Granted Patent
Utility
US 6,460,613 · App. 09/790,464
Dual-density header fin for unit-cell plate-fin heat exchanger
Inventors:
James S. Nash, Alexander Haplau-Colan
Patented Case
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Granted: Oct 8, 2002
Filed: Feb 22, 2001
Inventors
James S. Nash
Alexander Haplau-Colan
Assignee (at issue)
Ingersoll Rand Energy Systems Corporation
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.