1
David S Mitchell, Robert H Nagel: Multiple channel CATV system utilizing row grabber interface as CATV input. IDR, Hubbell Cohen Stiefel & Gross, October 10, 1978: US04120003 (98 worldwide citation)

An improved multichannel CATV type television system includes a real time frame grabbing system for substantially instantaneously providing a selectable continuous video displayable frame of video information to a video interface, such as a row grabbing terminal, for providing a preselected continuo ...


2
David S Mitchell, David R Sageman: Countercurrent plug-like flow of two solids. Chevron Research Company, D A Newell, R H Davies, R H Evans, June 5, 1979: US04157245 (68 worldwide citation)

A process is disclosed for contacting at least two solids and a fluid, particularly for retorting and/or gasification of solid carbonaceous materials such as coal, coke, shale or tar sands by introducing a solid heat-transfer material into an upper portion of a treatment or contacting zone and a sol ...


3
David S Mitchell: Solvent extraction process. Chevron Research Company, D A Newell, R H Davies, W D Reese, February 19, 1980: US04189376 (39 worldwide citation)

A method is disclosed for solvent-extracting an extractable component from a mixture including the extractable component and subdivided solids, comprising: (a) maintaining a vertically extending bed comprising the solids in an extraction zone and introducing the mixture into an upper portion of the ...


4
David S Mitchell: Solvent extraction method. Chevron Research Company, D A Newell, S R LaPaglia, J W Ambrosius, June 21, 1983: US04389300 (36 worldwide citation)

A method for solvent extracting extractable materials from solids is disclosed, which includes (a) maintaining a vertically extending bed comprising said solids in a vertically extending extraction zone and introducing said mixture into an upper portion of said bed; (b) providing a substantially con ...


5
David S Mitchell: Process for removing metalliferous contaminants from hydrocarbons. Chevron Research Company, G F Magdeburger, R H Davies, D L Hagmann, March 30, 1976: US03947347 (32 worldwide citation)

A process for removing metalliferous contaminants from a hydrocarbon feedstock is disclosed, comprising contacting the feedstock in the presence of hydrogen with a solid, said solid consisting essentially of an inert particulate solid having an average pore size in the range of from 1,000 to 10,000 ...


6
David S Mitchell: Apparatus and method for feeding pulverized hydrocarbonaceous solids into a high pressure reactor. Chevron Research Company, Burns Doane Swecker & Mathis, May 29, 1984: US04451184 (31 worldwide citation)

The instant disclosure relates to the feeding of pulverized hydrocarbonaceous solids, such as coal, coke, tar sands, oil shale, etc., into a high pressure reactor for retorting or gasification of the solids. The pulverized hydrocarbonaceous solids are mixed with a motive fluid and pressurized in a j ...


7
David S Mitchell: Solvent extraction method. Chevron Research Company, D A Newell, S R LaPaglia, J W Ambrosius, August 30, 1983: US04401551 (29 worldwide citation)

A method for extracting bitumen from bituminous sand is disclosed, in which the bituminous sand is contacted with previously recovered bitumen at a temperature sufficient to maintain the previously recovered bitumen as a liquid, and the resulting liquids are separated from the resulting solids.


8
David Sageman, David S Mitchell: Gasification process for carbonaceous materials. Chevron Research Company, D A Newell, S R LaPaglia, E A Schaal, April 17, 1984: US04443229 (27 worldwide citation)

A coal gasification process is disclosed wherein two portions of heat transfer material are introduced into the reaction vessel at different locations and different temperatures. Steam is passed upwardly through the vessel to react with the carbonaceous material to form a hot char and a gaseous prod ...


9
David S Mitchell: Solvent extraction method. Chevron Research Company, D A Newell, W D Reese, Q T Dickinson, November 6, 1984: US04481099 (15 worldwide citation)

A method is disclosed for solvent-extracting an extractable component from a mixture including the extractable component and subdivided solids, comprising:


10
David S Mitchell, David R Sageman: Indirect heat retorting process with cocurrent and countercurrent flow of hydrocarbon-containing solids. Chevron Research Company, D A Newell, R H Davies, R H Evans, January 15, 1980: US04183800 (9 worldwide citation)

A continuous process is disclosed for the retorting of oil shale or other similar hydrocarbon containing solids. Heat carrier particles at an elevated temperature are introduced into an upper portion of a retort and pass downwardly therethrough, fluidized by an upwardly flowing non-oxidizing gas int ...