Granted Patent
Utility
US 5,001,227 · App. 06/669,942
Fibre-reactive 1:1 chromium complex azo or azomethine dyes having a bidentate chelating group and a monofunctional neutral ligand
Inventors:
Hans U. Schutz, Ulrich Schlesinger, Gerhard Back
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Nov 9, 1984
Inventors
Hans U. Schutz
Ulrich Schlesinger
Gerhard Back
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.