Granted Patent
Utility
US 6,076,597 · App. 09/001,639
Helical coil heat exchanger with removable end plates
Inventors:
Frank Manning, Ronald L. Grace
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Dec 31, 1997
Inventors
Frank Manning
Ronald L. Grace
Assignee (at issue)
Flowserve Management 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.