Granted Patent
Utility
US 4,874,847 · App. 07/136,530
Process for the diazotisation of primary aromatic amines which are sparingly soluble in water
Inventors:
Rudiger Oxenius, Ernst Burgi, Vladimir Arnold, Ferenc Rakoczi
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Dec 22, 1987
Inventors
Rudiger Oxenius
Ernst Burgi
Vladimir Arnold
Ferenc Rakoczi
Assignee (at issue)
Ciba-Geigy
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.