Granted Patent
Utility
US 4,841,884 · App. 07/200,683
Distributor plate for fluidized bed reactor
Inventors:
Folke Engstrom, Reijo Kuivalainen
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: May 26, 1988
Inventors
Folke Engstrom
Reijo Kuivalainen
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.