Granted Patent
Utility
US 4,973,590 · App. 07/181,809
Process for the preparation of quinolonecarboxylic acids which can be administered parenterally
Inventors:
Michael Preiss, Ulrich Schorsch, Arthur Haaf, Paul Naab, Rudolf Zerbes
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Apr 15, 1988
Inventors
Michael Preiss
Ulrich Schorsch
Arthur Haaf
Paul Naab
Rudolf Zerbes
Assignee (at issue)
Bayer Aktiengesellschaft
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.