Granted Patent
Utility
US 4,668,721 · App. 06/825,722
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 26, 1987
Filed: Feb 3, 1986
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.