Granted Patent
Utility
US 4,844,710 · App. 07/126,979
Aqueous textile assistant of high storage stability and hard water resistance
Inventors:
Christian Guth, Jorg Haase, Albert Stehlin
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Nov 30, 1987
Inventors
Christian Guth
Jorg Haase
Albert Stehlin
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.