Granted Patent
Utility
US 4,618,440 · App. 06/815,772
Substituted 4-hydroxybenzylthio aldehyde and ketone stabilizers
Inventors:
David H. Steinberg, John J. Luzzi, Frank P. Cortolano
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Jan 2, 1986
Inventors
David H. Steinberg
John J. Luzzi
Frank P. Cortolano
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.