Granted Patent
Utility
US 6,031,083 · App. 09/272,881
Disazo dyestuffs
Inventors:
Klaus Kunde, Wolfgang Zarges
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Mar 19, 1999
Inventors
Klaus Kunde
Wolfgang Zarges
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.