Granted Patent
Utility
US 5,989,326 · App. 09/017,588
Dyes for ink jet printing
Inventor:
Heinz Peter
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Feb 3, 1998
Inventor
Heinz Peter
Assignee (at issue)
Ilford Imaging Switzerland GmbH
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.