Granted Patent
Utility
US 6,682,573 · App. 09/951,057
Azo disperse dye mixtures
Inventors:
David Brierley, Ian Weddell, David F. Newton
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Sep 13, 2001
Inventors
David Brierley
Ian Weddell
David F. Newton
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.