Granted Patent
Utility
US 4,313,733 · App. 06/120,233
Assistant mixture for the dyeing or fluorescent brightening
Inventors:
Jacques Zurbuchen, Alain Lauton, Jean P. Luttringer
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Feb 11, 1980
Inventors
Jacques Zurbuchen
Alain Lauton
Jean P. Luttringer
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.