Granted Patent
Utility
US 4,777,266 · App. 06/888,909
Process for the preparation of anthraquinoid disperse dyes and mixtures thereof
Inventors:
Pavel Haspra, Alex Nicopoulos
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Jul 22, 1986
Inventors
Pavel Haspra
Alex Nicopoulos
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.