Granted Patent
Utility
US 4,532,059 · App. 06/552,644
Benzylated phenols
Inventor:
Siegfried Rosenberger
Patented Case
View Patent ↗
Granted: Jul 30, 1985
Filed: Nov 17, 1983
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.