Granted Patent
Utility
US 5,212,312 · App. 06/912,174
Vattable and non-vattable quinoid dyes
Inventors:
Jean-Marie Adam, Athanassios Tzikas
Patented Case
View Patent ↗
Granted: May 18, 1993
Filed: Sep 22, 1986
Inventors
Jean-Marie Adam
Athanassios Tzikas
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.