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Ruhrkohle Ag

USPTO Granted Patents = 69

Forward Citations = 780

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109 inventors (with patents filed for the assignee):

Eckard Wolowski (7 out of 9 patents)

Josef Langhoff (6 out of 7 patents)

Wilhelm Stewen (5 out of 7 patents)

4. Wolfgang Becker (5 out of 5 patents)

5. Jurgen Seipenbusch (4 out of 4 patents)

6. Frank Mirtsch (4 out of 4 patents)

7. Hans Oldengott (3 out of 4 patents)

8. Klaus Wessiepe (3 out of 6 patents)

9. Gerd Nashan (3 out of 12 patents)

10. Heinz Tewes (3 out of 3 patents)

11. Dieter Breidenbach (2 out of 2 patents)

12. Burckard Vitt (2 out of 2 patents)

13. Alfons Jankowski (2 out of 4 patents)

14. Klaus-Dieter Dohms (2 out of 2 patents)

15. Siegfried Ormanns (2 out of 3 patents)

Core Competencies:

Hydrogenation

Coal Gasification

Coke Production

Fluidized Bed

Coal Liquefaction

Telemetry Method

Underground Mining

Coke Oven Doors

Industrial Plant

Waste Water Utilization

Excavating Machine

Pneumatic Valve Control

69 patents: Sort by Forward Citations

1. 5810134 - Underground energy-supply train (1998-09-22),

2. 5740920 - Jigging screen device with pneumatic valve control (1998-04-21),

3. 5598149 - Commercial-size, automatic industrial plant having several parts (1997-01-28),

4. 5560437 - Telemetry method for cable-drilled boreholes and method for carrying it (1996-10-01),

5. 5421963 - Coke-feeding device with housing for a dry cooling installation for coke (1995-06-06),

6. 5279713 - Door (1994-01-18),

7. 5155966 - Roof structure (1992-10-20),

8. 5150543 - Door (1992-09-29),

9. 5107180 - System for operating a portable lamp (1992-04-21),

10. 5100536 - Method of processing substances (1992-03-31),

11. 5045179 - Process for the hydrogenation reprocessing of used oils (1991-09-03),

12. 5039379 - Dry cooling of coke (1991-08-13),

13. 5015457 - Process for the hydrogenation of organochlorine compounds, (1991-05-14),

14. 4992657 - Apparatus for detecting the cutting horizon for mining machines (1991-02-12),

15. 4986032 - Door (1991-01-22),

Company Overview

Ruhrkohle AG, headquartered in Essen, Germany, specializes in coal processing technology, focusing on innovative methods for hydrogenation, coal gasification, and coke production. The company is recognized for its advancements in fluidized bed technology and coal liquefaction, contributing to efficient energy production and resource management. Additionally, Ruhrkohle AG is involved in telemetry methods and underground mining, enhancing operational safety and efficiency in the coal industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

69 Patents

#14 in Essen

#836 in Germany

#10,763 in the World

Ruhrkohle Ag

Forward Citations = 780

109 inventors:

Eckard Wolowski (7 out of 9 patents)

Josef Langhoff (6 out of 7 patents)

Wilhelm Stewen (5 out of 7 patents)

4. Wolfgang Becker (5 out of 5 patents)

5. Jurgen Seipenbusch (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ruhrkohle Ag. Retrieved from https://idiyas.com/company/ruhrkohle-ag

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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