Granted Patent
Utility
US 4,305,460 · App. 06/168,577
Heat transfer tube
Inventor:
Jack S. Yampolsky
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Jul 14, 1980
Inventor
Jack S. Yampolsky
Assignee (at issue)
General Atomics
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.