Granted Patent
Utility
US 4,432,770 · App. 06/442,366
Rapid dyeing of polyester fibers with a mixture of disperse dyes
Inventors:
Rolf Hasler, Beat Henzi, Ernst Schnider, Hermann Ulshoefer
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Nov 17, 1982
Inventors
Rolf Hasler
Beat Henzi
Ernst Schnider
Hermann Ulshoefer
Assignee (at issue)
Sandoz AG
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.