Granted Patent
Utility
US 4,518,533 · App. 06/423,350
Azetidinone-4-disulfides as intermediates for thia-aza compounds with a beta-lactam ring
Inventors:
Jacques Gosteli, Ivan Ernest, Robert B. Woodward
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Sep 24, 1982
Inventors
Jacques Gosteli
Ivan Ernest
Robert B. Woodward
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.