Granted Patent
Utility
US 4,590,231 · App. 06/633,549
Polyolefin compositions stabilized against degradation using hydroxylamine derivatives
Inventors:
Raymond Seltzer, Ambelal R. Patel, Peter W. Stewart, Charlene White
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Jul 23, 1984
Inventors
Raymond Seltzer
Ambelal R. Patel
Peter W. Stewart
Charlene White
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.