Granted Patent
Utility
US 6,613,104 · App. 09/757,808
Process for preparing dyes and/or brightener formulations
Inventors:
Wolfgang Zarges, Rolf Brockmann, Erwin Bacher, Detlef Szeymies
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Jan 10, 2001
Inventors
Wolfgang Zarges
Rolf Brockmann
Erwin Bacher
Detlef Szeymies
Assignee (at issue)
Bayer Aktiengesellschaft
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.