Granted Patent
Utility
US 6,281,340 · App. 09/551,999
Water-soluble disazo compound having arylcarboxamide diazo components, preparation thereof and use thereof
Inventor:
Joachim Eichhorn
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Apr 19, 2000
Inventor
Joachim Eichhorn
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.