Granted Patent
Utility
US 5,502,742 · App. 08/023,354
Heat treating furnace with removable floor, adjustable heating element support, and threaded ceramic gas injection nozzle
Inventors:
Charles Kellogg, Charles J. Schmidt
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: Feb 26, 1993
Inventors
Charles Kellogg
Charles J. Schmidt
Assignee (at issue)
Abar Ipsen Industries, 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.