Granted Patent
Utility
US 4,957,862 · App. 07/482,710
Microbiological process for the preparation of methyl ketones
Inventors:
Catherine Creuly, Jean-Bernard Gros, Christian Larroche
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Feb 21, 1990
Inventors
Catherine Creuly
Jean-Bernard Gros
Christian Larroche
Assignee (at issue)
Sanofi
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.