Granted Patent
Utility
US 6,090,163 · App. 09/217,355
Red-dyeing dye mixtures of water-soluble fiber-reactive azo dyes and their use
Inventors:
Joachim Steckelberg, Ronald Pedemonte
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Dec 21, 1998
Inventors
Joachim Steckelberg
Ronald 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.