Granted Patent
Utility
US 5,502,223 · App. 08/343,050
Process for preparation of .DELTA..sup.4,9(11),16 pregnatriene-3,20-diones
Inventors:
Francis Brion, Jean Buendia, Christian Diolez, Michel Vivat
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: Feb 21, 1995
Inventors
Francis Brion
Jean Buendia
Christian Diolez
Michel Vivat
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.