Granted Patent
Utility
US 4,898,901 · App. 07/330,986
Long chain N-alkyl-alpha-alkyl nitrones and polyolefin compositions stabilized therewith
Inventors:
Ramanathan Ravichandran, Stephen D. Pastor, Raymond Seltzer, Ambelal R. Patel
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Mar 23, 1989
Inventors
Ramanathan Ravichandran
Stephen D. Pastor
Raymond Seltzer
Ambelal R. Patel
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.