Granted Patent
Utility
US 5,116,958 · App. 07/461,497
Disperse dyes which are convertible into a thermomigration fast form
Inventors:
Peter Liechti, Martin Trottmann
Patented Case
View Patent ↗
Granted: May 26, 1992
Filed: Jan 5, 1990
Inventors
Peter Liechti
Martin Trottmann
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.