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 (225 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 ...

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 (205 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 ...

Martin David James Reginald: Radiating line transmission system. Coal, Wray James C, July 22, 1975: US3896380 (157 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 ...

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 ...

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.

John D Sampson, David J W Sparrow: Mixing equipment. Coal, James Creighton Wray, October 11, 1983: US04408886 (58 worldwide citation)

Powdered or particulate material, especially cement which is prone to caking, is stored in a fluidized storage container (1) and is conveyed in predetermined amount by conveyor means (15) to a mixer unit (20). The material is mixed with water which is also supplied to the mixer unit to form a grout ...

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.

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 ...

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.

Dennis C Kowalczyk, Bruce A Bricklemyer, Joseph J Svoboda: Process for removing polymer-forming impurities from naphtha fraction. The Pittsburg & Midway Coal Mining Co, Deane E Keith, Forrest D Stine, December 27, 1983: US04422927 (51 worldwide citation)

Polymer precursor materials are vaporized without polymerization or are removed from a raw naphtha fraction by passing the raw naphtha to a vaporization zone (24) and vaporizing the naphtha in the presence of a wash oil while stripping with hot hydrogen to prevent polymer deposits in the equipment.