Granted Patent
Utility
US 4,731,092 · App. 07/040,664
Process for printing or dyeing cellulose-containing textile material with reactive dyes in aqueous foam preparation containing acrylic graft co-polymer
Inventor:
Hans-Ulrich Berendt
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Apr 20, 1987
Inventor
Hans-Ulrich Berendt
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.