Granted Patent
Utility
US 4,855,422 · App. 06/945,488
Process for the preparation of azoniaspironortropanol esters
Inventors:
Wolf Grimminger, Klaus Gorler, Karl P. Odenthal
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Dec 23, 1986
Inventors
Wolf Grimminger
Klaus Gorler
Karl P. Odenthal
Assignee (at issue)
MADAUS GMBH
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.