Granted Patent
Utility
US 5,629,331 · App. 08/544,027
Process for the preparation of a tetrazole derivative in two crystalline forms and novel the crystalline forms thereof
Inventors:
Antoine Caron, Dominique Chantreux, Colette Bouloumie
Patented Case
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Granted: May 13, 1997
Filed: Oct 17, 1995
Inventors
Antoine Caron
Dominique Chantreux
Colette Bouloumie
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.