Granted Patent
Utility
US 4,274,829 · App. 05/948,620
Continuous dyeing process in organic solvent vapors
Inventor:
Jacques Zurbuchen
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Oct 4, 1978
Inventor
Jacques Zurbuchen
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.