Granted Patent
Utility
US 5,370,730 · App. 08/045,303
Dye composition and aqueous ink derived therefrom
Inventors:
Peter Gregory, Ronald Wynford Kenyon, John E. Presgrave
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Apr 12, 1993
Inventors
Peter Gregory
Ronald Wynford Kenyon
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.