Granted Patent
Utility
US 5,772,969 · App. 08/340,875
Method and apparatus for recovering heat in a fluidized bed reactor
Inventor:
Timo Hyppanen
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 6, 1994
Inventor
Timo Hyppanen
Assignee (at issue)
FOSTER WHEELER ENERGIA OY
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.