Granted Patent
Utility
US 5,091,156 · App. 07/309,563
Waterwalls in a fluidized bed reactor
Inventors:
Lasse K. Ijas, Aimo I. Asikainen, Arto Hotta, Neil R. Raskin, James Stone, Gregory Beavers, David Watson
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Feb 13, 1989
Inventors
Lasse K. Ijas
Aimo I. Asikainen
Arto Hotta
Neil R. Raskin
James Stone
Gregory Beavers
David Watson
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.