Granted Patent
Utility
US 4,417,071 · App. 06/357,248
Phenols useful as stabilizers
Inventor:
Siegfried Rosenberger
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Mar 11, 1982
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.