Granted Patent
Utility
US 5,973,147 · App. 09/075,004
Process for dichromatic or trichromatic dyeing or printing
Inventors:
Urs Lehmann, Marcel Frick, Klaus Hannemann
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: May 8, 1998
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.