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Japan Polyethylene Corporation

USPTO Granted Patents = 48

% Expired Patents = 4.2

EPO Patents = 40

Trademarks = 2

Forward Citations = 71

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76 inventors (with patents filed for the assignee):

Yoshiyuki Ishihama (10 out of 16 patents)

Tsutomu Sakuragi (9 out of 9 patents)

Minoru Kobayashi (8 out of 8 patents)

4. Masahiro Uematsu (7 out of 7 patents)

5. Masaru Aoki (7 out of 10 patents)

6. Yoshikuni Okumura (6 out of 23 patents)

7. Junichi Kuroda (6 out of 11 patents)

8. Kyoko Nozaki (5 out of 16 patents)

9. Shinya Hayashi (5 out of 5 patents)

10. Tetsurou Fukuda (5 out of 5 patents)

11. Hiroyuki Shimizu (5 out of 71 patents)

12. Shingo Ito (4 out of 45 patents)

13. Yuichiro Yasukawa (4 out of 7 patents)

14. Akio Tanna (4 out of 9 patents)

15. Kazunari Abe (4 out of 4 patents)

Core Competencies:

Polymer Composition

Ionomer

Olefin Copolymer

Gas-Barrier Resin

Metallocene Compound

Ethylene-Based Polymer

Adhesive Material

Solar Cell Encapsulant

Injection Molding

Electroconductive Resin

Catalyst Development

Multi-Component Copolymer

48 patents: Sort by Forward Citations

1. 12534653 - Polymer composition for lamination and laminated body using same (2026-01-27),

2. 12234358 - Polyamide resin composition comprising specific ionomer (2025-02-25),

3. 12152094 - Multi-component ionomer (2024-11-26),

4. 12116474 - Polar group-containing olefin copolymer (2024-10-15),

5. 11981765 - Catalyst for olefin polymerization and method for producing polar group—containing olefin polymer (2024-05-14),

6. 11739171 - Method for producing α-olefin/(meth)acrylic acid ester copolymer (2023-08-29),

7. 11697698 - Method for producing copolymer of allyl monomer having polar group (2023-07-11),

8. 11655360 - Gas-barrier resin composition and use thereof (2023-05-23),

9. 11643485 - Ethylene-based polymer, polyethylene-based resin composition and use thereof, catalyst component for olefin polymerization, olefin polymerization catalyst containing the component, and method for producing ethylene-based polymer by using the catalyst (2023-05-09),

10. 11597827 - Resin composition, pellet, composite molded article, method for manufacturing composite molded article and tank (2023-03-07),

11. 11485808 - Metallocene compound, catalyst component for olefin polymerization and catalyst for olefin polymerization containing the same, and method for producing olefin polymer using catalyst for olefin polymerization (2022-11-01),

12. 11352453 - Catalyst for olefin polymerization and production method for polar group-containing olefin-based polymers (2022-06-07),

13. 11248074 - Method for producing copolymer of polar group-containing allyl monomer (2022-02-15),

14. 11168166 - Multi-component polar olefin copolymer and method for producing the same (2021-11-09),

15. 11084957 - Polar-group-containing olefin copolymer, polar-group-containing multinary olefin copolymer, olefin-based resin composition, and adhesive and layered product each using the same (2021-08-10),

Japan Polyethylene Corporation, based in Tokyo, specializes in the development and manufacturing of advanced polymer materials. The company focuses on innovative technologies in polyamide resin compositions, ionomers, and olefin copolymers, catering to diverse industrial applications. Their expertise extends to catalysts for olefin polymerization and ethylene-based polymers, including metallocene compounds. Additionally, they produce gas-barrier resin compositions and solar cell encapsulants, contributing to advancements in materials science and sustainable energy solutions.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

48 Patents

#814 in Tokyo

#1,754 in Japan

#14,527 in the World

Japan Polyethylene Corporation

Forward Citations = 71

76 inventors:

Yoshiyuki Ishihama (10 out of 16 patents)

Tsutomu Sakuragi (9 out of 9 patents)

Minoru Kobayashi (8 out of 8 patents)

4. Masahiro Uematsu (7 out of 7 patents)

5. Masaru Aoki (7 out of 10 patents)

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