Granted Patent
Utility
US 4,965,401 · App. 07/444,828
Process for the preparation of 2-propyl-2-pentenoic acid and its esters
Inventors:
Marcel Descamps, Georges Sayac
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Dec 1, 1989
Inventors
Marcel Descamps
Georges Sayac
Assignee (at issue)
Sanofi
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.