1
David S Hoover, Edwin N Givens: Process for coal liquefaction employing selective coal feed. International Coal Refining Company, Mark F Wachter, August 9, 1983: US04397732 (224 worldwide citation)

An improved coal liquefaction process is provided whereby coal conversion is improved and yields of pentane soluble liquefaction products are increased. In this process, selected feed coal is pulverized and slurried with a process derived solvent, passed through a preheater and one or more dissolver ...


2
Juergen Brendel: Atomic session-start operation combining clear-text and encrypted sessions to provide id visibility to middleware such as load-balancers. Dickens Coal, Townsend and Townsend and Crew, August 3, 2004: US06772333 (146 worldwide citation)

A load-balancer assigns incoming requests to servers at a server farm. An atomic operation assigns both un-encrypted clear-text requests and encrypted requests from a client to the same server at the server farm. An encrypted session is started early by the atomic operation, before encryption is req ...


3
Robert W Graybill: Pulverized coal burner for furnace and operating method. Coal Tech, C Hercus Just, April 3, 1979: US04147116 (75 worldwide citation)

A pulverized coal burner for a furnace adapted to be used in conjunction with a pulverizer which reduces coal to approximately 40 microns size in the presence of inert steam which conveys it under pressure to said burner tangentially to spiral the same within a fuel tube around a coaxial central tub ...


4
Derek Farnham Williams, Terence Geoffrey Martin: Extraction of oil shales and tar sands. Coal, Stevens Davis Miller & Mosher, August 22, 1978: US04108760 (72 worldwide citation)

This invention relates to the extraction of oil shales and tar sands by using a solvent under supercritical conditions at a temperature within 200.degree. C. or its critical temperature in order to effect extraction of kerogen from the sand or shale.


5
Martin David James Reginald: Radiating line transmission system. Coal, Wray James C, July 22, 1975: US3896380 (69 worldwide citation)

A radiating transmission line system employs a pair of leaky coaxial cables which are spaced from each other and extend along a tunnel to propagate radio signals. The signals to be propagated are fed to both cables in such a manner that the signals in one cable are in antiphase to the signals in the ...


6
Ahmed A El Saie: Method and apparatus for drilling and separating. Consolidation Coal Company, Alan N McCartney, June 6, 1989: US04836611 (53 worldwide citation)

A combination borehole drilling apparatus and a separator for receiving a three phase gas, liquid and solid mixture, from the borehole, and venting the gas, separating the liquid from the solid, collecting and discharging the solid and recycling the liquid to the borehole drilling apparatus.


7
Amzi Gossard: Process for degasification of subterranean mineral deposits. Kerr McGee Coal Corporation, William G Addison, November 10, 1981: US04299295 (52 worldwide citation)

A process for drilling spaced horizontal boreholes in a coal or other mineral deposit in excess of 1500 feet in length in a pattern determined to maximize gas removal. Directional guidance is provided by a continuous downhole survey tool connected to data display devices by an internal drill rod cab ...


8
Yat S Chan, Anthony D S Tantram, Bryan S Hobbs, John R Finbow: Gas sensor. Coal, Stevens Davis Miller & Mosher, September 27, 1983: US04406770 (52 worldwide citation)

A gas sensor cell assembly has planar electrodes separated by a planar hydrophilic wick which extends through the electrode into an electrolyte expansion chamber where it contacts an electrolyte. The cell is extremely compact and operates in all orientations.


9
Carlisle Thweatt Jr: Electric water heater. Sherwood Templeton Coal Company, Price Heneveld Cooper DeWitt & Litton, June 27, 2000: US06080973 (48 worldwide citation)

An electric water heater is provided which includes a polymeric body having an elongated hollow and an inlet opening and an outlet opening in communication with the hollow for flowing water to pass therethrough. An electrical resistance heater having a heating element of a material exhibiting a posi ...


10
Alan Meadows: Drill pipe sections. Coal, James C Wray, January 29, 1985: US04496203 (46 worldwide citation)

A drill pipe section enables electrical information signals to be transmitted along a borehole to feed information generated by instruments situated adjacent to the drilling bit along the drill string to monitoring and/indication equipment situated adjacent to the drilling machine. The section compr ...



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