Granted Patent
Utility
US 5,310,896 · App. 07/974,484
Process for preparing .DELTA..sup.1,4 -pregnadiene-3,20-diones
Inventors:
Luc Devocelle, Philippe Mackiewicz
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Nov 12, 1992
Inventors
Luc Devocelle
Philippe Mackiewicz
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.