Granted Patent
Utility
US 5,739,299 · App. 08/676,234
Monoazo dyes which are free from water-solubilizing groups and which contain a fluorosulphonyl group and process for colouring polyamides and polyester materials therewith
Inventor:
Nigel Hall
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Jul 15, 1996
Inventor
Nigel Hall
Assignee (at issue)
Zeneca Limited
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.