Granted Patent
Utility
US 5,481,039 · App. 08/327,245
"Compositions comprising 2,2',2""-nitrilotriethanol cyclometalates"
Inventors:
Hermann O. Wirth, Hans-Helmut Friedrich
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Oct 21, 1994
Inventors
Hermann O. Wirth
Hans-Helmut Friedrich
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.