Granted Patent
Utility
US 6,149,722 · App. 09/240,602
Phthalocyanine dyes, inks containing the same and use thereof in ink jet printing
Inventors:
Colin Dick Robertson, Mark Kenworthy
Patented Case
View Patent ↗
Granted: Nov 21, 2000
Filed: Feb 1, 1999
Inventors
Colin Dick Robertson
Mark Kenworthy
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.