Granted Patent
Utility
US 4,897,997 · App. 07/233,732
Shell and tube heat pipe condenser
Inventors:
Roelf J. Meijer, Robert P. Verhey
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Aug 19, 1988
Inventors
Roelf J. Meijer
Robert P. Verhey
Assignee (at issue)
Stirling Thermal Motors, 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.