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Japan Polypropylene Corporation

USPTO Granted Patents = 54

% Expired Patents = 13.0

EPO Patents = 48

Trademarks = 5

Forward Citations = 163

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95 inventors (with patents filed for the assignee):

Hideshi Uchino (8 out of 19 patents)

Kuninori Takahashi (8 out of 9 patents)

Shinichi Kitade (8 out of 8 patents)

4. Iku Kouzai (7 out of 7 patents)

5. Takao Tayano (6 out of 15 patents)

6. Shigeo Mizukami (6 out of 8 patents)

7. Masahiro Uematsu (5 out of 7 patents)

8. Akio Tanna (5 out of 9 patents)

9. Kazuo Asuka (5 out of 5 patents)

10. Masato Nakano (5 out of 5 patents)

11. Naoshi Iwama (5 out of 11 patents)

12. Minoru Kobayashi (4 out of 8 patents)

13. Tetsuya Morioka (4 out of 4 patents)

14. Naomasa Sato (4 out of 9 patents)

15. Masami Kashimoto (4 out of 8 patents)

Core Competencies:

Olefin Polymerization

Polypropylene Resin

Catalyst Production

Polymer Composition

Ionomer

Block Copolymer

Thermal Molding

Decorative Film

Multilayer Sheet

Heat Treatment

Thermoplastic Resin

Laminated Film

54 patents: Sort by Forward Citations

1. 12404353 - Olefin polymerization catalyst, olefin polymerization catalyst production method, and olefin polymer production method using the olefin polymerization catalyst (2025-09-02),

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. 12103987 - Method for producing catalyst component for olefin polymerization, method for producing catalyst for olefin polymerization, and method for producing olefin polymer (2024-10-01),

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

7. 11511529 - Decorative film and method for producing decorative molded body using same (2022-11-29),

8. 11168166 - Multi-component polar olefin copolymer and method for producing the same (2021-11-09),

9. 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),

10. 10975182 - Polar group-containing olefin copolymer, multinary polar olefin copolymer, olefin resin composition, and adhesive material, laminate, and other application products using same (2021-04-13),

11. 10947373 - Polypropylene resin composition for microporous film and use of polypropylene resin composition (2021-03-16),

12. 10717855 - Production method of ethylene-based ionomer and ethylene-based ionomer (2020-07-21),

13. 10550211 - Process for producing ethylene/unsaturated carboxylic acid copolymer, and said copolymer (2020-02-04),

14. 10526427 - Method for producing solid catalyst component for α-olefin polymerization and method for producing α-olefin polymer using the same (2020-01-07),

15. 10464251 - Thermal molding sheet and molded article (2019-11-05),

Company Overview

Japan Polypropylene Corporation, based in Tokyo, specializes in the development and production of advanced olefin polymerization technologies. The company focuses on creating high-performance polypropylene resins and catalysts, catering to diverse applications in various industries. Its expertise extends to polymer composition, ionomers, and block copolymers, enabling innovative solutions in thermal molding and decorative films. With a commitment to quality and innovation, Japan Polypropylene Corporation plays a significant role in the global polymer market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

54 Patents

#763 in Tokyo

#1,629 in Japan

#13,126 in the World

Japan Polypropylene Corporation

Forward Citations = 163

95 inventors:

Hideshi Uchino (8 out of 19 patents)

Kuninori Takahashi (8 out of 9 patents)

Shinichi Kitade (8 out of 8 patents)

4. Iku Kouzai (7 out of 7 patents)

5. Takao Tayano (6 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Japan Polypropylene Corporation. Retrieved from https://idiyas.com/company/japan-polypropylene

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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