Granted Patent
Utility
US 4,672,918 · App. 06/734,716
Circulating fluidized bed reactor temperature control
Inventors:
Folke Engstrom, Juha Sarkki
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: May 16, 1985
Inventors
Folke Engstrom
Juha Sarkki
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.