Granted Patent
Utility
US 4,640,347 · App. 06/600,478
Heat pipe
Inventors:
George M. Grover, Robert H. Chrisman
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Apr 16, 1984
Inventors
George M. Grover
Robert H. Chrisman
Assignee (at issue)
Q-Dot, 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.