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Mitsui Mining Co., Ltd.

USPTO Granted Patents = 44

Forward Citations = 458

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91 inventors (with patents filed for the assignee):

Kenji Fukuda (8 out of 11 patents)

Tatsuo Umeno (5 out of 9 patents)

Tadanori Tsunawaki (5 out of 7 patents)

4. Youichiro Hara (5 out of 6 patents)

5. Kazuhiko Hanashita (4 out of 4 patents)

6. Yoshinori Yasumoto (3 out of 3 patents)

7. Osamu Matsunaga (3 out of 6 patents)

8. Kouji Sakawaki (3 out of 3 patents)

9. Koji Sakata (3 out of 3 patents)

10. Hidemi Tsutsumi (3 out of 3 patents)

11. Tsuyoshi Ishikawa (3 out of 5 patents)

12. Yoshiro Ito (3 out of 3 patents)

13. Keiichiro Koba (3 out of 3 patents)

14. Hisashi Murakami (2 out of 17 patents)

15. Kohei Murayama (2 out of 2 patents)

Core Competencies:

Graphite Particles

Lithium Secondary Battery

Anode Material

Cathode Active Material

Activated Coke

Desulfurization Process

Carbon Fiber-Reinforced Material

Single Crystal Production

High-Purity Alumina

Machinable Ceramics

Coal-Water Mixture

Nitrogen Oxides Removal

44 patents: Sort by Forward Citations

1. 6939526 - Graphite particles and process for production thereof (2005-09-06),

2. 6884545 - Anode material for lithium secondary battery, process for production thereof, and lithium secondary battery (2005-04-26),

3. 6770399 - Composite material for anode of lithium secondary battery, and lithium secondary battery (2004-08-03),

4. 6432583 - Anode material for lithium secondary battery, process for production thereof, and lithium secondary battery (2002-08-13),

5. 6383686 - Anode material for lithium secondary battery, lithium secondary battery using said anode material, and method for charging of said secondary battery (2002-05-07),

6. 6004526 - Process for preparing cathode active material for lithium secondary (1999-12-21),

7. 5840651 - Process for the production of activated coke for simultaneous (1998-11-24),

8. 5791569 - Crushing apparatus (1998-08-11),

9. 5696049 - Catalyst for the decomposition of nitrogen oxides and a method for (1997-12-09),

10. 5587136 - Dry process desulfurization and denitrifcation process (1996-12-24),

11. 5577675 - Agitating pulverizer (1996-11-26),

12. 5525196 - Process for producing formed activated coke (1996-06-11),

13. 5392738 - Steam generator for a steam bath (1995-02-28),

14. 5333573 - Steam generator for a steam bath (1994-08-02),

15. 5330680 - Foliated fine graphite particles and method for preparing same (1994-07-19),

Mitsui Mining Co., Ltd. is a global metal mining and smelting company based in Tokyo, Japan. With a rich history of over 100 years, Mitsui Mining specializes in the exploration, development, and production of various metals, including copper, zinc, lead, and gold. The company also engages in the manufacturing and sales of related products and provides recycling services for various metals. Mitsui Mining is committed to sustainable mining practices, ensuring the responsible use of natural resources while contributing to the development of society and the advancement of technology.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

44 Patents

#758 in Tokyo

#1,826 in Japan

#15,286 in the World

Mitsui Mining Co., Ltd.

Forward Citations = 458

91 inventors:

Kenji Fukuda (8 out of 11 patents)

Tatsuo Umeno (5 out of 9 patents)

Tadanori Tsunawaki (5 out of 7 patents)

4. Youichiro Hara (5 out of 6 patents)

5. Kazuhiko Hanashita (4 out of 4 patents)

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