Granted Patent
Utility
US 5,491,221 · App. 08/247,154
Fibre-reactive copper-complex formazan compounds which contain a difluoropyrimidinyl group
Inventors:
Markus Gisler, Roland Wald
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: May 20, 1994
Inventors
Markus Gisler
Roland Wald
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.