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For the Inventor, By the Inventor

Troisdorf, Germany

Rudolf Stephan

This inventor holds 5 USPTO granted patents. Top assignee: Dynamit Nobel Aktiengesellschaft. Active years: 1976-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Rudolf Stephan. Retrieved from https://idiyas.com/inventor/rudolf-stephan-htegv542

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 2

Forward Citations = 11(Granted Patents)


Location History:

  • Troisdorf-Sieglar, DE (1976 - 1978)
  • Troisdorf, DE (1981 - 1984)

Company Filing History:

goldMedal5 out of 658 
 
Dynamit Nobel Aktiengesellschaft
 patents

Years Active: 1976-1984

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5 patents (USPTO):Explore Patents
1. 4468353 - Method of preparing alkoxymethylene compounds (1984-08-28),
2. 4277418 - Method of preparing alkoxymethylene compounds (1981-07-07),
3. 4080393 - Method of rectifying solvents of the chlorinated hydrocarbon series (1978-03-21),
4. 4069265 - Stabilization of 1,1,1-trichloroethane with a four component system (1978-01-17),
5. 3959397 - Stabilization of 1,1,1-trichloroethane with a three component system (1976-05-25),

Title: Rudolf Stephan: Innovator in Alkoxymethylene Compounds

Introduction

Rudolf Stephan is a notable inventor based in Troisdorf, Germany. He has made significant contributions to the field of chemistry, particularly in the preparation of alkoxymethylene compounds. With a total of 5 patents to his name, his work has had a lasting impact on the industry.

Latest Patents

One of Rudolf Stephan's latest patents involves a method of preparing alkoxymethylene compounds. This innovative process improves the alkoxylation of a compound that has a reactive methylene group. The method entails contacting the compound with an orthoformic acid trialkyl ester in the presence of a catalyst. The improvement lies in employing at least 1.6 moles of orthoformic acid ester per mole of the compound, while carrying out the process in the presence of a catalyst from a specific group, including aliphatic carboxylic acids and aromatic sulphonic acids.

Career Highlights

Rudolf Stephan is associated with Dynamit Nobel Aktiengesellschaft, a company known for its advancements in chemical manufacturing. His work has been instrumental in developing new methods that enhance the efficiency and effectiveness of chemical processes.

Collaborations

Throughout his career, Rudolf has collaborated with esteemed colleagues such as Hermann Richtzenhain and Otto Ackermann. These partnerships have fostered innovation and contributed to the success of their projects.

Conclusion

Rudolf Stephan's contributions to the field of chemistry, particularly in the preparation of alkoxymethylene compounds, highlight his role as a significant inventor. His patents and collaborations reflect a commitment to advancing chemical processes and innovation.

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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