Granted Patent
Utility
US 4,690,635 · App. 06/887,441
High temperature burner assembly
Inventor:
William P. Coppin
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jul 21, 1986
Inventor
William P. Coppin
Assignee (at issue)
Maxon, LLC
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.