Granted Patent
Utility
US 4,880,433 · App. 07/007,835
Process for aftertreating cellulosic materials printed with reactive dyes
Inventors:
Wolfgang Sutterlin, Raymond Defago
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jan 27, 1987
Inventors
Wolfgang Sutterlin
Raymond Defago
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.