Granted Patent
Utility
US 4,523,923 · App. 06/580,908
Solid disperse dye formulations containing non-ionic dispersants for transfer printing inks
Inventors:
Urs Buchel, Paul Muther
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Feb 16, 1984
Inventors
Urs Buchel
Paul Muther
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.