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Kyotoshi, Japan

San-apro Limited

USPTO Granted Patents = 22

EPO Patents = 10

Forward Citations = 57

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33 inventors (with patents filed for the assignee):

Hideki Kimura (7 out of 9 patents)

Nobuyasu Nakasugi (6 out of 7 patents)

Yusaku Takashima (4 out of 4 patents)

4. Jiro Yamamoto (4 out of 4 patents)

5. Takuto Nakao (4 out of 4 patents)

6. Issei Suzuki (3 out of 10 patents)

7. Yuji Nakamura (3 out of 3 patents)

8. Masashi Date (3 out of 10 patents)

9. Noriya Fukunaga (2 out of 2 patents)

10. Takuya Ikeda (2 out of 14 patents)

11. Atsushi Shiraishi (2 out of 3 patents)

12. Shinji Yamashita (2 out of 2 patents)

13. Keiichi Nakatani (2 out of 5 patents)

14. Yoshitaka Komuro (1 out of 42 patents)

15. Hirofumi Imai (1 out of 25 patents)

22 patents: Sort by Forward Citations

1. 12461444 - Sulfonium salt, photoacid generator, curable composition, and resist composition (2025-11-04),

2. 12422747 - Negative photosensitive resin composition, pattern formation method, and laminated film (2025-09-23),

3. 12129240 - Sulfonium salt, photoacid generator, curable composition and resist composition (2024-10-29),

4. 11926581 - Sulfonium salt, photoacid generator, curable composition, and resist composition (2024-03-12),

5. 11370751 - Sulfonium salt, heat- or photo-acid generator, heat- or photo-curable composition, and cured product thereof (2022-06-28),

6. 10683266 - Sulfonium salt, photoacid generator, photocurable composition, and cured product thereof (2020-06-16),

7. 10450266 - Sulfonate compound, photoacid generator, and resin composition for photolithography (2019-10-22),

8. 9933701 - Photobase generator (2018-04-03),

9. 9045398 - Sulfonium salt and photo-acid generator (2015-06-02),

10. 8617787 - Sulfonium salt, photo-acid generator, and photosensitive resin composition (2013-12-31),

11. 8338074 - Actinic radiation-curable stereolithographic resin composition having improved stability (2012-12-25),

12. 8329771 - Photobase generator (2012-12-11),

13. 8278030 - Sulfonium salt, photoacid generator, and photocurable composition and cured body thereof (2012-10-02),

14. 7709598 - Fluorinated alkyl fluorophoshoric acid salts of onium and transition metal complex (2010-05-04),

15. 7709548 - Method for manufacturing monosulfonium salt, cationic polymerization initiator, curable composition, and cured product (2010-05-04),

SAN-APRO LIMITED is a leading provider of professional IT solutions and biosecurity services. With expertise in software development, network management, and information security, we help organizations improve their technology infrastructure and protect against cyber threats. Visit our website to learn more about our offerings and how we can assist your business.

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USPTO Data Jan 1 1976 - Dec 23 2025

22 Patents

#4 in Kyotoshi

#2,724 in Japan

#27,885 in the World

Kyotoshi, Japan

San-apro Limited

Forward Citations = 57

33 inventors:

Hideki Kimura (7 out of 9 patents)

Nobuyasu Nakasugi (6 out of 7 patents)

Yusaku Takashima (4 out of 4 patents)

4. Jiro Yamamoto (4 out of 4 patents)

5. Takuto Nakao (4 out of 4 patents)

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