Granted Patent
Utility
US 5,650,509 · App. 08/541,005
Sterically hindered phenols
Inventors:
Jean-Pierre Bacher, Manfred Rembold, Dieter Reinehr
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Oct 11, 1995
Inventors
Jean-Pierre Bacher
Manfred Rembold
Dieter Reinehr
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.