Granted Patent
Utility
US 6,538,049 · App. 08/859,901
Ink compositions
Inventors:
William D. Kappele, Anna Marie Pearson
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: May 21, 1997
Inventors
William D. Kappele
Anna Marie Pearson
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.