Granted Patent
Utility
US 6,451,072 · App. 09/535,916
Reactive dyes, process for their preparation and their use
Inventors:
Athanassios Tzikas, Rolf Deitz
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Mar 24, 2000
Inventors
Athanassios Tzikas
Rolf Deitz
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.