Granted Patent
Utility
US 5,808,071 · App. 08/893,303
Pictet-Spengler reaction for the synthesis of tetrahydroisoquinolines and related heterocyclic compounds
Inventor:
Timothy J. Watson
Patented Case
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Granted: Sep 15, 1998
Filed: Jul 15, 1997
Inventor
Timothy J. Watson
Assignee (at issue)
Hoechst Marion Roussel
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.