Granted Patent
Utility
US 5,406,914 · App. 08/131,852
Method and apparatus for operating a circulating fluidized bed reactor system
Inventor:
Timo Hyppanen
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Oct 5, 1993
Inventor
Timo Hyppanen
Assignee (at issue)
A. Ahlstrom Corporation
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.