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Bochum, Germany

Dr. C. Otto & Comp. G.m.b.h.

USPTO Granted Patents = 106

Forward Citations = 1,233

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70 inventors (with patents filed for the assignee):

Wilhelm Danguillier (17 out of 17 patents)

Egon Haese (15 out of 15 patents)

Wolfgang Grams (15 out of 16 patents)

4. Paul Gernhardt (14 out of 14 patents)

5. Siegfried Pohl (13 out of 13 patents)

6. Erich E Pries (13 out of 13 patents)

7. Heinz Thubeauville (10 out of 10 patents)

8. Hans-Jurgen Kwasnik (10 out of 12 patents)

9. Hans-Gunter Piduch (9 out of 12 patents)

10. Folkard Wackerbarth (8 out of 8 patents)

11. Carl-Heinz Struck (8 out of 8 patents)

12. Ralf Schumacher (6 out of 11 patents)

13. Hansjurgen Ullrich (5 out of 6 patents)

14. Horst Ritter (4 out of 5 patents)

15. Karl Peter (3 out of 3 patents)

Core Competencies:

Coke Oven Technology

Gas Treatment

Hydrogen Sulfide Removal

Coke Production

Thermal Management

Gas Flow Optimization

Coke Oven Battery

Sintered Ceramic Materials

Combustion Chamber

Sealing Surface Cleaning

Biological Sewage Purification

Ignition Systems

106 patents: Sort by Forward Citations

1. 4666559 - Closure for a gas offtake pipe (1987-05-19),

2. 4664140 - Reversing valve (1987-05-12),

3. 4655488 - System for latching a leveling door (1987-04-07),

4. 4580908 - Thermometer for coke oven chamber walls (1986-04-08),

5. 4564421 - Ascension pipe for coke ovens (1986-01-14),

6. 4564420 - Coke oven battery (1986-01-14),

7. 4564419 - Nozzle plate construction for underjet coke ovens (1986-01-14),

8. 4563432 - Production of porous sintered ceramic material (1986-01-07),

9. 4561843 - Transfer flue with means for improving the flow of gases (1985-12-31),

10. 4552622 - Cleaning apparatus for the sealing surfaces of leveling doors and (1985-11-12),

11. 4518572 - Method of washing hydrogen sulfide from coke oven gas by the ammonium (1985-05-21),

12. 4499060 - Process for removing hydrogen sulfide from gases, particularly coal (1985-02-12),

13. 4497691 - Stack cooler for dry quenching of coke (1985-02-05),

14. 4491505 - Apparatus for leveling coal in a coke oven chamber (1985-01-01),

15. 4440599 - Heating system for a coke oven battery having twin-heating flues (1984-04-03),

Dr. C. Otto & Comp. G.m.b.H. is a leading German medical company specializing in innovative pharmaceutical and healthcare products. With a strong focus on research and development, we strive to provide high-quality, safe, and effective solutions for patients worldwide. Our extensive product portfolio includes prescription medications, over-the-counter drugs, medical devices, and nutritional supplements. Committed to improving the well-being of individuals, we collaborate with healthcare professionals and institutions to deliver advanced therapeutic options. Visit our website to learn more about our products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

106 Patents

#1 in Bochum

#590 in DT

#7,173 in the World

Bochum, Germany

Dr. C. Otto & Comp. G.m.b.h.

Forward Citations = 1,233

70 inventors:

Wilhelm Danguillier (17 out of 17 patents)

Egon Haese (15 out of 15 patents)

Wolfgang Grams (15 out of 16 patents)

4. Paul Gernhardt (14 out of 14 patents)

5. Siegfried Pohl (13 out of 13 patents)

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