Granted Patent
Utility
US 6,072,821 · App. 09/088,919
Method for heat treating materials at high temperatures, and a furnace bottom construction for high temperature furnaces
Inventor:
Niclas Axelsson
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Jun 2, 1998
Inventor
Niclas Axelsson
Assignee (at issue)
KANTHAL AB
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.