Granted Patent
Utility
US 4,806,528 · App. 07/093,436
Process for the preparation of 2-(2-chloroethoxy)-benzenesulfonamide
Inventor:
Reinhard Georg Hanreich
Patented Case
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Granted: Feb 21, 1989
Filed: Sep 4, 1987
Inventor
Reinhard Georg Hanreich
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.