Granted Patent
Utility
US 4,927,921 · App. 07/128,997
Novel 23-keto-steroids
Inventors:
Michel Vivat, Jean Buendia
Patented Case
View Patent ↗
Granted: May 22, 1990
Filed: Dec 4, 1987
Inventors
Michel Vivat
Jean Buendia
Assignee (at issue)
Roussel Uclaf
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.