Granted Patent
Utility
US 5,093,085 · App. 07/161,141
Fluidized bed reactor method and apparatus
Inventors:
Folke Engstrom, Reijo Kuivalaninen
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Feb 26, 1988
Inventors
Folke Engstrom
Reijo Kuivalaninen
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.