Granted Patent
Utility
US 6,419,346 · App. 09/770,723
Two-step trench etch for a fully integrated thermal inkjet printhead
Inventor:
Eric L. Nikkel
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jan 25, 2001
Inventor
Eric L. Nikkel
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.