Granted Patent
Utility
US 4,408,944 · App. 06/204,784
Conveyor for removal of bed drain material from a coal-burning fluidized bed combustor
Inventor:
Robert F. Christian
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Nov 7, 1980
Inventor
Robert F. Christian
Assignee (at issue)
Jude Engineering, Inc.
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.