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For the Inventor, By the Inventor

DE

Passavant-Werke Ag


USPTO Granted Patents = 16

Forward Citations = 92

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18 inventors (with patents filed for the assignee):

goldMedal Jurgen Fresenius (5 out of 5 patents)

silverMedal Hubert Coenen (3 out of 18 patents)

bronzeMedal 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:

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),
Company Overview
Passavant-Werke AG is a prominent German company specializing in innovative solutions for water and wastewater treatment, as well as environmental technology. The organization focuses on developing advanced systems and processes that enhance the efficiency and sustainability of water management. With a strong commitment to research and development, Passavant-Werke AG plays a vital role in addressing global environmental challenges, providing tailored solutions that meet the needs of various industries and municipalities.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

16 Patents

#43 in

#2,625 in Germany

#37,831 in the World

DE
DE

Passavant-Werke Ag

Forward Citations = 92

18 inventors:

goldMedal Jurgen Fresenius (5 out of 5 patents)

silverMedal Hubert Coenen (3 out of 18 patents)

bronzeMedal Michael Zumbragel (3 out of 3 patents)

4.  Oswald Busse (2 out of 16 patents)

5.  Helmut Hubert (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Passavant-Werke Ag. Retrieved from https://idiyas.com/company/passavant-werke-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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