Granted Patent
Utility
US 4,255,154 · App. 06/049,711
Process for the level dyeing of polyester material
Inventors:
Jacques Zurbuchen, Paul Dussy
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Jun 18, 1979
Inventors
Jacques Zurbuchen
Paul Dussy
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.