Granted Patent
Utility
US 4,944,768 · App. 07/309,921
Solid formulation of anionic wool dyes with anionic dispersant and amphoteric surfactant: glycine or betaine
Inventors:
Paolo Balliello, Otto Schilling, Beat Bruttel
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Feb 13, 1989
Inventors
Paolo Balliello
Otto Schilling
Beat Bruttel
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.