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For the Inventor, By the Inventor

Troisdorf, Germany

Paul Riegger

This inventor holds 3 USPTO granted patents. Top assignee: Dynamit Nobel Aktiengesellschaft. Active years: 1977-1979.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Paul Riegger. Retrieved from https://idiyas.com/inventor/paul-riegger

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

USPTO Granted Patents = 3

% Patents Active = 100.0

Average Co-Inventor Count = 2.3

ph-index = 2

Forward Citations = 5(Granted Patents)


Location History:

  • Troisdorf, Sieglar, DE (1978)
  • Troisdorf, DE (1977 - 1979)

Company Filing History:

goldMedal3 out of 658 
 
Dynamit Nobel Aktiengesellschaft
 patents

Years Active: 1977-1979

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3 patents (USPTO):Explore Patents
1. 4166075 - Method of preparing xylenes chlorinated in the nucleus (1979-08-28),
2. 4091017 - Method of preparing terephthalic acid dichloride and isophthalic acid (1978-05-23),
3. 4056454 - Process for the preparation of (1977-11-01),

Title: Paul Riegger: Innovator in Chemical Processes

Introduction

Paul Riegger is a notable inventor based in Troisdorf, Germany. He has made significant contributions to the field of chemical processes, holding a total of 3 patents. His work focuses on improving methods for synthesizing important chemical compounds.

Latest Patents

Riegger's latest patents include a method for preparing xylenes chlorinated in the nucleus. This innovative process involves contacting xylene with chlorine in the presence of a catalyst, specifically an iron halide or antimony halide, along with a co-catalyst that is an aliphatic, halogenated, or nonhalogenated hydrocarbon with an oxygen function. Another significant patent is for the production of terephthalic acid dichloride and isophthalic acid dichloride. This method utilizes hydrolysis with water as a gas and employs a Friedel-Crafts catalyst, ensuring a fast reaction with high yield.

Career Highlights

Paul Riegger is associated with Dynamit Nobel Aktiengesellschaft, where he has applied his expertise in chemical engineering. His innovative approaches have contributed to advancements in the production of essential chemical compounds.

Collaborations

Riegger has collaborated with notable coworkers such as Hermann Richtzenhain and Georg Blumenfeld, further enhancing the impact of his work in the field.

Conclusion

Paul Riegger's contributions to chemical processes through his patents demonstrate his innovative spirit and commitment to advancing the industry. His work continues to influence the field of chemical engineering.

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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