Granted Patent
Utility
US 6,174,357 · App. 09/357,043
Pigment-based ink compositions
Inventor:
William D. Kappele
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Jul 20, 1999
Inventor
William D. Kappele
Assignee (at issue)
Lexmark International, Inc.
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.