Granted Patent
Utility
US 4,990,517 · App. 07/375,434
7-(1-pyrrolidinyl)-3-quinolone- and -naphthyridonecarboxylic acid derivatives as antibacterial agents and feed additives
Inventors:
Uwe Petersen, Thomas Schenke, Andreas Krebs, Klaus Grohe, Michael Schriewer, Ingo Haller, Karl G. Metzger, Rainer Endermann, Hans-Joachim Zeiler
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Jun 30, 1989
Inventors
Uwe Petersen
Thomas Schenke
Andreas Krebs
Klaus Grohe
Michael Schriewer
Ingo Haller
Karl G. Metzger
Rainer Endermann
Hans-Joachim Zeiler
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.