Granted Patent
Utility
US 4,528,374 · App. 06/319,352
Polyalkylpiperidines
Inventor:
Erwin Nikles
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Nov 9, 1981
Inventor
Erwin Nikles
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.