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Ruhrgas Aktiengesellschaft

USPTO Granted Patents = 41

Forward Citations = 351

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53 inventors (with patents filed for the assignee):

Hans Sommers (10 out of 10 patents)

Detlef Altemark (7 out of 7 patents)

Theo Jannemann (5 out of 5 patents)

4. Manfred Weid (5 out of 5 patents)

5. Friedhelm Kuhn (4 out of 6 patents)

6. Wilhelm Korsmeier (3 out of 3 patents)

7. Carl Hafke (3 out of 14 patents)

8. Heinz Bathke (3 out of 3 patents)

9. Hans Berg (2 out of 2 patents)

10. Robert Hess (2 out of 2 patents)

11. Wilhelm Schuster (2 out of 19 patents)

12. Helmut Heuss (2 out of 6 patents)

13. Jurgen Wittekind (2 out of 10 patents)

14. Sahibzada S Laiquddin (2 out of 2 patents)

15. Dieter Wolf (2 out of 2 patents)

41 patents: Sort by Forward Citations

1. 6425942 - Method and device for drying a gas (2002-07-30),

2. 6193502 - Fuel combustion device and method (2001-02-27),

3. 5913326 - Automatic closing device for a shut-off device (1999-06-22),

4. 5333591 - Device to control a gas-fired appliance (1994-08-02),

5. 5188527 - Method of and system for cleaning the surface of furnace rollers of a (1993-02-23),

6. 5055032 - A burner with a flame retention device (1991-10-08),

7. 4960378 - Gas burner (1990-10-02),

8. 4941345 - Method and apparatus for the measurement of gas properties (1990-07-17),

9. 4886450 - Cooled tubular assembly for industrial reheating furnace (1989-12-12),

10. 4859171 - Method and apparatus of operating pre-mixed burners (1989-08-22),

11. 4802142 - Device for controlling the flow rate of a fuel gas/air mixture and/or (1989-01-31),

12. 4749002 - Shut-off device in the form of a ball valve (1988-06-07),

13. 4738577 - Furnace for the heat treatment of work pieces (1988-04-19),

14. 4723873 - Method and device for preparing an existing buried conduit for (1988-02-09),

15. 4699122 - Storage water heater system (1987-10-13),

Ruhrgas Aktiengesellschaft is a German energy company that specializes in the exploration, production, and distribution of natural gas. Established in 1926, Ruhrgas has grown to become one of the leading natural gas providers in Europe. The company focuses on delivering reliable energy solutions and innovative technologies to its customers. With a strong commitment to sustainability, Ruhrgas aims to contribute to a cleaner and more sustainable energy future.

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

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USPTO Data Jan 1 1976 - Dec 9 2025

41 Patents

#20 in

#1,267 in Germany

#16,191 in the World

Ruhrgas Aktiengesellschaft

Forward Citations = 351

53 inventors:

Hans Sommers (10 out of 10 patents)

Detlef Altemark (7 out of 7 patents)

Theo Jannemann (5 out of 5 patents)

4. Manfred Weid (5 out of 5 patents)

5. Friedhelm Kuhn (4 out of 6 patents)

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