Granted Patent
Utility
US 4,845,220 · App. 07/139,562
Vattable 2-aryl-4,6-diaminopyrimidines
Inventor:
Hans Altermatt
Patented Case
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Granted: Jul 4, 1989
Filed: Dec 30, 1987
Inventor
Hans Altermatt
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.