Granted Patent
Utility
US 4,349,671 · App. 06/241,141
Process for the production of metal complexes of isoindoline azines
Inventors:
Abul Iqbal, Paul Lienhard
Patented Case
View Patent ↗
Granted: Sep 14, 1982
Filed: Mar 5, 1981
Inventors
Abul Iqbal
Paul Lienhard
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.