Granted Patent
Utility
US 4,601,113 · App. 06/727,950
Method and apparatus for fluidized steam drying of low-rank coals
Inventors:
Robert Draper, Robert W. Wolfe
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Apr 26, 1985
Inventors
Robert Draper
Robert W. Wolfe
Assignee (at issue)
Westinghouse Electric Company LLC
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.