Granted Patent
Utility
US 4,923,391 · App. 07/180,445
Regenerative burner
Inventor:
Gregory M. Gitman
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Apr 12, 1988
Inventor
Gregory M. Gitman
Assignee (at issue)
American Combustion, 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.