Granted Patent
Utility
US 4,453,944 · App. 06/479,291
Dye stable to dyeing, processes for producing it, and its use for dyeing and printing synthetic and semi-synthetic fibre materials
Inventors:
Peter Liechti, Antoine Clement, Peter Eugster, Kurt Meyer
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Mar 28, 1983
Inventors
Peter Liechti
Antoine Clement
Peter Eugster
Kurt Meyer
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.