Granted Patent
Utility
US 3,994,665 · App. 05/612,670
Recirculating burner
Inventor:
Henry J. Young
Patented Case
View Patent ↗
Granted: Nov 30, 1976
Filed: Sep 12, 1975
Inventor
Henry J. Young
Assignee (at issue)
Consolidated Natural Gas Service Company, 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.