Granted Patent
Utility
US 4,424,159 · App. 06/345,309
Process for the synthesis of the hydroxyacetyl side-chain of steroids of the pregnane type, novel 21-hydroxy-20-oxo-17.alpha.-pregnane compounds and pharmaceutical preparations containing them
Inventor:
Michel Biollaz
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Feb 3, 1982
Inventor
Michel Biollaz
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.