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For the Inventor, By the Inventor

Essen, Germany

Didier Engineering Gmbh

USPTO Granted Patents = 106

Forward Citations = 901

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93 inventors (with patents filed for the assignee):

goldMedal Claus Flockenhaus (36 out of 38 patents)

silverMedal Dietrich Wagener (24 out of 25 patents)

bronzeMedal Joachim F Meckel (18 out of 20 patents)

4.  Manfred Galow (17 out of 20 patents)

5.  Erich Hackler (17 out of 17 patents)

6.  Hartmut Kainer (12 out of 23 patents)

7.  Daniel Grimm (11 out of 32 patents)

8.  Manfred Blase (10 out of 13 patents)

9.  Karl H Laue (9 out of 10 patents)

10.  Horst Fach (7 out of 8 patents)

11.  Horst G Joseph (7 out of 7 patents)

12.  Theo Sander (7 out of 7 patents)

13.  Klaus Merkel (6 out of 6 patents)

14.  Wolfgang Rohde (6 out of 20 patents)

15.  Blagoje Levkov (6 out of 9 patents)


Core Competencies:
Nitrogen Oxide Reduction
Coke Production
Catalytic Elements
Exhaust Gas Cleaning
Furnace Design
Coal Tar Pitch
Coke Oven Technology
Gas Treatment
Heat Recovery
Catalyst Manufacturing
Gas Quenching
Thermal Treatment

106 patents:

1. 5128021 - Pitch from coal tar pitch, method of its production, as well as (1992-07-07),
2. 4950473 - Method for reducing nitrogen oxides in flue gas (1990-08-21),
3. 4935392 - Process for the manufacture of catalyst members for the reduction of (1990-06-19),
4. 4914073 - Process for the manufacture of catalytic elements and catalytic elements (1990-04-03),
5. 4895821 - Process for the manufacture of catalytic elements and catalytic elements (1990-01-23),
6. 4828806 - Process for cleaning an exhaust gas (1989-05-09),
7. 4771026 - Catalyst in the form of a plate for nitrogen oxide reduction in exhaust (1988-09-13),
8. 4751212 - Process for the manufacture of a catalyst for the reduction of nitrogen (1988-06-14),
9. 4746483 - Process for the manufacture of catalyst molding (1988-05-24),
10. 4734165 - Method for the production of coke (1988-03-29),
11. 4721699 - Catalyst for the separation of nitrogen oxides from combustion exhaust (1988-01-26),
12. 4720376 - Process for the removal of nitrogen oxides and soot from exhaust gases (1988-01-19),
13. 4695559 - Catalyst for the selective reduction of nitrogen oxides in waste gases (1987-09-22),
14. 4672052 - Catalyst for removal of nitrogen oxides from exhaust gases (1987-06-09),
15. 4629418 - Process and furnace for reheating metallic objects (1986-12-16),
Company Overview
Didier Engineering GmbH, based in Essen, Germany, specializes in advanced coal processing technology. The company focuses on innovative solutions for nitrogen oxide reduction, coke production, and exhaust gas cleaning. Its expertise extends to catalytic elements, furnace design, and gas treatment, positioning Didier Engineering as a key player in enhancing efficiency and sustainability within the coal industry. The firm is dedicated to developing technologies that improve environmental performance while optimizing production processes in coal tar pitch and coke oven technology.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

106 Patents

#11 in Essen

#559 in Germany

#7,411 in the World

Essen, DE
Essen, Germany

Didier Engineering Gmbh

Forward Citations = 901

93 inventors:

goldMedal Claus Flockenhaus (36 out of 38 patents)

silverMedal Dietrich Wagener (24 out of 25 patents)

bronzeMedal Joachim F Meckel (18 out of 20 patents)

4.  Manfred Galow (17 out of 20 patents)

5.  Erich Hackler (17 out of 17 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Didier Engineering Gmbh. Retrieved from https://idiyas.com/company/didier-engineering

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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