Charbonnages de France

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
A01N PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF 194

Top Patents (by citation)

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5308827 Herbicidal foam compositionFeb 24, 93May 03, 94[A01N]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5143697 Device for extracting particulate materials of a fluidized bed from the fluidization enclosureExpiredMay 16, 90Sep 01, 92[B01J]
5009852 Cooled fluidization gridExpiredDec 08, 88Apr 23, 91[B01J]
4980681 Direct view remote control method for workings machine and transmitter and receiver assembly for carrying out such methodExpiredSep 29, 86Dec 25, 90[G08C, E21C]
4968492 Device for feeding fluidizing gas to the openings in a grid for supporting a bed of particles to be fluidizedExpiredAug 16, 89Nov 06, 90[F27B]
4919611 Fluid fuel combustion process and turbulent-flow burner for implementing sameExpiredApr 17, 89Apr 24, 90[F23D]
4904115 Method and device for controlling the trajectory of a shield-type tunnelling machineExpiredApr 18, 88Feb 27, 90[E21D]
4880311 Apparatus for supplying unclogging gas to fluidized bed apparatusExpiredOct 21, 86Nov 14, 89[B01F]
4862157 Signal transfer method and equipment for electric machine equipped with three-phase power supply cableExpiredJan 20, 88Aug 29, 89[H04Q]
4838185 Fluid fuel combustion process and turbulent-flow burner for implementing sameExpiredSep 08, 87Jun 13, 89[F23K, F23D]
4796691 Fluidized bed heat exchange apparatusExpiredJul 13, 87Jan 10, 89[F28D]
4746492 Apparatus for the control of heat energy exchanged with a fluidized bedExpiredJul 31, 86May 24, 88[F27B]
4736711 Fluidized-bed heat generator with improved means for ash removal and heat recoveryExpiredDec 10, 86Apr 12, 88[F23C]
4737171 Portable individual dust collectorExpiredAug 01, 86Apr 12, 88[B01D]
4712153 Power circuit and trigger device comprising sameExpiredSep 03, 85Dec 08, 87[H02H]
4699060 Detonation arrestor device for bulk explosive materials transferExpiredJun 18, 86Oct 13, 87[F42D]
4682423 Centrifugal drier drum for wet granular materialExpiredApr 23, 86Jul 28, 87[F26B]
4674564 Fluidizing apparatus with built-in heat exchangerExpiredApr 17, 86Jun 23, 87[F28C]
4669921 Device for supplying a powdery product in gravimetrically metered amounts to a pneumatic lineExpiredJun 17, 85Jun 02, 87[B65G]
4668018 Rotary cutter with spray nozzles for removal of ores from mine facesExpiredApr 12, 85May 26, 87[E21F, E21C]
4660892 Sectorial sprinkling device for coal miningExpiredNov 20, 85Apr 28, 87[E21F, E21C]

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