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Frankfurt-am-Main, Germany

Davy International Aktiengesellschaft

USPTO Granted Patents = 17

Forward Citations = 223

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25 inventors (with patents filed for the assignee):

Ghazi R Al-Muddarris (4 out of 5 patents)

Gerhard Keunecke (3 out of 6 patents)

Lothar Sterck (3 out of 3 patents)

4. Rainer Lell (3 out of 4 patents)

5. Reinhard Pachaly (2 out of 4 patents)

6. Adolf Stauffer (2 out of 5 patents)

7. Ovidiu Dicoi (2 out of 3 patents)

8. Anton Klopfer (2 out of 2 patents)

9. Walter Knobel (2 out of 2 patents)

10. Lars Hellmer (1 out of 4 patents)

11. Wilhelm Flesch (1 out of 2 patents)

12. John H Maude (1 out of 1 patent)

13. Alfred Vilshofer (1 out of 1 patent)

14. Jamil Anwer (1 out of 1 patent)

15. Karl Wintrup (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 4361538 - Continuous moving bed reactor for manufacture of high molecular weight (1982-11-30),

2. 4349354 - Furnace for gasifying granular fuels (1982-09-14),

3. 4329516 - Process for the production of methyl t-butyl ether (1982-05-11),

4. 4315904 - Process for removing hydrogen sulphide and sulphur dioxide from claus (1982-02-16),

5. 4314891 - Process for reconcentrating moist glycol (1982-02-09),

6. 4309402 - Process and apparatus for production of elemental sulfur (1982-01-05),

7. 4305919 - Process and plant equipment for the short-term propulsion of one or (1981-12-15),

8. 4302434 - Process for producing hydrogen and sulphur from hydrogen sulphide (1981-11-24),

9. 4296088 - Heat exchange techniques for the catalytic oxidation of gaseous sulfur (1981-10-20),

10. 4285871 - Process for continuously separating phthalic anhydride from the reaction (1981-08-25),

11. 4285870 - Process for continuously separating phthalic anhydride from the reaction (1981-08-25),

12. 4273620 - Process for reconcentrating moist glycol (1981-06-16),

13. 4263211 - Process for the recovery of maleic anhydride from gases containing (1981-04-21),

14. 4254246 - Column system process for polyester plants (1981-03-03),

15. 4249921 - Sulphur condensing apparatus (1981-02-10),

Davy International Aktiengesellschaft is a leading global provider of innovative engineering solutions for the chemical, petrochemical and pharmaceutical industries. With over 50 years of experience, we specialize in process design, plant engineering, and project management services. Our commitment to quality and safety ensures successful and sustainable projects for our clients worldwide.

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USPTO Data Jan 1 1976 - Dec 9 2025

17 Patents

#42 in Frankfurt-am-Main

#2,499 in Germany

#34,819 in the World

Frankfurt-am-Main, Germany

Davy International Aktiengesellschaft

Forward Citations = 223

25 inventors:

Ghazi R Al-Muddarris (4 out of 5 patents)

Gerhard Keunecke (3 out of 6 patents)

Lothar Sterck (3 out of 3 patents)

4. Rainer Lell (3 out of 4 patents)

5. Reinhard Pachaly (2 out of 4 patents)

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