Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Inventor
Edward John Hoffman
Warren James Clark
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Individual
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Individual
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Publication date
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Publication of GB190401887ApublicationCriticalpatent/GB190401887A/en
1887. Hoffman, E. J., and Clark, W. J. Jan. 25. Fuel is formed of the following substances, in about the proportions given :-92 parts of coal dust, 3¢ of crude petroleum, 2¢ of resin, and 2 of soda ash. The three last-named ingredients are warmed together to form a plastic binding-agent, and then thoroughly mixed with the coal.