Granted Patent
Utility
US 4,323,701 · App. 06/232,763
Process for the preparation of indenonecarboxylic acids
Inventors:
Hans Bosshard, Hermann Rempfler, Hans Zweifel
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Feb 9, 1981
Inventors
Hans Bosshard
Hermann Rempfler
Hans Zweifel
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.