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Nippon Steel & Sumikin Chemical Co., Ltd.

USPTO Granted Patents = 88

CIPO Patents = 15

EPO Patents = 64

Trademarks = 4

Forward Citations = 416

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233 inventors (with patents filed for the assignee):

Takahiro Kai (28 out of 47 patents)

Toshihiro Yamamoto (20 out of 35 patents)

Masaki Komori (15 out of 23 patents)

4. Megumi Matsumoto (13 out of 14 patents)

5. Hiroyuki Hayashida (12 out of 16 patents)

6. Kazuaki Yoshimura (11 out of 13 patents)

7. Tohru Asari (9 out of 12 patents)

8. Kazuto Shiraishi (8 out of 9 patents)

9. Junya Ogawa (6 out of 22 patents)

10. Masashi Tada (6 out of 26 patents)

11. Hiroshige Tanaka (6 out of 6 patents)

12. Hiroshi Miyazaki (5 out of 21 patents)

13. Masashi Niina (5 out of 5 patents)

14. Atsushi Kawada (5 out of 8 patents)

15. Masakazu Katayama (5 out of 5 patents)

Core Competencies:

Organic Electroluminescent Elements

Solid Polymer Fuel Cells

Polyimide Films

Organic Semiconductor Materials

Lithium Secondary Batteries

Carbon Nanostructures

Organic Light Emitting Devices

Catalyst Materials

Display Devices

Curable Compositions

Aromatic Compounds

88 patents: Sort by Forward Citations

1. 10193069 - Polymer for use in organic electroluminescent element and organic electroluminescent element employing same (2019-01-29),

2. 10135074 - Carbon powder for catalyst, catalyst, electrode catalyst layer, membrane electrode assembly, and fuel cell using the carbon powder (2018-11-20),

3. 10103398 - Support carbon material and catalyst for solid polymer type fuel cell use (2018-10-16),

4. 10096837 - Supporting carbon material for solid polymer fuel cell and catalyst metal particle-supporting carbon material (2018-10-09),

5. 10077337 - Polyimide, resin film, and metal-clad laminate (2018-09-18),

6. 10032993 - Aromatic heterocyclic compound, manufacturing method thereof, organic semiconductor material, and organic semiconductor device (2018-07-24),

7. 10003085 - Carbon support material for solid polymer type fuel cell use and metal catalyst particle- supporting carbon material and methods of production of same (2018-06-19),

8. 9985219 - Organic electroluminescent element (2018-05-29),

9. 9978963 - Material for organic electroluminescent elements, and organic electroluminescent element using same (2018-05-22),

10. 9966610 - Electrode for fuel cell and method for manufacturing same (2018-05-08),

11. 9957260 - Organic metal complex, light emitting material, delayed fluorescent material, and organic light emitting device (2018-05-01),

12. 9947934 - Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst (2018-04-17),

13. 9868823 - Display device, method for manufacturing same, polyimide film for display device supporting bases, and method for producing polyimide film for display device supporting bases (2018-01-16),

14. 9865829 - Organic electroluminescent element material and organic electroluminescent element using same (2018-01-09),

15. 9806342 - Negative electrode active material of lithium secondary battery, negative electrode of lithium secondary battery, lithium secondary battery for vehicle installation using the negative electrode active material and negative electrode, and method for manufacturing the negative electrode active material (2017-10-31),

NIPPON STEEL & SUMIKIN CHEMICAL CO., LTD. is a leading global company in the chemical industry, specialized in the manufacturing of various chemicals and materials. With a strong commitment to innovation and quality, they provide high-performance products and solutions for a wide range of industries, including automotive, electronics, construction, and more. Their diverse product portfolio includes specialty chemicals, functional materials, carbon materials, and advanced technologies. By leveraging their extensive expertise and global network, they aim to contribute to creating a sustainable and prosperous society.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

88 Patents

#519 in Tokyo

#1,191 in Japan

#8,401 in the World

Nippon Steel & Sumikin Chemical Co., Ltd.

Forward Citations = 416

233 inventors:

Takahiro Kai (28 out of 47 patents)

Toshihiro Yamamoto (20 out of 35 patents)

Masaki Komori (15 out of 23 patents)

4. Megumi Matsumoto (13 out of 14 patents)

5. Hiroyuki Hayashida (12 out of 16 patents)

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