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Ruhrgas Aktiengesellschaft

USPTO Granted Patents = 41

Forward Citations = 358

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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)

Core Competencies:

Gas Burner

Combustion Device

Heat Treatment

Gas Measurement

Furnace Roller Cleaning

Fuel Gas Mixture

Air Supply Control

Synthesis Gas Production

Gas-Fired Appliance

Heat Pump System

Nitrogen Oxides Conversion

Industrial Furnace

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),

Company Overview

Ruhrgas Aktiengesellschaft, headquartered in Essen, Germany, specializes in advanced gas technologies and solutions. The company focuses on developing and manufacturing systems related to gas drying technology, fuel combustion devices, and gas-fired appliance control. Their expertise extends to furnace roller cleaning, flame retention burners, and gas measurement apparatus, catering to industrial applications such as reheating and controlled atmosphere furnaces. Ruhrgas is committed to innovation in the gas sector, enhancing efficiency and safety in energy utilization.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

41 Patents

#21 in

#1,246 in Germany

#16,686 in the World

Ruhrgas Aktiengesellschaft

Forward Citations = 358

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Ruhrgas Aktiengesellschaft. Retrieved from https://idiyas.com/company/ruhrgas-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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