Granted Patent
Utility
US 5,779,740 · App. 08/752,299
Process for dichromatic or trichromatic dyeing or printing
Inventors:
Urs Lehmann, Marcel Frick, Klaus Hannemann
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Nov 19, 1996
Inventors
Urs Lehmann
Marcel Frick
Klaus Hannemann
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.