Granted Patent
Utility
US 6,267,806 · App. 09/205,376
Dye compositions
Inventors:
Aidan Joseph Lavery, John E. Presgrave
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Dec 4, 1998
Inventors
Aidan Joseph Lavery
John E. Presgrave
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.