Granted Patent
Utility
US 5,672,574 · App. 08/530,974
Stabilizers for organic materials
Inventors:
Samuel Evans, Stephan Allenbach
Patented Case
View Patent ↗
Granted: Sep 30, 1997
Filed: Sep 20, 1995
Inventors
Samuel Evans
Stephan Allenbach
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.