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Escher Wyss Limited

USPTO Granted Patents = 198

Trademarks = 2

Forward Citations = 2,064

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137 inventors (with patents filed for the assignee):

Rolf Lehmann (28 out of 45 patents)

Mario Biondetti (22 out of 26 patents)

Alfred Christ (18 out of 26 patents)

4. Wolf-Gunter Stotz (16 out of 30 patents)

5. Alfred Bubik (15 out of 40 patents)

6. Helmut Miller (10 out of 11 patents)

7. Ignazio Marchioro (10 out of 10 patents)

8. Herbert Holik (8 out of 34 patents)

9. Rudiger Kurtz (8 out of 27 patents)

10. Albrecht Kahmann (8 out of 9 patents)

11. Siegfried Reutter (7 out of 9 patents)

12. Hans-Joachim Schultz (6 out of 6 patents)

13. Hans Schnell (5 out of 14 patents)

14. Christoph Link (5 out of 19 patents)

15. Wolfgang Wuhrer (5 out of 9 patents)

Core Competencies:

Papermaking Machines

Dewatering Apparatus

Controlled Deflection Roll

Flotation Apparatus

Hydro-Electric Turbo-Machine

Adjustable Propeller

Centrifugal Separator

Fiber Stock Sorting

Oil Infeed Device

Waste Paper Treatment

Rolling Mill Technology

Dispersion Apparatus

198 patents: Sort by Forward Citations

1. 4686005 - Method of washing stock suspensions by removing undesired material (1987-08-11),

2. 4650125 - Method for sorting fiber stock, especially for manufacturing paper, and (1987-03-17),

3. 4600594 - Process for the conditioning of crushed oil-containing seeds prior to (1986-07-15),

4. 4574496 - Ring-gap nozzle and its application in a fluidized bed dryer (1986-03-11),

5. 4570314 - Press roll (1986-02-18),

6. 4563940 - Oil infeed device for an adjustable pitch propeller (1986-01-14),

7. 4560474 - Flotation apparatus for floating fiber suspensions extracted from waste (1985-12-24),

8. 4557826 - Method of and apparatus for separating tacky contaminants from a stock (1985-12-10),

9. 4556573 - Method for treating soybeans (1985-12-03),

10. 4552462 - Stirrer apparatus for paper stock (1985-11-12),

11. 4543162 - Multi-ply headbox having adjustable outlet slices (1985-09-24),

12. 4540341 - Adjustable propeller for marine vessel drive (1985-09-10),

13. 4538765 - Method for defiberizing waste paper in a thick stock range (1985-09-03),

14. 4525916 - Method of coupling coaxial shafts (1985-07-02),

15. 4509237 - Arrangement containing a controlled deflection roll and related regulator (1985-04-09),

Escher Wyss Limited is a global engineering company specializing in manufacturing advanced industrial machinery and equipment. With over 100 years of expertise, Escher Wyss offers cutting-edge solutions in various industries such as power generation, pulp and paper, oil and gas, and wastewater treatment. Their highly skilled team of engineers and technicians develop innovative products and services that help businesses optimize their operations and improve efficiency. Visit their website to learn more about Escher Wyss and explore their extensive range of state-of-the-art solutions.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

198 Patents

#1 in Zurich

#1 in C

#4,132 in the World

Zurich, undefined

Escher Wyss Limited

Forward Citations = 2,064

137 inventors:

Rolf Lehmann (28 out of 45 patents)

Mario Biondetti (22 out of 26 patents)

Alfred Christ (18 out of 26 patents)

4. Wolf-Gunter Stotz (16 out of 30 patents)

5. Alfred Bubik (15 out of 40 patents)

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