Granted Patent
Utility
US 4,355,159 · App. 06/149,406
Nickel complex pigments of azines
Inventors:
Abul Iqbal, Paul Lienhard, Andre Pugin
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: May 13, 1980
Inventors
Abul Iqbal
Paul Lienhard
Andre Pugin
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.