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For the Inventor, By the Inventor

Tokyo, Japan

Shoei Chemical Inc.


USPTO Granted Patents = 109



Trademarks = 11

Forward Citations = 282

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130 inventors (with patents filed for the assignee):

goldMedal Yuji Akimoto (24 out of 28 patents)

silverMedal Kazuro Nagashima (19 out of 20 patents)

bronzeMedal Hirokazu Sasaki (15 out of 31 patents)

4.  Eiichi Asada (14 out of 15 patents)

5.  Takafumi Moriyama (12 out of 12 patents)

6.  Naoto Shindo (10 out of 11 patents)

7.  Ruiqing Ma (9 out of 119 patents)

8.  Makoto Kido (9 out of 9 patents)

9.  Hiroshi Mashima (9 out of 15 patents)

10.  Masayuki Maekawa (8 out of 8 patents)

11.  Hidenori Ieda (8 out of 8 patents)

12.  Tadashi Kanasaku (7 out of 7 patents)

13.  Yuko Mitsuka (6 out of 6 patents)

14.  Christian Justus Ippen (6 out of 27 patents)

15.  Kousuke Nishimura (6 out of 6 patents)


Core Competencies:
Quantum Dot Material
Semiconductor Nanoparticles
Conductive Paste
Electroluminescent Devices
Nanostructure Ink Compositions
Core/Shell Semiconductor Nanoparticles
Silver Paste
Dielectric Ceramic Composition
Quantum Yield Improvement
Nanocrystal Production
Flexible Electroluminescent Devices
Wavelength Conversion Layer

109 patents:

1. 12495663 - Flexible electroluminescent devices (2025-12-09),
2. 12454646 - Quantum dot material and method for producing quantum dot material (2025-10-28),
3. 12415954 - Method of producing core/shell semiconductor nanoparticles (2025-09-16),
4. 12415948 - Semiconductor nanoparticle complex dispersion liquid, semiconductor nanoparticle complex, semiconductor nanoparticle complex composition and semiconductor nanoparticle complex cured membrane (2025-09-16),
5. 12384925 - Polymer-type conductive paste, conductive film, and solid electrolytic capacitor element (2025-08-12),
6. 12365836 - Semiconductor nanoparticle complex, semiconductor nanoparticle complex dispersion liquid, semiconductor nanoparticle complex composition, and semiconductor nanoparticle complex cured film (2025-07-22),
7. 12359123 - Semiconductor nanoparticle complex, semiconductor nanoparticle complex dispersion liquid, semiconductor nanoparticle complex composition, semiconductor nanoparticle complex cured film, and purification method for semiconductor nanoparticle complex (2025-07-15),
8. 12356772 - Method of improving performance of devices with QDs comprising thin metal oxide coatings (2025-07-08),
9. 12340919 - Silver paste (2025-06-24),
10. 12331238 - Semiconductor nanoparticle aggregate, semiconductor nanoparticle aggregate dispersion liquid, semiconductor nanoparticle aggregate composition, and semiconductor nanoparticle aggregate cured film (2025-06-17),
11. 12297521 - Method for producing particles and particle production apparatus (2025-05-13),
12. 12258506 - Films comprising bright silver based quaternary nanostructures (2025-03-25),
13. 12205731 - Conductive resin composition (2025-01-21),
14. 12166159 - Semiconductor nanoparticle aggregate, semiconductor nanoparticle aggregate dispersion liquid, semiconductor nanoparticle aggregate composition, and semiconductor nanoparticle aggregate cured film (2024-12-10),
15. 12163079 - Synthesis of blue-emitting ZnSeTealloy nanocrystals with low full width at half-maximum (2024-12-10),
SHOEI CHEMICAL INC. is a global chemical manufacturing company specializing in the production of industrial chemicals and materials. With over 50 years of experience, we offer a wide range of high-quality products for various industries including automotive, electronics, construction, and more. Our commitment to research and development allows us to constantly innovate and provide sustainable solutions for our customers. Visit our website to learn more about our extensive product portfolio and how we can meet your chemical needs.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

109 Patents

#452 in Tokyo

#1,040 in Japan

#7,016 in the World

...
Tokyo, Japan

Shoei Chemical Inc.

Forward Citations = 282

130 inventors:

goldMedal Yuji Akimoto (24 out of 28 patents)

silverMedal Kazuro Nagashima (19 out of 20 patents)

bronzeMedal Hirokazu Sasaki (15 out of 31 patents)

4.  Eiichi Asada (14 out of 15 patents)

5.  Takafumi Moriyama (12 out of 12 patents)

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