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For the Inventor, By the Inventor

Hino, Japan

Shizuo Nagahama

This inventor holds 4 USPTO granted patents. Top assignee: Teijin Limited. Active years: 1976-1979.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shizuo Nagahama. Retrieved from https://idiyas.com/inventor/shizuo-nagahama

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

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 4.4

ph-index = 3

Forward Citations = 27(Granted Patents)


Location History:

  • Hino, JA (1976 - 1978)
  • Hino, JP (1979)

Company Filing History:

goldMedal4 out of 1,605 
 
Teijin Limited
 patents

Years Active: 1976-1979

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4 patents (USPTO):Explore Patents
1. 4167506 - Diazaphenalene derivatives and resin containing color compositions (1979-09-11),
2. 4067870 - 8-Benzimido substituted quinaphthalone derivatives (1978-01-10),
3. 3966830 - Process for the nitration of halogenated benzene derivatives (1976-06-29),
4. 3936509 - Process for separating dimethyl naphthalenes comprising 2,6-dimethyl (1976-02-03),

Title: Shizuo Nagahama: Innovator in Organic Pigments

Introduction

Shizuo Nagahama is a notable inventor based in Hino, Japan. He has made significant contributions to the field of organic pigments, holding a total of 4 patents. His work focuses on developing novel compounds that have practical applications in various industries.

Latest Patents

Nagahama's latest patents include innovative compounds such as diazaphenalene derivatives and resin containing color compositions. These compounds are characterized by a diazaphenalene skeleton that exhibits orange to reddish violet colors, depending on the substituents used. They demonstrate excellent thermal stability, weatherability, and good dispersibility in polymeric materials, making them valuable as pigments for coloring plastics. Another significant patent involves 8-benzimido substituted quinaphthalone derivatives, which can be produced through a specific chemical reaction. These compounds are useful as yellow organic pigments, expanding the palette available for various applications.

Career Highlights

Shizuo Nagahama is associated with Teijin Limited, a company known for its advancements in materials and chemicals. His work at Teijin has allowed him to explore and develop innovative solutions in the field of organic pigments.

Collaborations

Nagahama has collaborated with notable coworkers such as Keizo Shimada and Toshiaki Harada. Their combined expertise has contributed to the successful development of new compounds and technologies.

Conclusion

Shizuo Nagahama's contributions to the field of organic pigments through his innovative patents highlight his role as a significant inventor. His work continues to influence the industry, providing valuable materials for various applications.

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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