Granted Patent
Utility
US 6,591,215 · App. 09/252,158
Systems and methods for controlling the activity of carbon in heat treating atmospheres
Inventors:
Robert N. Blumenthal, Andreas T. Melville
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Feb 18, 1999
Inventors
Robert N. Blumenthal
Andreas T. Melville
Assignee (at issue)
Furnace Control Corp.
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.