Granted Patent
Utility
US 6,015,439 · App. 09/249,756
Deep black dye mixtures of fiber-reactive azo dyes and a process for dyeing hydroxy and/or carboxamido containing fibers
Inventors:
Ron Pedemonte, Andreas Stroben
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Feb 16, 1999
Inventors
Ron Pedemonte
Andreas Stroben
Assignee (at issue)
DyStar Textifarben GmbH & Co.
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.