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Tokai Carbon Company, Ltd.

USPTO Granted Patents = 73

EPO Patents = 32

Trademarks = 4

Forward Citations = 330

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108 inventors (with patents filed for the assignee):

Shinji Misono (8 out of 8 patents)

Kiyonari Nakai (7 out of 7 patents)

Fumio Takemura (5 out of 5 patents)

4. Shigehiro Tanaka (4 out of 4 patents)

5. Makoto Sekiyama (4 out of 4 patents)

6. Toshio Nakada (4 out of 4 patents)

7. Hitoshi Ue (4 out of 4 patents)

8. Tomoaki Kirino (3 out of 5 patents)

9. Akihiro Kuroyanagi (3 out of 3 patents)

10. Takaomi Sugihara (3 out of 3 patents)

11. Asami Takenaka (3 out of 3 patents)

12. Yukari Ishibashi (3 out of 3 patents)

13. Tomonori Tahara (3 out of 3 patents)

14. Tohru Kida (3 out of 4 patents)

15. Masahiko Mito (3 out of 3 patents)

Core Competencies:

Polycrystalline SiC

Carbon Black Production

Lithium-Ion Batteries

Sintered Metal Friction Material

Semiconductor Processing

Polyurethane Resin Pigments

Fuel Cell Separators

Graphite Powder Manufacturing

Surface-Treated Carbon Black

Non-Aqueous Secondary Cells

Silicon Carbide Fabrication

Carbon Nanoballoons

73 patents: Sort by Forward Citations

1. 12368026 - Polycrystalline SiC compact and method for manufacturing the same (2025-07-22),

2. 12065572 - Carbon black, method for producing carbon black, and rubber composition (2024-08-20),

3. 11981790 - Carbon black and method for producing carbon black (2024-05-14),

4. 11646406 - Negative electrode material for lithium-ion secondary battery and method for producing negative electrode material for lithium-ion secondary battery (2023-05-09),

5. 11644076 - Sintered metal friction material (2023-05-09),

6. 11203691 - Carbon black, method for producing carbon black, and rubber composition (2021-12-21),

7. 10927262 - Method for producing oxidized carbon black aqueous dispersion, and method for producing oxidized carbon black aqueous dispersion for inkjet ink (2021-02-23),

8. 10308511 - Process for manufacturing graphite powder for lithium secondary battery negative electrode material (2019-06-04),

9. 9975779 - SiC formed body and method for producing SiC formed body (2018-05-22),

10. 9914835 - Carbon black, method for producing carbon black, and rubber composition (2018-03-13),

11. 9490157 - Semiconductor processing (2016-11-08),

12. 9145482 - Carbon black, method for producing carbon black, and rubber composition (2015-09-29),

13. 9102840 - Polyurethane resin addition pigment, process for producing polyurethane resin addition pigment, pigment dispersion composition, and jet printing ink composition (2015-08-11),

14. 9045583 - Polyurethane resin adhesion pigment, pigment dispersion composition and inkjet ink composition (2015-06-02),

15. 9018317 - Process for producing pigment dispersion composition (2015-04-28),

Tokai Carbon is a Japanese carbon products manufacturing company. With over a century of experience, they specialize in producing carbon-related products such as graphite electrodes, carbon black, fine carbon, and specialty carbon products. Their products are used in various industries including steel, automotive, chemicals, and electronics.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

73 Patents

#571 in Tokyo

#1,341 in Japan

#9,949 in the World

Tokai Carbon Company, Ltd.

Forward Citations = 330

108 inventors:

Shinji Misono (8 out of 8 patents)

Kiyonari Nakai (7 out of 7 patents)

Fumio Takemura (5 out of 5 patents)

4. Shigehiro Tanaka (4 out of 4 patents)

5. Makoto Sekiyama (4 out of 4 patents)

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