Granted Patent
Utility
US 4,118,175 · App. 05/754,114
Fuel burner, arrangement and sleeve therefor and methods
Inventor:
Fred Riehl
Patented Case
View Patent ↗
Granted: Oct 3, 1978
Filed: Dec 27, 1976
Inventor
Fred Riehl
Assignee (at issue)
ROBERTSHAW CONTROLS COMANY
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.