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Hodogaya Chemical Co., Ltd.

USPTO Granted Patents = 328

CIPO Patents = 4

EPO Patents = 116

Trademarks = 11

Forward Citations = 1,585

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468 inventors (with patents filed for the assignee):

Norimasa Yokoyama (54 out of 54 patents)

Shuichi Hayashi (54 out of 54 patents)

Mitsutoshi Anzai (42 out of 43 patents)

4. Naoaki Kabasawa (29 out of 29 patents)

5. Shigeru Kusano (28 out of 28 patents)

6. Atsushi Takesue (25 out of 25 patents)

7. Makoto Nagaoka (23 out of 23 patents)

8. Masaomi Sasaki (23 out of 170 patents)

9. Takeshi Yamamoto (22 out of 145 patents)

10. Tomoyuki Shimada (22 out of 132 patents)

11. Susumu Suzuka (18 out of 32 patents)

12. Kouki Kase (16 out of 16 patents)

13. Shunji Mochizuki (16 out of 16 patents)

14. Michihiro Gonda (16 out of 16 patents)

15. Katsumi Abe (15 out of 73 patents)

Core Competencies:

Organic Electroluminescent Device

Polycyclic Aromatic Compound

Triarylamine Structure

Pyrimidine Ring Structure

Benzazole Ring Structure

Photoelectric Conversion Element

High Molecular Weight Compound

Indenocarbazole Compound

Spiro Compound

Light-Emitting Material

Hair Coloration Composition

Biopolyether Polyol

328 patents: Sort by Forward Citations

1. 12317744 - Compound having a fused-azole ring structure and organic electroluminescent element (2025-05-27),

2. 12281248 - Organic light-emitting element using polycyclic aromatic derivative compound (2025-04-21),

3. 12279523 - Compound, hole transport material, and photoelectric conversion element including same (2025-04-14),

4. 12221430 - Compound having pyrimidine ring structure and organic electroluminescence device (2025-02-11),

5. 12219872 - Organic electroluminescent element (2025-02-04),

6. 12102002 - Compound having benzazole ring structure, and organic electroluminescent device (2024-09-24),

7. 12089488 - Organic electroluminescent device (2024-09-10),

8. 12037332 - Compound including benzimidazole ring structure and organic electroluminescent element (2024-07-16),

9. 12024527 - Compound having azabenzoxazole ring structure and organic electroluminescent element (2024-07-02),

10. 11999818 - High molecular weight triarylamine compound comprising terphenyl structure in molecular main chain and organic electroluminescent element comprising said high molecular weight compound (2024-06-04),

11. 11997870 - Organic electroluminescent element and method for producing same (2024-05-28),

12. 11980092 - Organic electroluminescence element (2024-05-07),

13. 11974499 - Organic EL device, amine compound having benzazole ring structure, and method in which said amine compound is used in capping layer of organic EL device (2024-04-30),

14. 11968882 - High-molecular-weight compound including substituted triarylamine structural unit, and organic electroluminescent device (2024-04-23),

15. 11944004 - Organic electroluminescence element (2024-03-26),

Hodogaya Chemical Co., Ltd. is a leading chemical manufacturer based in Japan. With over 100 years of experience in the industry, the company specializes in the production of various chemicals for multiple sectors including pharmaceuticals, cosmetics, and industrial applications. Hodogaya Chemical is known for its commitment to quality, innovation, and sustainability. They strive to develop cutting-edge solutions that meet the evolving needs of their customers and contribute to the advancement of society. For more information about Hodogaya Chemical and their wide range of products, 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

328 Patents

#226 in Tokyo

#489 in Japan

#2,670 in the World

Hodogaya Chemical Co., Ltd.

Forward Citations = 1,585

468 inventors:

Norimasa Yokoyama (54 out of 54 patents)

Shuichi Hayashi (54 out of 54 patents)

Mitsutoshi Anzai (42 out of 43 patents)

4. Naoaki Kabasawa (29 out of 29 patents)

5. Shigeru Kusano (28 out of 28 patents)

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