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For the Inventor, By the Inventor

Zofingen, Switzerland

Siegfried Aktiengesellschaft


USPTO Granted Patents = 42


Forward Citations = 192

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41 inventors (with patents filed for the assignee):

goldMedal Kurt Thiele (22 out of 24 patents)

silverMedal Ulrich Jahn (12 out of 13 patents)

bronzeMedal Ludwig Zirngibl (11 out of 11 patents)

4.  Rudolf Adrian (7 out of 7 patents)

5.  Johanna Fischer (7 out of 7 patents)

6.  Beat Theodor Weber (6 out of 24 patents)

7.  Quazi Ahmed (6 out of 6 patents)

8.  Rene Gnehm (5 out of 5 patents)

9.  Jacques Meyer (3 out of 4 patents)

10.  Georg Mixich (3 out of 3 patents)

11.  Walter E Scharen (3 out of 3 patents)

12.  Felix Geissmann (3 out of 4 patents)

13.  Ben Pan (2 out of 3 patents)

14.  Stefan Sahli (2 out of 4 patents)

15.  Pascal Prinderre (2 out of 2 patents)


Core Competencies:
Racemic Nicotine
Enantiomeric Separation
Buprenorphine Synthesis
Mesoporous Dosage Forms
Cholesterol-Lowering Compounds
Imidazolyl Vinyl Ethers
Theophylline Derivatives
Pyridyl Alkyl Esters
Herbicide Composition
Xanthine Oxidase Inhibitor
Pharmaceutical Formulation
Defoliant Composition

42 patents:

1. 11407730 - Preparation of racemic nicotine by reaction of ethyl nicotinate with N-vinylpyrrolidone in the presence of an alcoholate base and subsequent process steps (2022-08-09),
2. 11279685 - Enantiomeric separation of racemic nicotine by addition of an O,O″-disubstituted tartaric acid enantiomer (2022-03-22),
3. 11104630 - Synthesis of mono-chlorinated acetophenone (2021-08-31),
4. 10927122 - Synthesis of noroxymorphone (2021-02-23),
5. 10391091 - Method of manufacturing buprenorphine and analogues thereof from oripavine (2019-08-27),
6. 10035807 - Method of manufacturing stereoisomers of buprenorphine and analogues thereof (2018-07-31),
7. 10034883 - Mesoporous dosage forms for poorly soluble drugs (2018-07-31),
8. 10010510 - Oral pharmaceutical formulation (2018-07-03),
9. 8921557 - Preparation of low impurity opiates in a continuous flow reactor (2014-12-30),
10. 4689233 - Coronary therapeutic agent in the form of soft gelatin capsules (1987-08-25),
11. 4668786 - P-fluorobenzoyl-piperidino alkyl theophylline derivatives (1987-05-26),
12. 4652659 - Method for the production of acemetacin (1987-03-24),
13. 4603204 - Theophylline derivatives (1986-07-29),
14. 4554356 - Method for production of imidazolyl vinyl ethers (1985-11-19),
15. 4550175 - Process for the stereospecific preparation of (1985-10-29),
Siegfried Aktiengesellschaft is a global contract development and manufacturing organization (CDMO) specializing in the production of active pharmaceutical ingredients (APIs) and drug products. With over 140 years of experience, Siegfried offers a comprehensive range of services, including process development, analytical methods, quality control, and regulatory support. They serve the pharmaceutical, biotech, and veterinary industries, providing high-quality products and solutions tailored to meet the specific needs of their customers.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 6 2026

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42 Patents

#1 in Zofingen

#317 in Switzerland

#15,868 in the World

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Zofingen, Switzerland

Siegfried Aktiengesellschaft

Forward Citations = 192

41 inventors:

goldMedal Kurt Thiele (22 out of 24 patents)

silverMedal Ulrich Jahn (12 out of 13 patents)

bronzeMedal Ludwig Zirngibl (11 out of 11 patents)

4.  Rudolf Adrian (7 out of 7 patents)

5.  Johanna Fischer (7 out of 7 patents)

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