N--2--chlorobenzyl--2--oxo and n--2--chlorobenzyl--2,2--dioxo--1,2,3--oxathiazolidine derivatives, their preparation and synthesis of thieno[3,2--c]pyridine derivatives therefrom

Granted: May 14, 1996 Filed: May 19, 1994

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.