Granted Patent
Utility
US 6,412,221 · App. 09/630,975
Catalyst door system
Inventor:
Jon Emsbo
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Aug 2, 2000
Inventor
Jon Emsbo
Assignee (at issue)
Thermal Engineering International
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.