Granted Patent
Utility
US 4,305,941 · App. 06/222,618
Rifamycin XII derivatives, their preparation and anti-bacterial compositions thereof
Inventors:
Leonardo Marsili, Giovanni Franceschi, Aurora Sanfilippo
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Jan 5, 1981
Inventors
Leonardo Marsili
Giovanni Franceschi
Aurora Sanfilippo
Assignee (at issue)
Farmitalia Carlo Erba S.p.A.
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.