Granted Patent
Utility
US 4,758,667 · App. 07/011,077
Process for the preparation of 2-(imidazolin-2-yl)-3-pyridine- and -3-quinolinecarboxylic acids
Inventors:
Henry Szczepanski, Dieter Durr
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Feb 5, 1987
Inventors
Henry Szczepanski
Dieter Durr
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.