Granted Patent
Utility
US 6,086,639 · App. 09/265,256
Black dye mixtures of fiber-reactive azo dyes and use thereof for dyeing hydroxy- and/or carboxamido-containing fiber material
Inventors:
Joachim Steckelberg, Werner Russ, Christian Schumacher, Ron Pedemonte
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Mar 9, 1999
Inventors
Joachim Steckelberg
Werner Russ
Christian Schumacher
Ron Pedemonte
Assignee (at issue)
DyStar Textilfarben GmbH & Co. Deutschland KG
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.