Granted Patent
Utility
US 5,207,799 · App. 07/750,364
Process for dyeing wool and blends thereof with other fibres using reactive dyes and colorless fiber-reactive dyeing assistant
Inventors:
Gerhard Back, Klaus Hannemann, Josef Koller
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Aug 27, 1991
Inventors
Gerhard Back
Klaus Hannemann
Josef Koller
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.