Granted Patent
Utility
US 5,899,172 · App. 08/834,617
Separated overfire air injection for dual-chambered furnaces
Inventors:
John V. Dallen, Steven B. Fothergill
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Apr 14, 1997
Inventors
John V. Dallen
Steven B. Fothergill
Assignee (at issue)
Combustion Engineering, 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.