Granted Patent
Utility
US 4,845,203 · App. 07/092,794
Fibre-reaction disazo dyes with a bi-reaction moiety comprising a halotriazine and vinylsulfonyl type radical
Inventors:
Rolf A. H. Dietz, Herbert Seiler
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Sep 3, 1987
Inventors
Rolf A. H. Dietz
Herbert Seiler
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.