Granted Patent
Utility
US 6,470,835 · App. 10/024,086
Plate-type heat exchanger for exhaust gas heat recovery
Inventors:
Tod A. Stansfield, Wilfred L. Ayala, Stephen R. Wilkinson, Brian Huibregtse, Todd Anderson, Hyunjae Park
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Dec 17, 2001
Inventors
Tod A. Stansfield
Wilfred L. Ayala
Stephen R. Wilkinson
Brian Huibregtse
Todd Anderson
Hyunjae Park
Assignee (at issue)
Aqua-Chem, 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.