Granted Patent
Utility
US 4,374,650 · App. 06/264,479
Bi-flow rotary kiln coal gasification process
Inventor:
Peter G. Garside
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: May 18, 1981
Inventor
Peter G. Garside
Assignee (at issue)
Allis-Chalmers 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.