Granted Patent
Utility
US 4,248,868 · App. 06/014,454
Cephem carbonylmethyl derivatives
Inventors:
Riccardo Scartazzini, Hans Bickel
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Feb 23, 1979
Inventors
Riccardo Scartazzini
Hans Bickel
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.