Granted Patent
Utility
US 5,878,699 · App. 08/018,859
Process furnace
Inventors:
Daniel Joseph Barnett, Gregory Bryan Cargle, C. Steven Lancaster
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Feb 5, 1998
Inventors
Daniel Joseph Barnett
Gregory Bryan Cargle
C. Steven Lancaster
Assignee (at issue)
The M.W. Kellogg Company
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.