Granted Patent
Utility
US 5,260,442 · App. 07/802,614
Process for the manufacture of crystalline quinolinium salts and their oxidation to 1-alkyl-2-quinolones
Inventors:
Jonathan Hutton, David Waterson
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Dec 5, 1991
Inventors
Jonathan Hutton
David Waterson
Assignees (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
ICI Pharma
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.