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For the Inventor, By the Inventor

Frankfurt am Main, Germany

Wolfgang Rieper

USPTO Granted Patents = 17


Average Co-Inventor Count = 2.1

ph-index = 4

Forward Citations = 57(Granted Patents)


Company Filing History:

goldMedal16 out of 6,662 
 
Hoechst Aktiengesellschaft
 patents
silverMedal1 out of 1 
 
Farbwerke Hoechst Aktiengesellschaft
 patent

Years Active: 1976-1993

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17 patents (USPTO):Explore Patents
1. 5266110 - Crystal modification of C.I. Pigment Yellow 16 (1993-11-30),
2. 5243032 - Preparation of azo pigments with low PCB content by coupling in the (1993-09-07),
3. 5194597 - Preparation of a coupling product of bisiazotized (1993-03-16),
4. 5086168 - Monoazo pigments derived from diazotized di- or trichloroanilines, (1992-02-04),
5. 5070159 - Addition compounds, a process for the preparation, and their use, based (1991-12-03),
6. 5066687 - Powdered azo pigments with improved rheological properties, process for (1991-11-19),
7. 4720541 - Process for improving the application properties of disazo pigments (1988-01-19),
8. 4631330 - Addition compounds and process for their preparation (1986-12-23),
9. 4589921 - Process for improving the application properties of pigment yellow 13 (1986-05-20),
10. 4476052 - Azo pigment having improved hiding power and a process for its (1984-10-09),
11. 4410707 - Process for the manufacture of 3-amino-1-phenylpyrazol-5-one (1983-10-18),
12. 4124582 - Process for the purification of azo pigments by stirring an aqueous, (1978-11-07),
13. 4080321 - Monoazo pigments from diazotized acylamino-anilines and acetoacetylamino (1978-03-21),
14. 4048152 - Modified form of disazo pigment CI 20040 (1977-09-13),
15. 3985725 - Quinolino-azo-aceto-acetylaminobenzimidazolone pigments fast to heat (1976-10-12),

Title: The Innovative Contributions of Wolfgang Rieper

Introduction

Wolfgang Rieper is a prominent inventor based in Frankfurt am Main, Germany, recognized for his extensive contributions to the field of pigments and coloring agents. With a remarkable portfolio of 17 patents, Rieper has made significant advancements that have impacted various industries, particularly in the area of azo pigments.

Latest Patents

One of Wolfgang Rieper's latest patents focuses on the crystal modification of C.I. Pigment Yellow 16. This inventive work relates to three new crystal modifications: gamma, delta, and epsilon. These modifications demonstrate distinct characteristics, as evidenced by their reflections in the X-ray diffraction spectrum. The innovative process for creating these new crystal forms involves heat treatment of the already known alpha or beta modifications in selected organic solvents, showcasing Rieper's ingenuity in chemical engineering.

Career Highlights

Throughout his career, Wolfgang Rieper has been associated with well-known companies in the industry, including Hoechst Aktiengesellschaft and Farbwerke Hoechst Aktiengesellschaft. His work in these organizations has allowed him to cultivate his expertise and contribute to numerous advancements in pigments.

Collaborations

During his professional journey, Rieper has collaborated with notable colleagues such as Joachim Ribka and Klaus Hunger. These partnerships have provided a collaborative environment that fosters innovation, resulting in patents that enhance the quality and functionality of pigments.

Conclusion

Wolfgang Rieper's contributions to the field of pigment technology through his patents represent a significant achievement in the innovation landscape. His ongoing research and collaborations continue to pave the way for future advancements, making him a noteworthy inventor in his field. The impact of his work is reflected in the evolving nature of pigments used across various applications, showcasing the importance of his inventive spirit.

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