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For the Inventor, By the Inventor

Yamaguchi, Japan

Tosoh Finechem Corporation


USPTO Granted Patents = 33

% Expired Patents = 15.2


Trademarks = 3

Forward Citations = 1,179

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46 inventors (with patents filed for the assignee):

goldMedal Kenichi Haga (11 out of 11 patents)

silverMedal Kouji Toyota (10 out of 10 patents)

bronzeMedal Koichiro Inaba (7 out of 10 patents)

4.  Eiichi Kaji (7 out of 7 patents)

5.  Toshio Naka (6 out of 6 patents)

6.  Shizuo Tomiyasu (6 out of 6 patents)

7.  Kohichi Tokudome (6 out of 6 patents)

8.  Hiroshi Matsuo (5 out of 5 patents)

9.  Yujin Takemoto (5 out of 5 patents)

10.  Norihisa Kondo (4 out of 8 patents)

11.  Toshiaki Taniike (3 out of 5 patents)

12.  Hideki Miyauchi (3 out of 3 patents)

13.  Etsuo Yoshioka (3 out of 3 patents)

14.  Yusuke Shigeta (3 out of 3 patents)

15.  Shinichiro Nakamura (2 out of 2 patents)


Core Competencies:
Polymer Nanocomposite
Zinc Oxide Thin Film
Aluminum Oxide
Perfluorinated Compounds
Polyolefin
Amphipathic Aryl Sulfonic Acid
Trialkyl Aluminum
Solid Polymethylaluminoxane
Cross-Coupling
Heat Stabilization
Organometallic Compound

33 patents:

1. 12595241 - Method of producing perfluoro(2,4-dimethyl-2-fluoroformyl-1,3-dioxolane) (2026-04-07),
2. 12516143 - Polystyrene-based polyampholyte having upper critical solution temperature, and application for same (2026-01-06),
3. 12151261 - Composition for formation of zinc oxide thin film, and method for producing a zinc oxide thin film (2024-11-26),
4. 11840522 - Method of stabilizing perfluoro(2-methylene-4-methyl-1,3-dioxolane) and composition containing stabilized perfluoro(2-methylene-4-methyl-1,3-dioxolane) (2023-12-12),
5. 11820871 - Aluminum oxide-forming composition and method for producing same (2023-11-21),
6. 11795277 - Polyolefin-based polymer nanocomposite containing zinc oxide particles and method of producing same (2023-10-24),
7. 11767308 - Method of stabilizing perfluorodioxolane compound, perfluorodioxolane compound-containing composition and method of producing perfluorodioxolane compound polymer (2023-09-26),
8. 11591349 - Aluminum alloy-containing composition, production method therefor, and trialkyl aluminum production method (2023-02-28),
9. 11555024 - Aldehyde adduct of hexafluoropropylene oxide, method of manufacturing trifluoropyruvyl fluoride dimer and method of manufacturing perfluoro(2,4-dimethyl-2-fluoroformyl-1,3-dioxolane) (2023-01-17),
10. 11482709 - Aluminum oxide article (2022-10-25),
11. 11459410 - High-purity amphipathic arylsulfonic acid amine salt vinyl monomer and copolymer thereof (2022-10-04),
12. 11453786 - Dialkylzinc- and dialkylzinc partial hydrolysate-containing solution, and method for producing zinc oxide thin film using solution (2022-09-27),
13. 11352457 - Fluorine-containing compound having unsaturated bond, and surface modifier using the same (2022-06-07),
14. 11267940 - Aluminum-oxide-forming composition and method for producing same, and polyolefin-based polymer nanocomposite containing zinc oxide particles or aluminum oxide particles and method of producing same (2022-03-08),
15. 10870666 - Aluminum alloy-containing composition, production method therefor, and trialkyl aluminum production method (2020-12-22),
Company Overview
Tosoh Finechem Corporation, based in Yamaguchi, Japan, specializes in the development and manufacturing of high-performance chemical products. The company focuses on advanced materials and fine chemicals, catering to various industries including electronics, pharmaceuticals, and environmental applications. With a commitment to innovation, Tosoh Finechem leverages cutting-edge technology to enhance product performance and sustainability, positioning itself as a key player in the global fine chemical market.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

33 Patents

#6 in Yamaguchi

#2,201 in Japan

#20,147 in the World

Yamaguchi, JP
Yamaguchi, Japan

Tosoh Finechem Corporation

Forward Citations = 1,179

46 inventors:

goldMedal Kenichi Haga (11 out of 11 patents)

silverMedal Kouji Toyota (10 out of 10 patents)

bronzeMedal Koichiro Inaba (7 out of 10 patents)

4.  Eiichi Kaji (7 out of 7 patents)

5.  Toshio Naka (6 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tosoh Finechem Corporation. Retrieved from https://idiyas.com/company/tosoh-finechem

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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