Granted Patent
Utility
US 5,690,168 · App. 08/743,020
Quench exchanger
Inventors:
Lloyd Edward Cizmar, Larry G. Hackemesser, William E. Phillips
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Nov 4, 1996
Inventors
Lloyd Edward Cizmar
Larry G. Hackemesser
William E. Phillips
Assignee (at issue)
The M.W. Kellogg 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.