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Idemitsu Kosan., Ltd.

USPTO Granted Patents = 79

% Expired Patents = 1.3

CIPO Patents = 9

EPO Patents = 6

Forward Citations = 72

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160 inventors (with patents filed for the assignee):

Satomi Tasaki (11 out of 51 patents)

Kazuki Nishimura (9 out of 9 patents)

Masatoshi Saito (7 out of 35 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. Mikio Hamano (4 out of 5 patents)

10. Kyohei Horiguchi (4 out of 4 patents)

11. Tasuku Haketa (4 out of 4 patents)

12. Ryoji Maeda (3 out of 10 patents)

13. Sayaka Mizutani (3 out of 26 patents)

14. Hiroaki Toyoshima (3 out of 10 patents)

15. Heinz Wolleb (3 out of 55 patents)

79 patents: Sort by Forward Citations

1. 12738499 - Modified sulfide solid electrolyte and production method for same, and electrode combined material and lithium-ion battery (2026-09-15),

2. 12735633 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2026-09-15),

3. 12735393 - Compound, corrosion inhibitor, and lubricant composition (2026-09-15),

4. 12733399 - Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device (2026-09-08),

5. 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),

6. 12696639 - Display device (2026-07-28),

7. 12695116 - Production method for solid electrolyte and electrolyte precursor (2026-07-28),

8. 12692456 - Lubricant composition (2026-07-28),

9. 12692435 - Organic electroluminescent element, compound, and electronic equipment (2026-07-28),

10. 12692212 - Compound, organic electroluminescent element and electronic device (2026-07-28),

11. 12690290 - Photoelectric conversion element, method for manufacturing photoelectric conversion element, solar cell module, and paddle (2026-07-21),

12. 12686833 - Refrigerator oil composition and refrigerator mixture composition (2026-07-21),

13. 12683290 - Radio wave absorber, radio wave absorption structure including radio wave absorber, and composition for radio wave absorber (2026-07-14),

14. 12680045 - Pressure medium and method for using pressure medium (2026-07-14),

15. 12679826 - Compound, material for organic electroluminescence device, organic electroluminescence device, and electronic apparatus (2026-07-14),

Idemitsu Kosan Co., Ltd. is a Japanese petroleum company that specializes in the production and sale of petroleum products, lubricants, and petrochemicals. The company also operates in renewable energy, exploration, and production of oil and gas. Founded in 1911, Idemitsu Kosan has a global presence and a strong commitment to sustainability and innovation.

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

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USPTO Data Jan 1 1976 - Sep 15 2026

79 Patents

#629 in Tokyo

#1,312 in Japan

#9,549 in the World

Idemitsu Kosan., Ltd.

Forward Citations = 72

160 inventors:

Satomi Tasaki (11 out of 51 patents)

Kazuki Nishimura (9 out of 9 patents)

Masatoshi Saito (7 out of 35 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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