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For the Inventor, By the Inventor

Krefeld, Germany

Dieter Freitag

This inventor holds 177 USPTO granted patents and 3 published patent applications and 6 EPO patents, primarily in Polycarbonate Production (CPC class 528196). Top assignees: Bayer Aktiengesellschaft, Agfa-Gevaert Ag. Active years: 1976-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Dieter Freitag. Retrieved from https://idiyas.com/inventor/dieter-freitag

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

USPTO Granted Patents = 177 

% Patents Active = 100.0

 

Average Co-Inventor Count = 4.1

ph-index = 23

Forward Citations = 2,107(Granted Patents)

Forward Citations (Not Self Cited) = 1,992(Dec 10, 2025)


Inventors with similar research interests:

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Location History:

  • Krefeld-Bockum, DE (1977)
  • Krefeld-Taar, DE (1978)
  • Krefeld-Traar, DE (1976 - 1986)
  • Krefeld-Uerdingen, DE (1991)
  • Krefeld, DE (1976 - 1998)

Company Filing History:

goldMedal175 out of 12,268 
 
Bayer Aktiengesellschaft
 patents
silverMedal2 out of 1,473 
 
Agfa-Gevaert Ag
 patents

Years Active: 1976-1998

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Areas of Expertise:
Polycarbonate
Thermoplastic Blends
Flame-Retardant Materials
Molding Compositions
Heat Resistant
Polyamide
Oligocarbonates
Polyester Carbonates
Chemical Stabilization
Thermal Depolymerization
Optical Applications
Bisphenols
177 patents (USPTO):Explore Patents
1. 5849414 - Production of scratch-resistant polycarbonate moulded parts (1998-12-15),
2. 5668232 - Process for the production of polyisoolefins (1997-09-16),
3. 5668204 - Stabilization of polycarbonates having high heat distortion temperatures (1997-09-16),
4. 5512632 - Thermoplastic blends containing polyesters and polyester carbonates (1996-04-30),
5. 5416161 - Production of blend systems by the condensation of oligocarbonates in (1995-05-16),
6. 5416143 - Highly flame-retardant polyamide moulding compounds (1995-05-16),
7. 5389712 - Difficultly flammable polyamide moulding materials (1995-02-14),
8. 5373082 - Process for the production of thermoplastic polycarbonates (1994-12-13),
9. 5340905 - Process for the preparation of thermoplastic polycarbonates (1994-08-23),
10. 5334692 - Highly branched polyphosphonates based on melamine (1994-08-02),
11. 5326800 - Use of salts in combination with halogenated phthalimides for flameproof (1994-07-05),
12. 5317083 - Process for isolating polycarbonates from their solutions with tube (1994-05-31),
13. 5314985 - Molten, catalytic process for the preparation of polycarbonates (1994-05-24),
14. 5310793 - Mixtures of polyalkylene terephthalates, new polycarbonates and/or (1994-05-10),
15. 5300550 - Thermoplastic molding compositions (1994-04-05),

Title: Dieter Freitag: Prolific Innovator in the Field of Polymers and Moulded Parts

Introduction:

In the realm of polymers and moulded parts, Dieter Freitag from Krefeld, Germany has carved a formidable name for himself. With an impressive portfolio of 165 patents, Freitag's innovative solutions have made significant contributions to the industry. This article explores his latest patents, career highlights, notable collaborations, and the impact of his groundbreaking inventions.

Latest Patents:

Dieter Freitag's recent patents truly exemplify his expertise in the field. One of his notable inventions is the "Production of Scratch-resistant Polycarbonate Moulded Parts." This patent showcases Freitag's commitment to developing materials with enhanced durability and functionality, catering to the growing demands of numerous industries.

Another noteworthy patent is the "Process for the Production of Polyisoolefins." Freitag's invention allows the polymerization of isoolefins, either with or without the inclusion of dienes and other compounds, under specific temperature and pressure conditions. This process enables the production of polyisoolefins with various applications in industries ranging from automotive to construction.

Career Highlights:

During his illustrious career, Dieter Freitag has held positions at renowned companies, including Bayer Aktiengesellschaft and Agfa-Gevaert AG. His tenure at Bayer Aktiengesellschaft provided him with invaluable experience and exposure, allowing him to contribute significantly to the company's research and development efforts.

Collaborations:

Freitag's collaborative efforts have been instrumental in pushing the boundaries of innovation. Among his notable coworkers, Ludwig Bottenbruch and Manfred Schmidt have worked alongside Freitag, contributing to numerous successful projects. These collaborations have not only fostered an environment of knowledge exchange but have also brought together some of the brightest minds in the field.

Conclusion:

Dieter Freitag's remarkable journey as an inventor and his profound contributions to the field of polymers and moulded parts have left an indelible mark on the industry. With an impressive patent portfolio and a track record of successful collaborations, Freitag's work has undoubtedly transformed various sectors and continues to inspire future innovators. His dedication to pushing the boundaries of materials science serves as a testament to the power of innovation and the potential for groundbreaking discoveries in this ever-evolving field.

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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