Granted Patent
Utility
US 5,969,112 · App. 09/055,007
Yellow cationic dyes having flocculating properties
Inventors:
James F. Feeman, Jing X. Sun
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Apr 3, 1998
Inventors
James F. Feeman
Jing X. Sun
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.