Granted Patent
Utility
US 6,808,618 · App. 09/915,166
Chemical sensing apparatus and methods
Inventor:
Joseph R. Stetter
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Jul 25, 2001
Inventor
Joseph R. Stetter
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.