Granted Patent
Utility
US 4,345,909 · App. 06/261,994
Process for dyeing or treating textile fibre materials
Inventors:
Christian Guth, Hanspeter Gysin, Jorg Binz
Patented Case
View Patent ↗
Granted: Aug 24, 1982
Filed: May 8, 1981
Inventors
Christian Guth
Hanspeter Gysin
Jorg Binz
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.