Granted Patent
Utility
US 5,230,868 · App. 07/332,730
Fluidized bed reactor with protected fluid distributor
Inventor:
Folke Engstrom
Patented Case
View Patent ↗
Granted: Jul 27, 1993
Filed: Apr 4, 1989
Inventor
Folke Engstrom
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.