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Passavant-werke Ag

USPTO Granted Patents = 16

Forward Citations = 92

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18 inventors (with patents filed for the assignee):

Jurgen Fresenius (5 out of 5 patents)

Hubert Coenen (3 out of 18 patents)

Michael Zumbragel (3 out of 3 patents)

4. Oswald Busse (2 out of 16 patents)

5. Helmut Hubert (2 out of 2 patents)

6. Walti Schmitt (1 out of 1 patent)

7. Ante Skocic (1 out of 1 patent)

8. Ulrich Paul (1 out of 1 patent)

9. Willi Schaper (1 out of 1 patent)

10. Karl Seel (1 out of 1 patent)

11. Carl-Adolf Eschenbach (1 out of 1 patent)

12. Friedhelm Bultmann (1 out of 1 patent)

13. Matthias Brunner (1 out of 1 patent)

14. Stephan Geyer (1 out of 1 patent)

15. Volker Bach (1 out of 1 patent)

16 patents: Sort by Forward Citations

1. 5695646 - Process for conditioning soft water to become drinking water (1997-12-09),

2. 5500118 - Biogas reactor for the anaerobic treatment of waste water (1996-03-19),

3. 5462663 - Suspension and guidance mechanism for the filter plates of a filter press (1995-10-31),

4. 5431808 - Device for odor filtering of exhaust air from waste water treatment (1995-07-11),

5. 5366622 - Procedure and installation for conditioning and subsequent dewatering of (1994-11-22),

6. 5338445 - Module for a reactor for anaerobic waste water treatment (1994-08-16),

7. 5330660 - Method for evacuating floating sludge from settling tanks and thickener (1994-07-19),

8. 5296142 - Chamber filter press (1994-03-22),

9. 5194148 - Hydraulic cylinder extension device for a filter press (1993-03-16),

10. 5190672 - Method for thermal disposal of sewage sludge (1993-03-02),

11. 5160612 - Lifting support frame for a filter press (1992-11-03),

12. 5154830 - Process of removing phosphorus and suspended matter from waste water (1992-10-13),

13. 5075012 - Process for dewatering sludges in filter presses (1991-12-24),

14. 5045191 - Non-clogging filtrate outlet stopper for use in a plate filter press (1991-09-03),

15. 5037559 - Process for conditioning and dewatering sludges (1991-08-06),

Passavant-werke Ag is a leading provider of water and wastewater treatment solutions. With over 150 years of experience, the company offers a wide range of products and services, including screening, filtration, and sludge treatment systems. Passavant-werke Ag is committed to sustainability and innovation, helping customers around the world meet their environmental challenges.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

16 Patents

#77 in

#2,627 in Germany

#36,634 in the World

Passavant-werke Ag

Forward Citations = 92

18 inventors:

Jurgen Fresenius (5 out of 5 patents)

Hubert Coenen (3 out of 18 patents)

Michael Zumbragel (3 out of 3 patents)

4. Oswald Busse (2 out of 16 patents)

5. Helmut Hubert (2 out of 2 patents)

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