Granted Patent
Utility
US 5,476,639 · App. 08/222,862
Fluidized bed reactor system and a method of manufacturing the same
Inventor:
Timo Hyppanen
Patented Case
View Patent ↗
Granted: Dec 19, 1995
Filed: Apr 5, 1994
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.