Granted Patent
Utility
US 4,888,444 · App. 07/114,992
Substituted hydroxylamine ester stabilizers
Inventors:
Ramanathan Ravichandran, Stephen D. Pastor
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Oct 26, 1987
Inventors
Ramanathan Ravichandran
Stephen D. Pastor
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.