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Sumikin Chemical Co., Ltd.

USPTO Granted Patents = 12

Forward Citations = 23

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30 inventors (with patents filed for the assignee):

Ikuo Ito (6 out of 8 patents)

Toshio Sato (6 out of 8 patents)

Keiichi Yokota (3 out of 5 patents)

4. Kazuhiko Maeda (3 out of 3 patents)

5. Kyoichi Takeda (3 out of 3 patents)

6. Takeshi Namekata (2 out of 6 patents)

7. Teruaki Yamada (2 out of 2 patents)

8. Kazuki Sugiura (2 out of 2 patents)

9. Yoshihisa Sone (2 out of 3 patents)

10. Haruyuki Kano (2 out of 5 patents)

11. Katsumi Satoh (1 out of 36 patents)

12. Kenji Kageyama (1 out of 2 patents)

13. Seiji Takeuchi (1 out of 1 patent)

14. Sugio Otani (1 out of 17 patents)

15. Yoshiji Doko (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 6054609 - Method of separating isomers of nitrotoluic acid (2000-04-25),

2. 5721332 - Phenolic resin (1998-02-24),

3. 5550284 - Production method for alkoxynaphthalenecarboxylic acid (1996-08-27),

4. 5463156 - Method and apparatus for dehydrogenation (1995-10-31),

5. 5416256 - Process for manufacturing 5-hydroxyisophthalic acid (1995-05-16),

6. 5414174 - Side-chain alkylation method (1995-05-09),

7. 5354899 - Production process of 1,4,5,8-naphthalene tetracarboxylic acid (1994-10-11),

8. 5095135 - Process for the preparation of high-purity naphthalenecarboxylic acid (1992-03-10),

9. 5094722 - Process for the purification of a dimethylphenol isomer (1992-03-10),

10. 5066384 - Process for refining coal-derived heavy carbonaceous materials (1991-11-19),

11. 5017683 - Condensed polycyclic, polynuclear aromatic thermosetting resin having (1991-05-21),

12. 4925977 - Method for the preparation of naphthalene dicarboxylic acids (1990-05-15),

Sumikin Chemical Co., Ltd. is a leading chemical company based in Japan. With over 50 years of experience, we specialize in the production and sale of various chemical products for industrial use. Our products range from adhesives and coatings to resins and specialty chemicals. We are committed to providing high-quality solutions and excellent customer service to meet the diverse needs of our clients worldwide.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

12 Patents

#1,516 in Tokyo

#3,840 in Japan

#46,762 in the World

Sumikin Chemical Co., Ltd.

Forward Citations = 23

30 inventors:

Ikuo Ito (6 out of 8 patents)

Toshio Sato (6 out of 8 patents)

Keiichi Yokota (3 out of 5 patents)

4. Kazuhiko Maeda (3 out of 3 patents)

5. Kyoichi Takeda (3 out of 3 patents)

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