Granted Patent
Utility
US 5,509,461 · App. 08/161,107
Gas-gas heater protection system and method
Inventor:
Paul Jason Williams
Patented Case
View Patent ↗
Granted: Apr 23, 1996
Filed: Dec 2, 1993
Inventor
Paul Jason Williams
Assignee (at issue)
The Babcock & Wilcox 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.