Granted Patent
Utility
US 6,231,653 · App. 09/210,935
Dye compositions
Inventors:
Aidan Joseph Lavery, Janette Watkinson
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Dec 15, 1998
Inventors
Aidan Joseph Lavery
Janette Watkinson
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.