Granted Patent
Utility
US 4,003,691 · App. 05/606,841
Recirculating burner
Inventor:
Alex Wormser
Patented Case
View Patent ↗
Granted: Jan 18, 1977
Filed: Aug 22, 1975
Inventor
Alex Wormser
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.