Granted Patent
Utility
US 4,768,446 · App. 07/036,231
Coal combustion system
Inventors:
Colin Wilkes, Hukam Chand Mongia, Peter C. Tramm
Patented Case
View Patent ↗
Granted: Sep 6, 1988
Filed: Apr 9, 1987
Inventors
Colin Wilkes
Hukam Chand Mongia
Peter C. Tramm
Assignee (at issue)
General Motors 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.