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Idemitsu Kosan., Ltd.

USPTO Granted Patents = 85

% Expired Patents = 1.2

CIPO Patents = 9

EPO Patents = 6

Forward Citations = 72

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165 inventors (with patents filed for the assignee):

Kazuki Nishimura (12 out of 120 patents)

Satomi Tasaki (11 out of 51 patents)

Masatoshi Saito (8 out of 36 patents)

4. Yuki Nakano (6 out of 73 patents)

5. Yuki Nakano (6 out of 35 patents)

6. Hiroaki Itoi (5 out of 17 patents)

7. Natalia Chebotareva (5 out of 25 patents)

8. Michelle Groarke (5 out of 5 patents)

9. Tasuku Haketa (5 out of 5 patents)

10. Hiroaki Toyoshima (4 out of 11 patents)

11. Kei Yoshida (4 out of 59 patents)

12. Mikio Hamano (4 out of 5 patents)

13. Kyohei Horiguchi (4 out of 4 patents)

14. Masato Nakamura (3 out of 108 patents)

15. Ryoji Maeda (3 out of 10 patents)

Core Competencies:

Organic Electroluminescent Element

Electronic Device

Photoelectric Conversion Element

Corrosion Inhibitor

Lithium-Ion Battery

Lubricant Composition

Thermosetting Composition

Sulfide Solid Electrolyte

Polycarbonate Resin

Color Conversion Particle

Grease Composition

Aromatic Polyether

85 patents: Sort by Forward Citations

1. 12757633 - Organic electroluminescence device and electronic apparatus (2026-10-06),

2. 12757568 - Organic electroluminescence device, light emitting device, organic electroluminescence display device and electronic device (2026-10-06),

3. 12757446 - Semiconductor device (2026-10-06),

4. 12753341 - Organic electroluminescent element and electronic device (2026-10-06),

5. 12753145 - Aromatic amine derivative, and organic electroluminescent element using same (2026-10-06),

6. 12751204 - Compound, material for organic electroluminescent element, organic electroluminescent element and electronic device (2026-09-29),

7. 12738499 - Modified sulfide solid electrolyte and production method for same, and electrode combined material and lithium-ion battery (2026-09-15),

8. 12735633 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2026-09-15),

9. 12735393 - Compound, corrosion inhibitor, and lubricant composition (2026-09-15),

10. 12733399 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2026-09-08),

11. 12701914 - Organic electroluminescence device comprising an azine compound and a rare earth metal, rare earth metal compound, and/or rare earth metal complex and an electronic equipment comprising said organic electroluminescence device (2026-08-04),

12. 12696639 - Display device (2026-07-28),

13. 12695116 - Production method for solid electrolyte and electrolyte precursor (2026-07-28),

14. 12692456 - Lubricant composition (2026-07-28),

15. 12692435 - Organic electroluminescent element, compound, and electronic equipment (2026-07-28),

Idemitsu Kosan, Ltd., headquartered in Tokyo, Japan, is a prominent player in the field of organic electroluminescence. The company specializes in the development and manufacturing of advanced materials and technologies, including organic electroluminescent elements and electronic devices. Idemitsu's expertise extends to photoelectric conversion elements, lithium-ion batteries, and corrosion inhibitors, positioning it as a key innovator in energy and materials science. The organization is committed to enhancing performance across various applications, including lubricants and thermosetting compositions.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

85 Patents

#603 in Tokyo

#1,253 in Japan

#8,951 in the World

Idemitsu Kosan., Ltd.

Forward Citations = 72

165 inventors:

Kazuki Nishimura (12 out of 120 patents)

Satomi Tasaki (11 out of 51 patents)

Masatoshi Saito (8 out of 36 patents)

4. Yuki Nakano (6 out of 73 patents)

5. Yuki Nakano (6 out of 35 patents)

Please report any incorrect information to [email protected]

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