inventor
Siegfried Rosenberger
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.