Granted Patent
Utility
US 5,137,067 · App. 07/808,139
Hydrophilic and corrosion resistant fins for a heat exchanger
Inventor:
Kenneth W. Espeut
Patented Case
View Patent ↗
Granted: Aug 11, 1992
Filed: Dec 16, 1991
Inventor
Kenneth W. Espeut
Assignee (at issue)
JW Aluminum Company
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.