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For the Inventor, By the Inventor

Bad Soden am Taunus, Germany

Siegfried Schiessler

USPTO Granted Patents = 15

Average Co-Inventor Count = 2.7

ph-index = 6

Forward Citations = 63(Granted Patents)


Location History:

  • Frankfurt-am-Main, DE (1976 - 1980)
  • Bad Soden am Taunus, DE (1986 - 1994)
  • Bad Soden, DE (1997)

Company Filing History:

goldMedal15 out of 6,662 
 
Hoechst Aktiengesellschaft
 patents

Years Active: 1976-1997

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15 patents (USPTO):Explore Patents
1. 5698705 - Isoindoline pigments (1997-12-16),
2. 5329046 - Biscationic acid amide and imide derivatives and processes for their (1994-07-12),
3. 5074919 - Preparation of vat dyes and pigments of the perinone series (1991-12-24),
4. 5071483 - Process for the preparation of pigment preparations of the anthanthrone (1991-12-10),
5. 5071482 - Pigment preparations (1991-12-10),
6. 4939193 - Use of the alpha-modification of cis-naphthoylenebis(benzimidazole) for (1990-07-03),
7. 4684753 - Process for preparing 1,3,6,8-tetrabromopyrene (1987-08-04),
8. 4599431 - Process for the preparation of naphthalene-1,4,5,8-tetracarboxylic acid (1986-07-08),
9. 4224222 - Process for preparing copper phthalocyanine pigments of the (1980-09-23),
10. 4153602 - Process for the preparation of a (1979-05-08),
11. 4056534 - Process for preparing copper phthalocyanine pigments of the (1977-11-01),
12. 4018791 - Process for the preparation of highly pure halogenated phthalocyanine (1977-04-19),
13. 4010240 - Process for the regeneration of sulfuric acid (1977-03-01),
14. 4010180 - Process for the purification of copper phthalocyanine (1977-03-01),
15. 3972987 - Process for regenerating sulfuric acid (1976-08-03),

Title: The Innovations of Siegfried Schiessler

Introduction

Siegfried Schiessler is a notable inventor based in Bad Soden am Taunus, Germany. He has made significant contributions to the field of chemistry, particularly in the development of novel pigments and chemical derivatives. With a total of 15 patents to his name, Schiessler's work has had a lasting impact on various applications in the industry.

Latest Patents

Among his latest patents are innovative isoindoline pigments, which are characterized by the formula (I) where R¹ is --CN and R² is either CN or a 5- to 7-membered hetero-cycle. Additionally, he has developed biscationic acid amide and imide derivatives, along with processes for their synthesis. These advancements showcase his expertise in creating new chemical compounds with potential applications in various sectors.

Career Highlights

Schiessler has had a distinguished career, working at Hoechst Aktiengesellschaft, a leading company in the chemical industry. His role at Hoechst has allowed him to collaborate with other talented professionals and contribute to groundbreaking research and development projects.

Collaborations

Throughout his career, Schiessler has worked alongside esteemed colleagues such as Ernst Spietschka and Erwin Dietz. These collaborations have fostered an environment of innovation and creativity, leading to the successful development of numerous patents.

Conclusion

Siegfried Schiessler's contributions to the field of chemistry through his patents and collaborations highlight his role as a significant inventor. His work continues to influence the industry and inspire future innovations.

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