Granted Patent
Utility
US 4,314,818 · App. 06/177,017
"1-Amino-7 -[3'-(5""-chloro-2"",4""-difluoropyrimidyl-6""-amino)-6'-sulfophenylazo]-8-hy droxy-2-sulfamoyl or substituted sulfamoyl-phenylazo naphthalene-3,6-disulfonic acids"
Inventor:
Alfred Courtin
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Aug 11, 1980
Inventor
Alfred Courtin
Assignee (at issue)
Sandoz AG
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.