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For the Inventor, By the Inventor

Bad Soden am Taunus, Germany

Bernhard Wojtech

This inventor holds 10 USPTO granted patents. Top assignee: Hoechst Aktiengesellschaft. Active years: 1976-1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Bernhard Wojtech. Retrieved from https://idiyas.com/inventor/bernhard-wojtech

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 3.6

ph-index = 4

Forward Citations = 76(Granted Patents)


Location History:

  • Bad Soden, DE (1976 - 1980)
  • Bad Soden am Taunus, DE (1983 - 1991)

Company Filing History:

goldMedal10 out of 6,705 
 
Hoechst Aktiengesellschaft
 patents

Years Active: 1976-1991

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10 patents (USPTO):Explore Patents
1. 5073622 - Process for the preparation of novolak resins with low metal ion content (1991-12-17),
2. 5068358 - Process for extracting N-methyl-2-pyrrolidone (1991-11-26),
3. 4986974 - Process for the separation of halogenated hydrocarbons from hydrochloric (1991-01-22),
4. 4864065 - Process for removing halogenated hydroxyaromatics from aqueous solutions (1989-09-05),
5. 4814518 - Process for extracting nitrohydroxyaromatics from aqueous solutions (1989-03-21),
6. 4720577 - Process for the extraction of carboxylic acids from dilute aqueous (1988-01-19),
7. 4626605 - Process for extracting phenols from aqueous solutions (1986-12-02),
8. 4373073 - Process for the preparation of glycidyl ethers of monohydric or (1983-02-08),
9. 4196180 - Purification of phosphoric acid by means of organic solvents (1980-04-01),
10. 3996336 - Purification of phosphoric acid (1976-12-07),

Title: The Innovative Journey of Bernhard Wojtech

Introduction

Bernhard Wojtech, an accomplished inventor based in Bad Soden am Taunus, Germany, has contributed significantly to the field of materials science through his innovative patents. With a total of 10 patents to his name, Wojtech's work primarily focuses on the development of novel processes in chemical applications, particularly in the manufacturing of resins and polymers.

Latest Patents

One of Bernhard Wojtech's latest patents is a method for the preparation of novolak resins with low metal ion content. This process involves treating a conventional resin in an organic solution with an acidic complex-forming compound in an aqueous phase, ultimately resulting in resins suitable for producing photoresists.

Another notable patent is related to the extraction of N-methyl-2-pyrrolidone (NMP). In this invention, Wojtech outlines a process for efficiently separating NMP from aqueous industrial solutions, particularly during the production of heat-resistant polymers like polyamides and polyimides. The extraction utilizes specific phenolic compounds as extractants, enhancing the separation process.

Career Highlights

Bernhard Wojtech is currently employed at Hoechst Aktiengesellschaft, where his expertise in chemical innovation continually drives projects forward. His ability to innovate not only reflects in his patents but also showcases his thorough understanding of chemistry and materials science.

Collaborations

Throughout his career, Wojtech has had the opportunity to collaborate with esteemed colleagues such as Wolfgang Scheibitz and Siegbert Rittner. These partnerships have allowed for a synergistic approach to research and development, leading to the ideation and realization of numerous inventive processes.

Conclusion

Bernhard Wojtech's contributions to the field of chemical engineering highlight the importance of innovation in material development. Through his patents, he has significantly impacted the way resins and polymers are manufactured, improving processes that serve a variety of industrial applications. His work continues to inspire future advancements in chemical research and technology.

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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