Granted Patent
Utility
US 5,773,593 · App. 08/769,701
B15-A20 dyes and inks based thereon
Inventors:
Peter Gregory, Ronald Wynford Kenyon, Paul Wight
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 18, 1996
Inventors
Peter Gregory
Ronald Wynford Kenyon
Paul Wight
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.