Granted Patent
Utility
US 6,440,957 · App. 09/667,075
Cephalosporines having cyclic aminoguanidine substituents as antibiotics
Inventors:
Gerd Ascher, Werner Heilmayer, Johannes Ludescher, Johannes Hildebrandt, Michael Schranz, Josef Wieser
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 21, 2000
Inventors
Gerd Ascher
Werner Heilmayer
Johannes Ludescher
Johannes Hildebrandt
Michael Schranz
Josef Wieser
Assignee (at issue)
Biochemie Gesellschaft m.b.H
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.