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For the Inventor, By the Inventor

Cologne, Germany

Gunter Gehrke

This inventor holds 11 USPTO granted patents. Top assignee: Bayer Aktiengesellschaft. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Gunter Gehrke. Retrieved from https://idiyas.com/inventor/gunter-gehrke

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 3

Forward Citations = 20(Granted Patents)


Company Filing History:

goldMedal11 out of 12,266 
 
Bayer Aktiengesellschaft
 patents

Years Active: 1976-1985

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11 patents (USPTO):Explore Patents
1. 4523926 - Mixtures of disperse dyestuffs (1985-06-18),
2. 4342701 - Process for the preparation of 4,5-dinitro-1,8-dihydroxyanthraquinone (1982-08-03),
3. 4296044 - Process for the preparation of cationic anthraquinone dyestuffs (1981-10-20),
4. 4278607 - Process for the preparation of dimethoxyanthraquinones (1981-07-14),
5. 4256460 - Process for dyeing and printing cellulose fibres (1981-03-17),
6. 4255151 - Process for dyeing and printing cellulose fibres (1981-03-10),
7. 4210413 - Transfer printing process (1980-07-01),
8. 4045457 - Anthraquinone dyestuffs (1977-08-30),
9. 4036862 - 1-Amino-2-(bromophenoxy-alkoxy)-4-hydroxy anthraquinone dyestuffs (1977-07-19),
10. 4029680 - Process for the preparation of diamino-dihydroxy anthraquinone disperse (1977-06-14),
11. 3959315 - Anthraquinone dyestuffs (1976-05-25),

Title: Gunter Gehrke: Innovator in Dyestuff Technology

Introduction

Gunter Gehrke is a prominent inventor based in Cologne, Germany. He has made significant contributions to the field of dyestuff technology, holding a total of 11 patents. His work has been instrumental in advancing the methods of producing high-purity dyestuffs.

Latest Patents

Among his latest patents, Gunter Gehrke has developed innovative processes for the preparation of 4,5-dinitro-1,8-dihydroxyanthraquinone. This process allows for the production of 95-99% pure 4,5-dinitro-1,8-dihydroxyanthraquinone, which is essentially free from by-products. The method involves 'direct nitration' of 1,8-dihydroxyanthraquinones or 1,8-dimethoxyanthraquinones, utilizing specific concentrations of sulfuric acid to achieve optimal results.

Career Highlights

Gunter Gehrke has had a distinguished career at Bayer Aktiengesellschaft, where he has been able to apply his expertise in dyestuff technology. His innovative approaches have not only enhanced product quality but have also contributed to the efficiency of production processes within the company.

Collaborations

Throughout his career, Gunter has collaborated with notable colleagues such as Volker Hederich and Hans-Samuel Bien. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Gunter Gehrke's contributions to dyestuff technology and his impressive portfolio of patents highlight his role as a leading inventor in the field. His work continues to influence the industry and pave the way for future advancements.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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