Granted Patent
Utility
US 5,686,439 · App. 08/573,102
Chelate complexes and processes for their preparation
Inventors:
Hans-Georg Capraro, Marcus Baumann
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Dec 15, 1995
Inventors
Hans-Georg Capraro
Marcus Baumann
Assignee (at issue)
NOVARTIS AG
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.