Granted Patent
Utility
US 4,940,663 · App. 07/209,932
Fermentation process for the production of xanthane
Inventor:
Bruno Eyssautier
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Jun 22, 1988
Inventor
Bruno Eyssautier
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.