Granted Patent
Utility
US 4,692,442 · App. 06/208,105
6-substituted penem compounds
Inventors:
Jacques Gosteli, Ivan Ernest, Marc Lang, Robert B. Woodward
Patented Case
View Patent ↗
Granted: Sep 8, 1987
Filed: Nov 18, 1980
Inventors
Jacques Gosteli
Ivan Ernest
Marc Lang
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.