Granted Patent
Utility
US 4,822,374 · App. 07/060,288
Process for the aftertreatment of dyed cellulose fibers
Inventors:
Rosemarie Topfl, Jorg Binz
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Jun 10, 1987
Inventors
Rosemarie Topfl
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.