Granted Patent
Utility
US 6,288,217 · App. 09/642,136
Black azo dyes
Inventors:
Bradley Beach, Ann P. Holloway, James F. Feeman
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Aug 18, 2000
Inventors
Bradley Beach
Ann P. Holloway
James F. Feeman
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.