Granted Patent
Utility
US 4,997,964 · App. 07/338,416
Iridium complexes and the use thereof
Inventor:
Jurgen Kaschig
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Apr 12, 1989
Inventor
Jurgen Kaschig
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.