Granted Patent
Utility
US 6,583,273 · App. 09/564,766
Azo dyes, process for their preparation and their use for dyeing or printing natural or synthetic materials
Inventors:
Jean-Pierre Bacher, Jean-Marie Adam
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: May 4, 2000
Inventors
Jean-Pierre Bacher
Jean-Marie Adam
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.