Granted Patent
Utility
US 4,906,413 · App. 07/270,378
Diquaternary ammonium salts and the use thereof as textile finishing agents
Inventors:
Rosemarie Topfl, Heinz Abel, Jorg Binz
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Nov 10, 1988
Inventors
Rosemarie Topfl
Heinz Abel
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.