Granted Patent
Utility
US 4,515,596 · App. 06/514,071
Process for aftertreating dyed fibrous material made of or containing cellulose
Inventors:
Hans-Ulrich Berendt, Marielise Pacher
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Jul 15, 1983
Inventors
Hans-Ulrich Berendt
Marielise Pacher
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.