Method of liquefying brown coal

Method of operating a wormgear drive at high energy efficiency

Method of operating an oil shale kiln

Method of pre-heating particles of a hydrocarbon-bearing substra

Method of processing oil-shale or tar sand

Method of recovery of oil and bitumen from oil-sands and oil sha

Method of reducing sludge accumulation from tar sands hot water

Method of removing bitumen from tar sand for subsequent recovery

Method of removing bitumen from tar sand utilizing ultrasonic en

Method of separating bitumen from tar sand with cold solvent

Method of separating bitumin from bituminous sands and preparing

Method of sludge disposal related to the hot water extraction of

Method of solvent extraction of coal by a heavy oil

Method of treating shales

Modified staged turbulent bed process for retorting carbon conta

Molten salt hydroconversion process

Multi-phase separation methods and apparatus

Multiple stage desalting and dedusting process

Non-aqueous hydrogenation of solid carbonaceous material

Non-carcinogenic light lubricants and a process for producing sa