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For the Inventor, By the Inventor

Selters, Germany

Adolf Kroh

This inventor holds 15 USPTO granted patents, primarily in Colorant Chemistry. Top assignee: Hoechst Aktiengesellschaft. Active years: 1976-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Adolf Kroh. Retrieved from https://idiyas.com/inventor/adolf-kroh

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

Calculating rank
USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 7

Forward Citations = 122(Granted Patents)


Location History:

  • Munster, Oberlahnkreis, DE (1976 - 1977)
  • Munster, Taunus, DE (1978)
  • Selters, DE (1980 - 1994)

Company Filing History:

goldMedal15 out of 6,705 
 
Hoechst Aktiengesellschaft
 patents

Years Active: 1976-1994

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Areas of Expertise:
Quinacridone Pigments
Triboelectric Effects
Electrophotographic Colorants
Thermoplastic Plastics
Rheological Properties
Pigment Preparations
Naphthalimide Compounds
Gamma-Crystal Modification
Colorant Processes
Addition Compounds
High-Hiding Pigments
Mass Coloring
15 patents (USPTO):Explore Patents
1. 5368641 - Modified 2,9-dimethylquinacridone pigments, process for their (1994-11-29),
2. 5137576 - Quinacridones having selectively adjusted triboelectric effects (1992-08-11),
3. 5070159 - Addition compounds, a process for the preparation, and their use, based (1991-12-03),
4. 4986852 - Pigments and use thereof (1991-01-22),
5. 4777105 - Magenta colorant for electrophotographic recording processes (1988-10-11),
6. 4758665 - Process for preparing high-hiding gamma-modification of unsubstituted (1988-07-19),
7. 4732618 - Powdered pigments with improved rheological properties, processes for (1988-03-22),
8. 4631330 - Addition compounds and process for their preparation (1986-12-23),
9. 4405734 - Process for mass coloring thermoplastic plastics (1983-09-20),
10. 4400515 - Quinacridone mixtures, process for their manufacture and their use as (1983-08-23),
11. 4217265 - Pigment preparations (1980-08-12),
12. 4212975 - Process for the manufacture of the gamma-crystal modification of linear (1980-07-15),
13. 4118387 - Naphthalimide-4,5-dicarboxylic acids (1978-10-03),
14. 4007192 - Naphthalimide-4,5-dicarboxylic acids (1977-02-08),
15. 3931186 - Process for preparing naphtholyene arylimidazol-peri-dicarboxylic acid (1976-01-06),

Title: Innovative Contributions of Adolf Kroh in the Field of Quinacridone Pigments

Introduction

Adolf Kroh, an accomplished inventor based in Selters, Germany, has made significant strides in the development of pigments, particularly in the realm of quinacridone compounds. With a total of 15 patents to his name, Kroh's work exemplifies the intersection of chemistry and innovation, contributing valuable insights to various industries that utilize pigments for different applications.

Latest Patents

Among Kroh's latest patents is a groundbreaking process for the preparation of modified 2,9-dimethylquinacridone pigments. This innovative method outlines a unique way to create crystalline particles with a specific size and shape, enhancing their performance in various materials. Furthermore, his patent on quinacridones with selectively adjusted triboelectric effects reveals his forward-thinking approach to material science, catering to the needs of modern applications in which electrical properties are essential.

Career Highlights

Kroh's career is marked by his affiliation with Hoechst Aktiengesellschaft, where he has significantly influenced the company's direction in pigment technology. His contributions to the field are underscored by a series of successful patent applications, which have propelled the company's reputation in the pigments sector. Through diligent research and innovation, Kroh has established himself as a key figure in the industry.

Collaborations

Collaboration plays a crucial role in Kroh's journey as an inventor. He has worked alongside esteemed colleagues such as Otto Fuchs and Erwin Dietz, whose insights and expertise have complemented his own. Together, they have been instrumental in pioneering advancements in pigment technology, fostering a collaborative spirit that enhances innovation.

Conclusion

Adolf Kroh's work in the field of quinacridone pigments stands as a testament to the power of innovation in science and technology. With 15 patents to his credit, his contributions have not only advanced the understanding of pigment properties but have also significantly impacted their practical applications. As he continues to explore new frontiers in material science, Kroh remains an inspiring example for current and future inventors in the industry.

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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