Granted Patent
Utility
US 5,680,897 · App. 08/716,670
Plate type heat exchanger with integral feed pipe fixturing
Inventor:
Raymond J. Kilmer
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Sep 12, 1996
Inventor
Raymond J. Kilmer
Assignee (at issue)
General Motors LLC
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.