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Charbonnages De France

USPTO Granted Patents = 64

CIPO Patents = 1

Forward Citations = 536

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62 inventors (with patents filed for the assignee):

Roger M Puff (10 out of 10 patents)

Alfred A Valantin (5 out of 8 patents)

Pierre Grandfils (5 out of 5 patents)

4. Jean-Claude Kita (5 out of 5 patents)

5. Raymond Chauvin (4 out of 4 patents)

6. Serge L Delessard (4 out of 4 patents)

7. Guy Blanpain (4 out of 4 patents)

8. Gerard Flament (3 out of 3 patents)

9. Maurice Boutonnat (3 out of 4 patents)

10. Gerard Rose (3 out of 4 patents)

11. Jacques P Dreuilhe (3 out of 3 patents)

12. Jean C Kita (3 out of 3 patents)

13. Jean J Demoulin (3 out of 3 patents)

14. Guy Marlair (3 out of 3 patents)

15. Marc S Noel (2 out of 2 patents)

Core Competencies:

Fluidized Bed Technology

Combustible Gas Detection

Video Signal Transmission

Heat Exchanger Apparatus

Dust Collection Systems

Coal Treatment Processes

Rotary Cutting Devices

Air Purification Methods

Fluidization Control

Explosive Material Handling

Soundproofing Solutions

Turbulent-Flow Burners

64 patents: Sort by Forward Citations

1. 5335006 - Method and device for transmitting video signals in confined spaces (1994-08-02),

2. 5234837 - Pseudo-continuous process for interrogating a combustible gas detector (1993-08-10),

3. 5143697 - Device for extracting particulate materials of a fluidized bed from the (1992-09-01),

4. 5009852 - Cooled fluidization grid (1991-04-23),

5. 4980681 - Direct view remote control method for workings machine and transmitter (1990-12-25),

6. 4919611 - Fluid fuel combustion process and turbulent-flow burner for implementing (1990-04-24),

7. 4904115 - Method and device for controlling the trajectory of a shield-type (1990-02-27),

8. 4880311 - Apparatus for supplying unclogging gas to fluidized bed apparatus (1989-11-14),

9. 4873270 - Polyurethane-carbohydrate-based substances which can be calendered to (1989-10-10),

10. 4862157 - Signal transfer method and equipment for electric machine equipped with (1989-08-29),

11. 4838185 - Fluid fuel combustion process and turbulent-flow burner for implementing (1989-06-13),

12. 4796691 - Fluidized bed heat exchange apparatus (1989-01-10),

13. 4746492 - Apparatus for the control of heat energy exchanged with a fluidized bed (1988-05-24),

14. 4737171 - Portable individual dust collector (1988-04-12),

15. 4736711 - Fluidized-bed heat generator with improved means for ash removal and (1988-04-12),

Charbonnages de France is a French state-owned company dedicated to the extraction and sale of coal. Established in 1946, the company managed coal mines across France, becoming one of the largest coal producers in Europe. Charbonnages de France played a significant role in the country's industrial development. Today, the company focuses on the rehabilitation and redevelopment of former mining sites and supporting sustainable energy initiatives.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

64 Patents

#91 in Paris

#378 in France

#11,009 in the World

Charbonnages De France

Forward Citations = 536

62 inventors:

Roger M Puff (10 out of 10 patents)

Alfred A Valantin (5 out of 8 patents)

Pierre Grandfils (5 out of 5 patents)

4. Jean-Claude Kita (5 out of 5 patents)

5. Raymond Chauvin (4 out of 4 patents)

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