Granted Patent
Utility
US 5,033,413 · App. 07/547,561
Fluidized bed combustion system and method utilizing capped dual-sided contact units
Inventors:
Frederick A. Zenz, James J. Colyar, Allen Li
Patented Case
View Patent ↗
Granted: Jul 23, 1991
Filed: Jul 2, 1990
Inventors
Frederick A. Zenz
James J. Colyar
Allen Li
Assignee (at issue)
HRI
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.