Granted Patent
Utility
US 4,290,941 · App. 06/069,480
Stabilization systems from triarylphosphites and phenols
Inventors:
Horst Zinke, Hans J. Lorenz, Helmut Linhart
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Aug 24, 1979
Inventors
Horst Zinke
Hans J. Lorenz
Helmut Linhart
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.