Granted Patent
Utility
US 5,705,605 · App. 08/498,847
Process for the preparation of a dyeing auxiliary
Inventors:
Rolf Tittmann, Ruth Roth
Patented Case
View Patent ↗
Granted: Jan 6, 1998
Filed: Jul 6, 1995
Inventors
Rolf Tittmann
Ruth Roth
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.