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For the Inventor, By the Inventor

Liestal, Switzerland

Werner Stegmann

USPTO Granted Patents = 13

Average Co-Inventor Count = 2.4

ph-index = 5

Forward Citations = 66(Granted Patents)


Location History:

  • Liestal, DE (1990)
  • Liestal, CH (1986 - 1993)

Company Filing History:

goldMedal13 out of 6,850 
 
Ciba-geigy Corporation
 patents

Years Active: 1986-1993

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13 patents (USPTO):Explore Patents
1. 5258540 - Cyclohexyl substituted hydroxybenyzlphosphonates (1993-11-02),
2. 5240975 - Liquid substituted 2H-benzotriazole mixtures, stabilized compositions (1993-08-31),
3. 5229521 - Process for the preparation of symmetrical (1993-07-20),
4. 5157141 - Process for the preparation of hydroxybenzylphosphonates (1992-10-20),
5. 5110978 - Process for the preparation of phenolic thiocarboxylic acid esters (1992-05-05),
6. 5095062 - Stabilized compositions containing liquid substituted 2H-benzotriazole (1992-03-10),
7. 5047591 - Single-stage process for producing bis-(amino-nitrophenyl)-methane (1991-09-10),
8. 4973701 - Liquid substituted 2H-benzotriazole mixtures, stabilized compositions (1990-11-27),
9. 4921966 - Process for the preparation of liquid mixtures of alkylated (1990-05-01),
10. 4874885 - Process for the preparation of mercaptomethylphenols (1989-10-17),
11. 4863982 - Isocyanuric acid derivatives (1989-09-05),
12. 4691058 - Process for producing 1-hydroxy ketones (1987-09-01),
13. 4623745 - Process for producing phenolic thiocarboxylic esters (1986-11-18),

Title: Werner Stegmann: Innovator in Chemical Stabilizers

Introduction

Werner Stegmann is a notable inventor based in Liestal, Switzerland. He has made significant contributions to the field of chemical stabilizers, holding a total of 13 patents. His work focuses on developing novel compounds that enhance the stability and efficacy of various chemical mixtures.

Latest Patents

Among his latest patents, Stegmann has developed cyclohexyl substituted hydroxybenzyldiphosphonates. These compounds are characterized by a specific formula where R₁ is hydrogen, R₂ is methyl, tert-butyl, or cyclohexyl, and R₇ and R₈ are independently C₁-C₁₈ alkyl, phenyl, or C₇-C₁₈ alkylphenyl. These compounds serve as effective stabilizers. Additionally, he has worked on liquid substituted 2H-benzotriazole mixtures. These mixtures are prepared through a complex process involving alkylation and exhibit outstanding efficacy in protecting organic substrates from light-induced deterioration.

Career Highlights

Stegmann is associated with Ciba-Geigy Corporation, a company known for its innovative contributions to the chemical industry. His work has significantly impacted the development of stabilizers used in various applications, enhancing the longevity and performance of products.

Collaborations

Throughout his career, Stegmann has collaborated with notable colleagues, including Reto Luisoli and Roland A. Winter. These collaborations have fostered innovation and contributed to the advancement of chemical stabilization technologies.

Conclusion

Werner Stegmann's contributions to the field of chemical stabilizers through his patents and collaborations highlight his role as a key innovator. His work continues to influence the industry, ensuring the stability and effectiveness of chemical products.

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