For the Inventor, By the Inventor

Enter assignee name

Kureha Corporation

USPTO Granted Patents = 336

% Expired Patents = 44.9

CIPO Patents = 15

EPO Patents = 165

Trademarks = 32

Forward Citations = 1,496

Loading Chart...

Loading Chart...

379 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 141 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. Yoshinori Suzuki (14 out of 160 patents)

13. Taiji Miyake (12 out of 12 patents)

14. Toru Yamazaki (12 out of 49 patents)

15. Akihiro Konno (11 out of 16 patents)

Core Competencies:

Polyarylene Sulfide

Non-Aqueous Electrolyte Battery

Downhole Tools

Binder Composition

Molded Article

Vinylidene Fluoride

Electrode Mixture

Production Method

Degradable Materials

Aromatic Polymers

Compound Production

Cyclic Polysilane

336 patents: Sort by Forward Citations

1. 12757638 - Piezoelectric film, touch panel, and piezoelectric film manufacturing method (2026-10-06),

2. 12744218 - Vinylidene fluoride copolymer composition and method for producing same, polymer dispersion solution, electrode for nonaqueous electrolyte secondary battery, electrolyte layer for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery (2026-09-22),

3. 12734279 - Bioabsorbable medical material (2026-09-15),

4. 12723154 - Downhole tool or member thereof containing polyglycolic acid (2026-09-01),

5. 12712186 - VINYLIDENE FLUORIDE COPOLYMER COMPOSITION AND METHOD FOR PRODUCING SAME, POLYMER DISPERSION SOLUTION, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ELECTROLYTE LAYER FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY (2026-08-18),

6. 12666876 - Transparent conductive piezoelectric film and touch panel (2026-06-23),

7. 12584370 - Molded product and processed article (2026-03-24),

8. 12552901 - Polyarylene sulfide production method (2026-02-17),

9. 12509555 - Method for producing polyarylene sulfide (2025-12-30),

10. 12482803 - Production method for electrode member (2025-11-25),

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

12. 12428387 - Method for producing compound (2025-09-30),

13. 12345118 - Downhole plug device, tube affixing method, and tube inspection method (2025-07-01),

14. 12207654 - Bactericidal agent for agricultural or horticultural use, plant disease control method, and product for plant disease control use (2025-01-28),

15. 12110758 - Downhole tool securing device and frac plug (2024-10-08),

Company Overview

Kureha Corporation, headquartered in Tokyo, Japan, specializes in the production of polyarylene sulfide, a high-performance thermoplastic known for its chemical resistance and thermal stability. The company is engaged in advanced research and development across various technology domains, including non-aqueous electrolyte batteries, downhole tools, and binder compositions. Kureha's innovative approaches extend to molded articles and electrode mixtures, positioning it as a key player in materials science and engineering.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

336 Patents

#254 in Tokyo

#498 in Japan

#2,693 in the World

Kureha Corporation

Forward Citations = 1,496

379 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Kureha Corporation. Retrieved from https://idiyas.com/company/kureha

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]

Loading…