Granted Patent
Utility
US 4,512,496 · App. 06/636,911
High pressure feedwater heater closure assembly
Inventor:
John L. Tsou
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Aug 2, 1984
Inventor
John L. Tsou
Assignee (at issue)
McQuay, 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.