Granted Patent
Utility
US 4,370,144 · App. 06/117,940
Two-phase organic solvent-water dyeing process for polyester fibers
Inventors:
James K. Skelly, David G. Evans, Carl Becker
Patented Case
View Patent ↗
Granted: Jan 25, 1983
Filed: Feb 4, 1980
Inventors
James K. Skelly
David G. Evans
Carl Becker
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.