Tatsuo Nagata

This inventor holds 17 USPTO granted patents and 2 published patent applications, plus 1 CIPO patent and 7 EPO patents. Top assignees: Nippon Steel Sumitomo Metal Corporation, Nippon Steel Corporation, Chuo Denki Kogyo Co., Ltd.. Active years: 2011-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsuo Nagata. Retrieved from https://idiyas.com/inventor/tatsuo-nagata

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

USPTO Granted Patents = 17 (Patent Applications = 2)

% Patents Active = 70.6

CIPO Patents = 1

EPO Patents = 7 (Patent Applications = 14)

Average Co-Inventor Count = 3.5

ph-index = 2

Forward Citations = 16(Granted Patents)

Location History:

Osaka, JP (2011 - 2013)
Ikeda, JP (2013 - 2019)
Kisarazu, JP (2019)
Tokyo, JP (2021 - 2024)

Company Filing History:

7 out of 1,102

Nippon Steel Sumitomo Metal Corporation

patents

6 out of 3,711

Nippon Steel Corporation

patents

4 out of 8

Chuo Denki Kogyo Co., Ltd.

patents

4. 2 out of 122

Nippon Steel Chemical & Material Co., Ltd.

patents

5. 1 out of 914

Tsubakimoto Chain Company

patents

where one patent can have more than one assignee

Years Active: 2011-2025

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12494533 - Battery case and method of production of same (2025-12-09),

2. 12334563 - Ni-plated steel foil for nickel-hydrogen secondary battery current collector, nickel-hydrogen secondary battery current collector, and nickel-hydrogen secondary battery (2025-06-17),

3. 12199277 - Negative electrode active material, negative electrode, and battery (2025-01-14),

4. 12100844 - Stainless foil current collector for secondary battery positive electrodes (2024-09-24),

5. 11981108 - Ni-plated steel sheet and manufacturing method thereof (2024-05-14),

6. 11387449 - Negative electrode active material, negative electrode, and battery (2022-07-12),

7. 11056687 - Negative electrode active material, negative electrode, and battery (2021-07-06),

8. 10381640 - Negative electrode active material (2019-08-13),

9. 10270092 - Negative electrode active material, negative electrode and battery (2019-04-23),

10. 10230103 - Negative electrode active material, negative electrode and battery (2019-03-12),

11. 10128493 - Negative electrode active material, negative electrode and battery (2018-11-13),

12. 10038184 - Negative electrode active material, negative electrode and battery (2018-07-31),

13. 9028711 - Negative electrode material for a nonaqueous electrolyte secondary battery and a method for its manufacture (2015-05-12),

14. 8591765 - Negative electrode material for nonaqueous electrolyte secondary batteries and manufacturing method thereof (2013-11-26),

15. 8501047 - Mixed carbon material and negative electrode for a nonaqueous secondary battery (2013-08-06),

Title: Innovations of Tatsuo Nagata in Nickel-Hydrogen Battery Technology

Introduction

Tatsuo Nagata is a prominent inventor based in Ikeda, Japan, known for his significant contributions to the field of nickel-hydrogen battery technology. With a total of 16 patents to his name, Nagata has developed innovative materials and methods that enhance the performance and efficiency of these batteries. His work has been instrumental in advancing energy storage solutions.

Latest Patents

Nagata's latest patents include a Ni-plated steel foil designed for nickel-hydrogen secondary battery current collectors. This innovation features a high-strength steel foil that is lightweight, economical, and exhibits excellent rust resistance and resistance to metal ion leaching. The Ni-plated steel foil has specific chemical compositions, including carbon, silicon, manganese, phosphorus, sulfur, aluminum, nitrogen, and titanium or niobium, ensuring optimal performance. Additionally, he has developed a negative electrode active material that excels in capacity, capacity retention ratio, and coulombic efficiency during repeated charging and discharging cycles.

Career Highlights

Throughout his career, Tatsuo Nagata has worked with notable companies such as Nippon Steel & Sumitomo Metal Corporation and Nippon Steel Corporation. His experience in these organizations has allowed him to refine his expertise in materials science and battery technology, leading to his numerous patents and innovations.

Collaborations

Nagata has collaborated with esteemed colleagues, including Sukeyoshi Yamamoto and Noriyuki Negi. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and advancements in battery technology.

Conclusion

Tatsuo Nagata's contributions to nickel-hydrogen battery technology through his innovative patents and collaborations have significantly impacted the field. His work continues to pave the way for advancements in energy storage solutions, showcasing the importance of innovation in modern technology.

Profile summary based on public USPTO records.