Granted Patent
Utility
US 6,090,165 · App. 09/021,326
Dye mixtures and their use
Inventor:
Roger Lacroix
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Feb 10, 1998
Inventor
Roger Lacroix
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.