Granted Patent
Utility
US 4,432,771 · App. 06/263,810
Combustible coal/water mixtures for fuels and methods of preparing the same
Inventor:
Edgar W. Sawyer, Jr.
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: May 15, 1981
Inventor
Edgar W. Sawyer, Jr.
Assignee (at issue)
International Telephone and Telegraph 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.