Granted Patent
Utility
US 5,510,402 · App. 08/158,177
Carboxylic acid esters of hydroxyphenylalkanols as stabilizers
Inventors:
Paul Dubs, Rita Pitteloud
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: Nov 24, 1993
Inventors
Paul Dubs
Rita Pitteloud
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.