Granted Patent
Utility
US 4,237,293 · App. 05/955,043
Metal complexes of azomethines
Inventors:
Francois L'Eplattenier, Andre Pugin, Jost von der Crone
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Oct 26, 1978
Inventors
Francois L'Eplattenier
Andre Pugin
Jost von der Crone
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.