Granted Patent
Utility
US 5,856,474 · App. 08/732,501
Cephalosporin synthesis
Inventors:
Gerd Ascher, Johannes Ludescher, Hubert Sturm, Josef Wieser
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Oct 23, 1996
Inventors
Gerd Ascher
Johannes Ludescher
Hubert Sturm
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.