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Stella Chemifa Corporation

USPTO Granted Patents = 52

% Expired Patents = 57.7

CIPO Patents = 2

EPO Patents = 29

Trademarks = 4

Forward Citations = 119

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69 inventors (with patents filed for the assignee):

Tetsuo Nishida (25 out of 27 patents)

Kazutaka Hirano (19 out of 19 patents)

Masahide Waki (10 out of 18 patents)

4. Shinji Hashiguchi (9 out of 12 patents)

5. Akihiro Nabeshima (8 out of 17 patents)

6. Megumi Tomisaki (8 out of 9 patents)

7. Sojiro Kon (7 out of 7 patents)

8. Yasutaka Tashiro (7 out of 8 patents)

9. Masashi Yamamoto (7 out of 16 patents)

10. Kazuhiro Miyamoto (6 out of 6 patents)

11. Hiroaki Tokuda (6 out of 8 patents)

12. Toshitaka Sakaguchi (5 out of 5 patents)

13. Yoshifumi Katsura (5 out of 5 patents)

14. Yoshinori Sato (5 out of 11 patents)

15. Hirohisa Kikuyama (5 out of 32 patents)

Core Competencies:

Electrolyte Solutions

Nonaqueous Electrolyte

Fuel Cells

Quaternary Ammonium Salt

Fluoride Particles

Red Phosphor

Carbon Material

Microprocessing Treatment

Hollow Structural Body

Scintillator

Fluoride Crystal

Battery Technology

52 patents: Sort by Forward Citations

1. 12637615 - Microprocessing treatment agent and microprocessing treatment method (2026-05-26),

2. 12422591 - Liquid dispersion of fluoride particles and method for producing same, and optical film (2025-09-23),

3. 12191448 - Nonaqueous electrolyte solution for secondary battery, and secondary battery provided with said solution (2025-01-07),

4. 11965123 - Red phosphor and method for producing same (2024-04-23),

5. 11964871 - Immobilized product and method for producing same (2024-04-23),

6. 11548993 - Method for modifying fluoring resin film (2023-01-10),

7. 11469424 - Fuel cell catalyst, membrane electrode assembly for fuel cell, and fuel cell including the same (2022-10-11),

8. 11180515 - Non-aqueous electrolytic solution for power storage element (2021-11-23),

9. 11155465 - Cross-linked structure of carbon material and method for producing same (2021-10-26),

10. 11005125 - Nonaqueous electrolyte solution for secondary batteries and secondary battery provided with same (2021-05-11),

11. 10938066 - Nonaqueous electrolyte solution for secondary batteries and secondary battery provided with same (2021-03-02),

12. 10793585 - Phosphoric acid diester salt, production method therefor, non-aqueous electrolytic solution for power storage element, and power storage element (2020-10-06),

13. 10112835 - Method for purifying difluorophosphate (2018-10-30),

14. 10046971 - Nitrogen-containing carbon material and method of manufacturing the same (2018-08-14),

15. 9731968 - Process for producing fluoride gas (2017-08-15),

Stella Chemifa Corporation, based in Osaka, Japan, specializes in the development and manufacturing of advanced electrolyte solutions. The company focuses on nonaqueous electrolytes, which are essential for fuel cells and various energy storage applications. Their expertise extends to quaternary ammonium salts, fluoride particles, red phosphor, and carbon materials, all of which play a critical role in enhancing the performance and efficiency of electrochemical systems. Stella Chemifa is committed to innovation in the field of energy materials, contributing to advancements in sustainable technologies.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

52 Patents

#184 in Osaka

#1,667 in Japan

#13,537 in the World

Stella Chemifa Corporation

Forward Citations = 119

69 inventors:

Tetsuo Nishida (25 out of 27 patents)

Kazutaka Hirano (19 out of 19 patents)

Masahide Waki (10 out of 18 patents)

4. Shinji Hashiguchi (9 out of 12 patents)

5. Akihiro Nabeshima (8 out of 17 patents)

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