Granted Patent
Utility
US 4,298,692 · App. 06/112,898
Fermentation process for producing a rifamycin derivative
Inventors:
Thomas Schupp, Peter Traxler, Jakob Nuesch
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Jan 17, 1980
Inventors
Thomas Schupp
Peter Traxler
Jakob Nuesch
Assignee (at issue)
Ciba-Geigy
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.