Granted Patent
Utility
US 5,535,687 · App. 08/296,233
Circulating fluidized bed repowering to reduce Sox and Nox emissions from industrial and utility boilers
Inventor:
Ramesh Khanna
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Aug 25, 1994
Inventor
Ramesh Khanna
Assignee (at issue)
Raytheon Engineers & Constructors, 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.