Granted Patent
Utility
US 4,338,781 · App. 06/102,199
Rotating fluidized bed combustor
Inventors:
William H. Belke, George B. Grim
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Nov 1, 1979
Inventors
William H. Belke
George B. Grim
Assignee (at issue)
Caterpillar Tractor Co.
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.