Granted Patent
Utility
US 4,733,621 · App. 07/047,308
Apparatus and methods for operating a fluidized bed reactor
Inventors:
Markku Kostamo, Martti Puhakka
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: May 8, 1987
Inventors
Markku Kostamo
Martti Puhakka
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.