C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
C10L7/00—Fuels produced by solidifying fluid fuels
C10L7/02—Fuels produced by solidifying fluid fuels liquid fuels
American Patents: 216,518 Processes of converting crude petroleum, without practically changing its volume, into a uniform, purified and deodorized oil, which may be distilled without the coming over of naphtha, etc.