Granted Patent
Utility
US 5,043,440 · App. 07/107,050
Oxidation process for preparing 4-acyloxy azetidinones in a two-phase system
Inventors:
Marco Ricci, Maria Altamura, Daniele Bianchi, Walter Cabri, Norberto Gatti
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Oct 13, 1987
Inventors
Marco Ricci
Maria Altamura
Daniele Bianchi
Walter Cabri
Norberto Gatti
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.