Granted Patent
Utility
US 4,859,207 · App. 07/221,401
Process for dyeing textile planar fabrics made from polyamides: with melamine compound as resist agent
Inventors:
Thys Bouwknegt, Heinz Abel
Patented Case
View Patent ↗
Granted: Aug 22, 1989
Filed: Jul 19, 1988
Inventors
Thys Bouwknegt
Heinz Abel
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.