Granted Patent
Utility
US 4,518,392 · App. 06/512,093
Process for the HT dyeing of polyester materials with ethylene oxide propylene oxide block polymer
Inventors:
Hans Mollet, Paul Dussy
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Jul 8, 1983
Inventors
Hans Mollet
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.