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For the Inventor, By the Inventor

Graz, Austria

Andritz Ag


USPTO Granted Patents = 99

% Expired Patents = 37.4



Trademarks = 10

Forward Citations = 188

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127 inventors (with patents filed for the assignee):

goldMedal Helmuth Gabl (19 out of 20 patents)

silverMedal Wilhelm Mausser (11 out of 22 patents)

bronzeMedal Gerald Schadler (9 out of 9 patents)

4.  Klaus Gissing (6 out of 6 patents)

5.  Harald Weigant (6 out of 9 patents)

6.  Andreas Anzel (5 out of 6 patents)

7.  Alexander Gscheider (5 out of 8 patents)

8.  Axel Pichler (5 out of 5 patents)

9.  Bernhard Scherzinger (5 out of 5 patents)

10.  Franz Petschauer (4 out of 15 patents)

11.  Walter Writzl (4 out of 8 patents)

12.  Erwin Hertl (3 out of 3 patents)

13.  Michael Kramer (3 out of 3 patents)

14.  Rudolf Stadlauer (3 out of 4 patents)

15.  Peter Scheucher (3 out of 19 patents)


Core Competencies:
Flocculant Regulation
Filtrate Measurement
Screw Press
Fibrous Web Production
Yankee Dryer
Dewatering Techniques
Hydrocyclone
Energy Savings
Metal Recovery
Suspension Aeration
Paper Web Stabilization
Waste Heat Utilization

99 patents:

1. 12590023 - Method for regulating the addition of a flocculant to a sludge (2026-03-31),
2. 12365159 - Method and device for measuring the filtrate content on a screw press (2025-07-22),
3. 12319022 - Method for producing a screen body, and screen (2025-06-03),
4. 12188177 - Apparatus for grinding a fibrous material suspension (2025-01-07),
5. 12006631 - Device and method for producing a fibrous web (2024-06-11),
6. 11946203 - Device and method for transferring a strip of a web (2024-04-02),
7. 11702796 - Device and method for producing a pulp web (2023-07-18),
8. 11649798 - Reversible pump turbine and guide vane for the reversible pump turbine (2023-05-16),
9. 11535983 - Method for producing a fibrous material (2022-12-27),
10. 11414816 - Method and device for treating a fibrous material web in a long nip pressing unit (2022-08-16),
11. 11414718 - Method for the surface treatment of a steel Yankee (2022-08-16),
12. 11306643 - Plant for absorption of individual components in gases (2022-04-19),
13. 11052626 - Screw press (2021-07-06),
14. 10961612 - Method for controlling the coiling temperature of a metal strip (2021-03-30),
15. 10870947 - Process for isolation of hemicelluloses from biomass pulping process waters or spent liquors (2020-12-22),
ANDRITZ AG is a globally leading supplier of plants, equipment, and services for hydropower stations, the pulp and paper industry, the metalworking and steel industries, and solid/liquid separation in the municipal and industrial sectors. The company is headquartered in Graz, Austria, and operates over 280 production sites worldwide. ANDRITZ AG focuses on technologies and innovation to provide sustainable solutions for its diverse customer base.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 22 2026

Andritz Ag
99 Patents

#3 in Graz

#32 in Austria

#7,837 in the World

Graz, AT
Graz, Austria

Andritz Ag

Forward Citations = 188

127 inventors:

goldMedal Helmuth Gabl (19 out of 20 patents)

silverMedal Wilhelm Mausser (11 out of 22 patents)

bronzeMedal Gerald Schadler (9 out of 9 patents)

4.  Klaus Gissing (6 out of 6 patents)

5.  Harald Weigant (6 out of 9 patents)

Please report any incorrect information to [email protected]
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