Werner Bonrath

This inventor holds 99 USPTO granted patents and 3 published patent applications and 27 EPO patents, primarily in Catalytic Processes (CPC class C07C29-17). Top assignees: Dsm IP Assets B.v., Roche Vitamins Inc., Hoffmann-La Roche Inc.. Active years: 1996-2023.

USPTO Granted Patents = 99 (Patent Applications = 3)

% Patents Active = 84.8

EPO Patents = 27 (Patent Applications = 15)

Average Co-Inventor Count = 2.9

ph-index = 4

Forward Citations = 53(Granted Patents)

Forward Citations (Not Self Cited) = 39(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Freiberg, DE (2011)
Frelburg, DE (2013)
Freiburg, DE (1996 - 2015)
Basel, CH (2013 - 2018)
Kaiseraugst, CH (2014 - 2023)

Company Filing History:

Hoffmann-La Roche Inc.

Dsm IP Assets B.v. a Netherlands Corporation

patent

Years Active: 1996-2023

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Areas of Expertise:

Hydrogenation

Vitamin A Synthesis

Asymmetric Reactions

Chiral Compounds

Metal Catalysts

Dehydrogenation

Selective Reduction

Intermediates

Transesterification

Chiral Pyrrolidines

Isomerization

Tetrahydromyrcenol

99 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11851404 - Intermediates for the vitamin A synthesis (2023-12-26),

2. 11851402 - Specific dehydrogenation process (I) (2023-12-26),

3. 11465130 - Metal powderdous catalyst for hydrogenation processes (2022-10-11),

4. 11167270 - Metal powderdous catalyst for hydrogenation processes (2021-11-09),

5. 11136277 - Process for the production of beta-springene (2021-10-05),

6. 11078178 - 6-chromanol derivatives and their synthesis (2021-08-03),

7. 11014063 - Device for processing and conditioning of material transported through the device (2021-05-25),

8. 10975009 - Selective reduction of aldehydes and ketones (2021-04-13),

9. 10752569 - Process for the manufacture of 2,6-dimethyl-5-hepten-1-al (2020-08-25),

10. 10450250 - Production of farnesol (2019-10-22),

11. 10370314 - Selective reduction of esters to alcohols (2019-08-06),

12. 10029970 - Method for producing specific α, β-unsaturated aldehydes (2018-07-24),

13. 10005710 - Process of production of 1-(5,5-dimethylcyclohex-1-en-1-yl)ethanone and 1-(5,5-dimethylcyclohex-6-en-1-yl )ethanone (2018-06-26),

14. 9981935 - Formation of chiral 4-chromanones using chiral pyrrolidines in the presence of acids (2018-05-29),

15. 9957228 - Process of production of 7,8-dihydro-C15-aldehyde (2018-05-01),

Title: Werner Bonrath: A Pioneer in Organic Synthesis Patents

Introduction

Werner Bonrath, based in Freiburg, Germany, is a prominent inventor recognized for his remarkable contributions to organic synthesis. With a portfolio of 99 patents, Bonrath's work has significantly influenced the development of compounds used in the synthesis of vital nutrients, particularly vitamin A and its derivatives.

Latest Patents

Among his latest patents, Bonrath has developed innovative processes for synthesizing intermediates essential for vitamin A synthesis. His recent inventions disclose methods for creating new compounds that are especially valuable in organic synthesis, including the synthesis of β-carotene and related derivatives such as canthaxanthin, astaxanthin, and zeaxanthin. Furthermore, his specific dehydrogenation process presents novel techniques for transforming specific compounds, enhancing the efficiency of chemical applications in various industries.

Career Highlights

Bonrath has had a distinguished career working with leading companies in the pharmaceutical and nutritional sectors. Notably, he has been associated with DSM IP Assets B.V. and Roche Vitamins Inc., where his expertise in organic chemistry and patent development helped drive innovative projects forward. His prolific output and dedication to research highlight his role as a leader in the field.

Collaborations

In his journey as an inventor, Bonrath has collaborated with notable professionals such as Thomas Netscher and Jonathan Alan Medlock. Their combined efforts have contributed to advancing techniques and expanding the boundaries of organic synthesis research.

Conclusion

Werner Bonrath's substantial contributions to the field of organic synthesis through his patents and collaborations underscore the importance of innovation in developing essential compounds. His work continues to influence the scientific community and contributes to the advancement of nutritional sciences, cementing his legacy as a key figure in the invention of processes that shape our understanding of vitamin A synthesis.