Granted Patent
Utility
US 5,358,940 · App. 08/022,246
Chelate complexes and processes for their preparation
Inventors:
Hans-Georg Capraro, Marcus Baumann
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Feb 25, 1993
Inventors
Hans-Georg Capraro
Marcus Baumann
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.