Granted Patent
Utility
US 4,902,439 · App. 07/181,797
Detergent composition for washing off dyeings obtained with fibre-reactive dyes, process for the preparation thereof and use thereof
Inventors:
Heinz Abel, Hans-Ulrich Berenut
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Apr 15, 1988
Inventors
Heinz Abel
Hans-Ulrich Berenut
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.