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Koei Chemical Company, Limited

USPTO Granted Patents = 48

EPO Patents = 6

Trademarks = 2

Forward Citations = 184

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86 inventors (with patents filed for the assignee):

Motoyoshi Miyagi (6 out of 6 patents)

Takayuki Shoji (6 out of 7 patents)

Shinkichi Shimizu (6 out of 20 patents)

4. Shingo Nitta (5 out of 5 patents)

5. Nanao Watanabe (5 out of 5 patents)

6. Toru Nakaishi (4 out of 4 patents)

7. Shinichi Yasuda (4 out of 4 patents)

8. Nobuyuki Abe (4 out of 5 patents)

9. Takayuki Kurohara (4 out of 4 patents)

10. Hitomi Tsuboi (3 out of 3 patents)

11. Ayao Moriyama (3 out of 3 patents)

12. Masanori Doba (3 out of 4 patents)

13. Akira Iguchi (3 out of 5 patents)

14. Hideki Kuranishi (3 out of 3 patents)

15. Shogo Takahashi (2 out of 2 patents)

Core Competencies:

Polyisocyanate Composition

Amidate Compound

Silylamine Compound

Thermosetting Composition

Solid Electrolytic Capacitor

Quaternary Ammonium Salts

Heterocyclic Aldehyde

Pyrazine Compounds

Epoxy Resin

Nitriles

Pyridine Bases

Uranium Recovery

48 patents: Sort by Forward Citations

1. 12466912 - Blocked polyisocyanate composition, heat-curable resin composition, cured product, and production method therefor (2025-11-11),

2. 12291506 - Method for producing amidate compound, and amidate compound (2025-05-06),

3. 12091491 - Silylamine compound and latent curing agent comprising said silylamine compound (2024-09-17),

4. 11718704 - Catalyst for dissociation of blocking agent for blocked isocyanates, and thermosetting composition containing said catalyst for dissociation of blocking agent (2023-08-08),

5. 10913724 - Production method for amidate compound (2021-02-09),

6. 10689478 - Amidate compound, catalyst for polyurethane production, and method for producing polyurethane resin (2020-06-23),

7. 10087155 - Onium salt, liquid composition containing said onium salt and cellulose, and cellulose recovery method (2018-10-02),

8. 9611280 - Tetraaryl borate compound and method for producing same (2017-04-04),

9. 9365492 - 2-(ethylamino)ethanol production method (2016-06-14),

10. 9102587 - Method for producing 2-(isopropylamino)ethanol (2015-08-11),

11. 8654510 - Solid electrolytic capacitor and method of manufacturing solid electrolytic capacitor (2014-02-18),

12. 7411092 - Quaternary ammonium salts (2008-08-12),

13. 7342116 - Process for producing heterocyclic aldehyde (2008-03-11),

14. 7053079 - Dihydroxy (3-pyridyl) borane compounds (2006-05-30),

15. 6444815 - Method for producing heteroaromatic aldehydes (2002-09-03),

KOEI CHEMICAL COMPANY, LIMITED is a global chemical company specializing in the production and distribution of various chemical products. With over 50 years of experience in the industry, we have established ourselves as a trusted supplier to a wide range of industries, including automotive, electronics, and pharmaceuticals. Our commitment to quality, innovation, and sustainability has earned us a strong reputation in the market. Visit our website to learn more about our products and services.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

48 Patents

#19 in Chiba

#1,722 in Japan

#14,125 in the World

Koei Chemical Company, Limited

Forward Citations = 184

86 inventors:

Motoyoshi Miyagi (6 out of 6 patents)

Takayuki Shoji (6 out of 7 patents)

Shinkichi Shimizu (6 out of 20 patents)

4. Shingo Nitta (5 out of 5 patents)

5. Nanao Watanabe (5 out of 5 patents)

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