Granted Patent
Utility
US 5,744,590 · App. 08/875,071
Monoazo pigments
Inventors:
Alan Chorlton, James A. Mason
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Jul 17, 1997
Inventors
Alan Chorlton
James A. Mason
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.