For the Inventor, By the Inventor

Enter assignee name

Cologne, Germany

Leybold Durferrit Gmbh

USPTO Granted Patents = 22

Forward Citations = 94

Loading Chart...

Loading Chart...

44 inventors (with patents filed for the assignee):

Franz Hugo (7 out of 26 patents)

Erwin Wanetzky (3 out of 14 patents)

Alok Choudhury (3 out of 14 patents)

4. Alfred Henn (3 out of 5 patents)

5. Ulrich Betz (2 out of 6 patents)

6. Harald Scholz (2 out of 14 patents)

7. Peter Minarski (2 out of 4 patents)

8. Wilfried Goy (2 out of 8 patents)

9. Albrecht Melber (2 out of 10 patents)

10. Matthias Blum (2 out of 13 patents)

11. Felix Muller (2 out of 6 patents)

12. Friedrich Preisser (2 out of 9 patents)

13. Otto W Stenzel (2 out of 21 patents)

14. Michael Protzmann (1 out of 4 patents)

15. Michael Schaefer (1 out of 2 patents)

22 patents: Sort by Forward Citations

1. 6085827 - Method for the directed solidification of molten metal and a casting (2000-07-11),

2. 5544194 - Apparatus for degreasing electrically conductive material (1996-08-06),

3. 5532446 - Magnetic deflection system for a high-power electron beam (1996-07-02),

4. 5505008 - Method for recycling materials containing plastic, rubber or lacquer (1996-04-09),

5. 5503215 - Precision casting system with lock (1996-04-02),

6. 5480127 - Apparatus for the melting and treatment of metal (1996-01-02),

7. 5479438 - Apparatus for fusing a solid layer of electrically conductive material (1995-12-26),

8. 5478057 - Apparatus for the heat treatment of workpieces (1995-12-26),

9. 5445789 - Method and apparatus for degreasing and compacting electrically (1995-08-29),

10. 5425047 - Closed induction furnace with a tilting apparatus (1995-06-13),

11. 5416793 - Induction melting apparatus sealed against the atmosphere (1995-05-16),

12. 5383980 - Process for hardening workpieces in a pulsed plasma discharge (1995-01-24),

13. 5372655 - Method for the treatment of alloy steels and refractory metals (1994-12-13),

14. 5343492 - Closed induction furnace for the melting and casting of substances (1994-08-30),

15. 5294096 - Power supply coil for the ceramic-free outlet of a melting pot (1994-03-15),

Leybold Durferrit GmbH is a leading provider of vacuum technology solutions for various industries. With a strong focus on innovation and customer satisfaction, the company offers a wide range of high-quality products and services to meet the needs of its clients. From vacuum pumps to leak detectors, Leybold Durferrit GmbH is committed to delivering reliable and efficient solutions for a wide range of applications.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

22 Patents

#33 in Cologne

#2,091 in Germany

#27,908 in the World

Cologne, Germany

Leybold Durferrit Gmbh

Forward Citations = 94

44 inventors:

Franz Hugo (7 out of 26 patents)

Erwin Wanetzky (3 out of 14 patents)

Alok Choudhury (3 out of 14 patents)

4. Alfred Henn (3 out of 5 patents)

5. Ulrich Betz (2 out of 6 patents)

Please report any incorrect information to support@idiyas.com

Loading…