Granted Patent
Utility
US 5,279,656 · App. 07/973,666
Xanthene dyes for ink jet printing
Inventors:
Ronald W. Kenyon, Peter Gregory
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Nov 9, 1992
Inventors
Ronald W. Kenyon
Peter Gregory
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES 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.