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Sekisui Plastics Co., Ltd.

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USPTO Granted Patents = 107

% Expired Patents = 13.1

CIPO Patents = 1

EPO Patents = 84

Trademarks = 2

Forward Citations = 291

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144 inventors (with patents filed for the assignee):

Ryosuke Harada (11 out of 14 patents)

Hideyasu Matsumura (11 out of 11 patents)

Yasutaka Tsutsui (9 out of 9 patents)

4. Akiyoshi Kusaka (8 out of 9 patents)

5. Takaaki Hatori (6 out of 6 patents)

6. Haruhiko Matsuura (6 out of 6 patents)

7. Yushi Sakakibara (6 out of 6 patents)

8. Masahiko Ozawa (6 out of 6 patents)

9. Takahiko Fujita (5 out of 6 patents)

10. Kazuhiro Yoshikawa (5 out of 59 patents)

11. Kaori Kuwagaki (5 out of 5 patents)

12. Yusuke Kuwabara (5 out of 5 patents)

13. Shuichi Sasahara (5 out of 6 patents)

14. Shinji Ishida (5 out of 37 patents)

15. Shinji Takakura (5 out of 5 patents)

Core Competencies:

Molded Foam

Resin Composition

Foam Particles

Hydrogel

Composite Structures

Thermoplastic Elastomer

Porous Resin

Vehicle Seat Components

Expandable Particles

Adhesive Hydrogel

Polymeric Hydrogel

Nanoparticles

107 patents: Sort by Forward Citations

1. 12358191 - Method for manufacturing molded foam, and molded foam (2025-07-15),

2. 12286521 - Resin composition for production of foam particles, foam particles, foam molded body and composite structure member (2025-04-29),

3. 12221521 - Plant-derived polyamide-based elastomer foam molded body, method for manufacturing same, and foam particles thereof (2025-02-11),

4. 12065548 - Generally spherical resin particles formed of thermoplastic resin, method for producing same and use of same (2024-08-20),

5. 11958922 - Vinyl-based resin particles and method for producing same (2024-04-16),

6. 11806414 - Silica-including microcapsule resin particles, method for producing same, and application thereof (2023-11-07),

7. 11696975 - Hydrogel (2023-07-11),

8. 11647933 - Biological information detection device (2023-05-16),

9. 11643538 - Thermoplastic elastomer composition, foam particle, and foam molded body (2023-05-09),

10. 11548995 - Porous resin microparticles and manufacturing method for same (2023-01-10),

11. 11499018 - Hydrogel, use thereof, and production method therefor (2022-11-15),

12. 11484238 - Gel sheet (2022-11-01),

13. 11375952 - Adhesive hydrogel and medical electrode using the same (2022-07-05),

14. 11369935 - Hollow particles and use thereof (2022-06-28),

15. 11220585 - Hollow particles and use of same (2022-01-11),

Company Overview

Sekisui Plastics Co., Ltd., based in Osaka, Japan, specializes in advanced foam technology, focusing on the development and manufacturing of molded foam products. The company is recognized for its expertise in resin composition, foam particles, and hydrogel applications, catering to various industries including automotive. Their innovative solutions encompass composite structures and thermoplastic elastomers, with a significant emphasis on producing high-performance porous resins and vehicle seat components, enhancing comfort and functionality in modern transportation.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

107 Patents

#119 in Osaka

#1,078 in Japan

#7,345 in the World

Sekisui Plastics Co., Ltd.

Forward Citations = 291

144 inventors:

Ryosuke Harada (11 out of 14 patents)

Hideyasu Matsumura (11 out of 11 patents)

Yasutaka Tsutsui (9 out of 9 patents)

4. Akiyoshi Kusaka (8 out of 9 patents)

5. Takaaki Hatori (6 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sekisui Plastics Co., Ltd.. Retrieved from https://idiyas.com/company/sekisui-plastics-company

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

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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