Granted Patent
Utility
US 5,712,376 · App. 08/699,957
Azo reactive dyes, their preparation and use
Inventors:
Edmond Ruhlmann, Laszlo Fekete
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Aug 20, 1996
Inventors
Edmond Ruhlmann
Laszlo Fekete
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.