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Yokohama, Japan

Chiyoda Chemical Engineering Construction Co., Ltd.

USPTO Granted Patents = 62

Forward Citations = 1,225

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149 inventors (with patents filed for the assignee):

Yoshimi Shiroto (11 out of 24 patents)

Munekazu Nakamura (11 out of 14 patents)

Sachio Asaoka (7 out of 27 patents)

4. Takeo Ono (7 out of 10 patents)

5. Masayoshi Inooka (6 out of 8 patents)

6. Hiroshi Hozuma (5 out of 6 patents)

7. Etsuo Asanagi (5 out of 7 patents)

8. Hiroshi Yanagioka (4 out of 7 patents)

9. Masaharu Tomizawa (4 out of 4 patents)

10. Hideo Kikuchi (4 out of 4 patents)

11. Hideki Hashimoto (3 out of 33 patents)

12. Michihiro Yoshida (3 out of 15 patents)

13. Yoshiharu Tanaka (3 out of 15 patents)

14. Osamu Togari (3 out of 5 patents)

15. Haruo Nishino (3 out of 4 patents)

Core Competencies:

Dehalogenation

Hydrogenation

Gas Purification

Hydrocracking

Thermal Cracking

Waste Water Treatment

Hydrotreatment

Catalyst Development

Desulfurization

Heavy Hydrocarbon Processing

Gas-Liquid Contact

Soil Strengthening

62 patents: Sort by Forward Citations

1. 4957868 - Cylindrical hollow carriers for microorganisms made of nonwoven fabric (1990-09-18),

2. 4956326 - Method for dehalogenation of a halide and catalyst used therefor (1990-09-11),

3. 4931263 - Wet-process stack gas purification method (1990-06-05),

4. 4924966 - Muffler (1990-05-15),

5. 4909923 - Method for hydrogenation of coal tar pitch (1990-03-20),

6. 4765960 - Apparatus for installing pipe in multipipe type gas-liquid contact (1988-08-23),

7. 4728081 - Incinerating and melting apparatus (1988-03-01),

8. 4723595 - Heat exchanger using hydrogen storage alloy (1988-02-09),

9. 4562059 - Method of preparing alumina (1985-12-31),

10. 4555394 - Process for the preparation of alumina (1985-11-26),

11. 4530754 - Process for the conversion of heavy hydrocarbon oils into light (1985-07-23),

12. 4530753 - Method of converting heavy hydrocarbon oils into light hydrocarbon oils (1985-07-23),

13. 4525267 - Process for hydrocracking hydrocarbons with hydrotreatment-regeneration (1985-06-25),

14. 4487686 - Process of thermally cracking heavy hydrocarbon oils (1984-12-11),

15. 4486295 - Processing heavy hydrocarbon oils (1984-12-04),

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

62 Patents

#24 in Yokohama

#1,472 in Japan

#11,480 in the World

Yokohama, Japan

Chiyoda Chemical Engineering Construction Co., Ltd.

Forward Citations = 1,225

149 inventors:

Yoshimi Shiroto (11 out of 24 patents)

Munekazu Nakamura (11 out of 14 patents)

Sachio Asaoka (7 out of 27 patents)

4. Takeo Ono (7 out of 10 patents)

5. Masayoshi Inooka (6 out of 8 patents)

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