Granted Patent
Utility
US 5,204,474 · App. 07/709,688
2,6-diarylpiperidin-1-yl substituted 2-butene stabilizers
Inventors:
Glen T. Cunkle, Joseph E. Babiarz
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jun 3, 1991
Inventors
Glen T. Cunkle
Joseph E. Babiarz
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.