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Honshu Chemical Industry Co., Ltd.

USPTO Granted Patents = 57

EPO Patents = 15

Forward Citations = 50

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89 inventors (with patents filed for the assignee):

Kenji Ekawa (12 out of 12 patents)

Kazuhiko Yao (10 out of 10 patents)

Akira Yoshitomo (9 out of 9 patents)

4. Tatsuya Iwai (8 out of 8 patents)

5. Takeru Suto (6 out of 7 patents)

6. Yoichiro Isota (6 out of 7 patents)

7. Toru Nakaguchi (6 out of 6 patents)

8. Mitsutaka Ozaki (5 out of 6 patents)

9. Miwa Hashimoto (5 out of 6 patents)

10. Takafumi Tsujigami (4 out of 4 patents)

11. Kentaro Watanabe (4 out of 4 patents)

12. Taiichi Shiomi (4 out of 4 patents)

13. Akihito Nasu (3 out of 3 patents)

14. Tadashi Hiramine (3 out of 3 patents)

15. Mikio Kawahara (3 out of 4 patents)

Core Competencies:

Trisphenol Derivative

Liquid-Crystal Polyester

Aromatic Bis Ether Compound

Polycarbonate Oligomer

Tetracarboxylic Acid Compound

Polynuclear Polyphenol

Hydroxyphenyl Adamantanes

Acyloxybiphenyl Compound

Carboxylic Acid Ester

Orthoalkylation Catalyst

Bisphenol Compound

Trimellitic Anhydride

57 patents: Sort by Forward Citations

1. 12479784 - Trisphenol derivative (2025-11-25),

2. 12421452 - Method for producing liquid-crystal polyester processed product (2025-09-23),

3. 12398088 - Method for producing aromatic bis ether compound (2025-08-26),

4. 12304886 - Composition for resin raw material (2025-05-20),

5. 12037315 - Production method for 4-hydroxy-2-methylbenzoic acid (2024-07-16),

6. 11964939 - Aromatic tetracarboxylic acid compound (2024-04-23),

7. 11932598 - Polyacyloxymethyl-4,4′-acyloxybiphenyl compound (2024-03-19),

8. 11884864 - Method for producing liquid-crystal polyester processed product (2024-01-30),

9. 11208378 - Alkoxymethyl-substituted bisphenol compound (2021-12-28),

10. 11130841 - Aromatic polycarbonate oligomer solid (2021-09-28),

11. 11130840 - Aromatic polycarbonate oligomer solid (2021-09-28),

12. 11118009 - Aromatic polycarbonate oligomer solid (2021-09-14),

13. 10759755 - Bisphenol compound and aromatic polycarbonate (2020-09-01),

14. 10655010 - Aromatic polycarbonate oligomer solid (2020-05-19),

15. 10654971 - Aromatic polycarbonate oligomer solid (2020-05-19),

Honshu Chemical Industry Co., Ltd. is a leading chemical manufacturing company based in Japan. With over 50 years of experience, the company specializes in the production and distribution of various chemical products, including industrial chemicals, pharmaceutical intermediates, and functional materials. They are committed to providing high-quality products and innovative solutions to meet the diverse needs of their customers. For more information about Honshu Chemical Industry Co., Ltd., please visit their website.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

57 Patents

#649 in Tokyo

#1,540 in Japan

#12,152 in the World

Honshu Chemical Industry Co., Ltd.

Forward Citations = 50

89 inventors:

Kenji Ekawa (12 out of 12 patents)

Kazuhiko Yao (10 out of 10 patents)

Akira Yoshitomo (9 out of 9 patents)

4. Tatsuya Iwai (8 out of 8 patents)

5. Takeru Suto (6 out of 7 patents)

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