Granted Patent
Utility
US 5,714,538 · App. 08/578,138
Polymeric dispersants for pigmented inks
Inventors:
Bradley Beach, Anna Marie Pearson, Jing Sun, Richard B. Watkins
Patented Case
View Patent ↗
Granted: Feb 3, 1998
Filed: Dec 26, 1995
Inventors
Bradley Beach
Anna Marie Pearson
Jing Sun
Richard B. Watkins
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.