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Kureha Corporation

USPTO Granted Patents = 328

CIPO Patents = 21

EPO Patents = 161

Trademarks = 37

Forward Citations = 1,455

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360 inventors (with patents filed for the assignee):

Naohiro Sonobe (27 out of 42 patents)

Hiroyuki Sato (26 out of 40 patents)

Hiroshi Sakabe (24 out of 24 patents)

4. Michihisa Miyahara (24 out of 26 patents)

5. Hiroyuki Sato (24 out of 82 patents)

6. Takeo Takahashi (23 out of 51 patents)

7. Kazuyuki Yamane (20 out of 25 patents)

8. Kenji Suzuki (19 out of 134 patents)

9. Fuminori Kobayashi (19 out of 19 patents)

10. Masayuki Okura (17 out of 19 patents)

11. Yasuhiro Tada (15 out of 22 patents)

12. Taiji Miyake (12 out of 12 patents)

13. Toru Yamazaki (12 out of 49 patents)

14. Yoshinori Suzuki (12 out of 157 patents)

15. Akihiro Konno (11 out of 16 patents)

Core Competencies:

Electrode Member

Downhole Tool

Vinylidene Fluoride Polymer

Bactericidal Agent

Piezoelectric Body Film

Polyarylene Sulfide

Non-Aqueous Electrolyte Battery

Continuous Production Method

Resin Composition

Degradable Downhole Plug

Binder Composition

Heat-Shrinkable Multilayer Film

328 patents: Sort by Forward Citations

1. 12509555 - Method for producing polyarylene sulfide (2025-12-30),

2. 12482803 - Production method for electrode member (2025-11-25),

3. 12460505 - Frac plug and method for manufacturing same, and method for sealing borehole (2025-11-04),

4. 12428387 - Method for producing compound (2025-09-30),

5. 12345118 - Downhole plug device, tube affixing method, and tube inspection method (2025-07-01),

6. 12207654 - Bactericidal agent for agricultural or horticultural use, plant disease control method, and product for plant disease control use (2025-01-28),

7. 12110758 - Downhole tool securing device and frac plug (2024-10-08),

8. 12065902 - Frac plug and method for manufacturing same, and method for sealing borehole (2024-08-20),

9. 12060446 - Resin composition, method for producing resin composition, molded article, and method for producing molded article (2024-08-13),

10. 12054605 - Vinylidene fluoride-based polymer composition obtained using non-fluorinated surfactant and production method therefor (2024-08-06),

11. 12044094 - Plug, downhole tool, and well treatment method (2024-07-23),

12. 12023618 - Filter reinforcing material and filter medium for deodorizing filter comprising same (2024-07-02),

13. 12004429 - Piezoelectric body film, piezoelectric body film production method, and piezoelectric body device (2024-06-04),

14. 12000232 - Plug, retaining member, and method for well completion using plug (2024-06-04),

15. 11963454 - Piezoelectric body film, piezoelectric body film production method, and piezoelectric body device (2024-04-16),

Kureha Corporation is a global chemical and materials company based in Tokyo, Japan. With over 60 years of history, Kureha is dedicated to creating innovative and sustainable solutions in a wide range of industries. Their products include specialty films, plastics, synthetic fibers, and pharmaceuticals. Kureha is committed to research and development, ensuring the highest quality standards and customer satisfaction.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

328 Patents

#226 in Tokyo

#489 in Japan

#2,670 in the World

Kureha Corporation

Forward Citations = 1,455

360 inventors:

Naohiro Sonobe (27 out of 42 patents)

Hiroyuki Sato (26 out of 40 patents)

Hiroshi Sakabe (24 out of 24 patents)

4. Michihisa Miyahara (24 out of 26 patents)

5. Hiroyuki Sato (24 out of 82 patents)

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