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For the Inventor, By the Inventor

Tokyo, Japan

Mitsui Coke Co. Ltd.

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USPTO Granted Patents = 13

Forward Citations = 105

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34 inventors (with patents filed for the assignee):

goldMedal Kenji Fukuda (5 out of 11 patents)

silverMedal Hisashi Murakami (4 out of 17 patents)

bronzeMedal Noriaki Ohnishi (4 out of 4 patents)

4.  Toshikatsu Ohtsubo (3 out of 3 patents)

5.  Tetsuo Wada (3 out of 3 patents)

6.  Shoichi Oi (3 out of 3 patents)

7.  Hidehiko Sugimura (2 out of 2 patents)

8.  Shinya Mori (2 out of 2 patents)

9.  Tadanobu Takata (2 out of 2 patents)

10.  Isao Kubo (2 out of 2 patents)

11.  Toshiaki Kobayashi (1 out of 27 patents)

12.  Tomio Nobe (1 out of 5 patents)

13.  Katsunobu Tatsumoto (1 out of 1 patent)

14.  Hiroshi Niimi (1 out of 1 patent)

15.  Keichiro Koba (1 out of 1 patent)


13 patents:

1. 4792389 - Process to produce light products and fuel oils for conventional use (1988-12-20),
2. 4443328 - Method for continuous thermal cracking of heavy petroleum oil (1984-04-17),
3. 4354919 - Process for the liquefaction of coal (1982-10-19),
4. 4344837 - Process for the dehydration and liquefaction of water-containing coal (1982-08-17),
5. 4320107 - Process for producing carbon fibers (1982-03-16),
6. 4309192 - Treatment of water-containing coal (1982-01-05),
7. 4246000 - Fuel compositions comprising coal-liquid fuel mixture (1981-01-20),
8. 4243488 - Coke compositions and process for manufacturing same (1981-01-06),
9. 4210517 - Preparation of carbonaceous products (1980-07-01),
10. 4202756 - Process for the production of solvent-refined coal useful as starting (1980-05-13),
11. 4117098 - Process for manufacturing a carbonaceous material (1978-09-26),
12. 4111786 - Process for liquefying coal (1978-09-05),
13. 4029749 - Process for manufacturing needle coke (1977-06-14),
Company Overview
Mitsui Coke Co. Ltd. is a prominent player in the production and supply of coke and related products, primarily serving the steel and chemical industries. The company specializes in the development of high-quality coke, which is essential for steel manufacturing, and engages in various research initiatives to enhance production efficiency and sustainability. Headquartered in Tokyo, Japan, Mitsui Coke is committed to innovation in materials science and environmental stewardship, contributing to advancements in industrial processes.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

13 Patents

#1,663 in Tokyo

#3,752 in Japan

#45,081 in the World

Tokyo, JP
Tokyo, Japan

Mitsui Coke Co. Ltd.

Forward Citations = 105

34 inventors:

goldMedal Kenji Fukuda (5 out of 11 patents)

silverMedal Hisashi Murakami (4 out of 17 patents)

bronzeMedal Noriaki Ohnishi (4 out of 4 patents)

4.  Toshikatsu Ohtsubo (3 out of 3 patents)

5.  Tetsuo Wada (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mitsui Coke Co. Ltd.. Retrieved from https://idiyas.com/company/mitsui-coke-company

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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