Shigeto Okada

This inventor holds 25 USPTO granted patents and 5 published patent applications, plus 10 CIPO patents and 13 EPO patents, primarily in Lithium-Ion Battery Technology. Top assignees: Kyushu University, Ngk Insulators, Inc., Nippon Telegraph and Telephone Corporation. Active years: 1987-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigeto Okada. Retrieved from https://idiyas.com/inventor/shigeto-okada

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

USPTO Granted Patents = 25 (Patent Applications = 5)

% Patents Active = 64.0

CIPO Patents = 10 (Patent Applications = 1)

EPO Patents = 13 (Patent Applications = 5)

Average Co-Inventor Count = 4.3

ph-index = 8

Forward Citations = 173(Granted Patents)

Location History:

Mito, JP (1987 - 1998)
Kasuga, JP (2010)
Fukuoka-shi, Fukuoka, JP (2010)
Sawara-ku, Fukuoka-shi, Fukuoka, JP (2010)
Fukuoka-ken, JP (2013)
Fukuoka, JP (2009 - 2022)

Company Filing History:

Nippon Telegraph and Telephone Corporation

patents

4. 4 out of 38,912

Toyota Jidosha Kabushiki Kaisha

patents

5. 3 out of 244

Mitsui Engineering and Shipbuilding Company Limited

patents

6. 2 out of 77

Kanto Denka Kogyo Co., Ltd.

patents

7. 2 out of 6,961

Sumitomo Chemical Company, Limited

patents

8. 1 out of 1

Japan as Represented by President of the University of Kyusyu

patent

9. 1 out of 1

Japan as Represented by the President of the University of Kyusyu

patent

10. 1 out of 4,746

Mitsubishi Heavy Industries Limited

patents

11. 1 out of 13,796

Murata Manufacturing Co., Ltd.

13. 2 out of 834,513

Other

patents

where one patent can have more than one assignee

Years Active: 1987-2025

Loading Chart...

Areas of Expertise:

Aqueous Sodium Ion

Lithium Secondary Battery

All-Solid-State Cell

Cathode Active Material

Positive Electrode

Electroactive Material

Iron Oxyfluoride

Non-Aqueous Electrolyte

Amorphous Electrode

Battery Manufacturing

Positive Electrode Active Material

25 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12322761 - Aqueous sodium ion secondary battery (2025-06-03),

2. 11355752 - Positive electrode active substance for non-aqueous secondary battery and non-aqueous secondary battery including the same (2022-06-07),

3. 9780369 - Cathode active material for lithium batteries, and lithium battery comprising the cathode active material for lithium batteries (2017-10-03),

4. 9312538 - Method for producing iron oxyfluoride positive electrode active substance and iron oxyflouride positive electrode active substance (2016-04-12),

5. 9209486 - All-solid-state cell (2015-12-08),

6. 9209484 - All-solid-state cell (2015-12-08),

7. 8974963 - Lithium secondary battery (2015-03-10),

8. 8865349 - Method of producing positive electrode active material and nonaqueous electrolyte battery using the same (2014-10-21),

9. 8709655 - Positive electrode active material for nonaqueous electrolyte secondary battery (2014-04-29),

10. 8703334 - Amorphous electrode active material and lithium secondary battery (2014-04-22),

11. 8454925 - Cathode active material for non-aqueous electrolyte secondary battery and manufacturing method of the same (2013-06-04),

12. 8197972 - All-solid-state cell (2012-06-12),

13. 8142934 - Positive electrode for non-aqueous electrolytic secondary cell and non-aqueous electrolytic secondary cell (2012-03-27),

14. 7964118 - Positive electrode active material and method of producing the same and nonaqueous electrolyte battery having positive electrode containing positive electrode active material (2011-06-21),

15. 7914932 - All-solid-state battery (2011-03-29),

Title: The Innovative Contributions of Shigeto Okada

Introduction

Shigeto Okada, a prolific inventor based in Fukuoka, Japan, has made significant strides in the field of battery technology. With a remarkable portfolio of 20 patents, Okada has dedicated his career to enhancing the efficiency and performance of energy storage devices, particularly lithium batteries.

Latest Patents

Among Shigeto Okada's latest patents are two groundbreaking inventions: the positive electrode active substance for non-aqueous secondary batteries and the cathode active material for lithium batteries. The positive electrode active substance introduces a metal or metal compound that undergoes conversion reactions, enhancing the battery's performance. This invention focuses on metals such as Vanadium, Chromium, Molybdenum, Manganese, Titanium, and Nickel, combined with an amorphous metal oxide. The cathode active material aims to significantly increase the discharge capacity of lithium batteries compared to conventional models, utilizing a rock salt type crystal structure embodied in the chemical formula LiNiCoMnTiO, with specific parameters for the elements.

Career Highlights

Shigeto Okada has established his expertise through his affiliations with notable institutions such as Kyushu University, National University Corporation, and NGK Insulators, Inc. His work at these organizations has fueled advancements in battery technology and energy storage systems, showcasing his commitment to innovation.

Collaborations

Collaboration has played a vital role in Okada's journey as an inventor. He has worked alongside prominent colleagues such as Jun-ichi Yamaki and Toshihiro Yoshida, exchanging ideas and insights that have driven the development of significant technologies in the battery field.

Conclusion

Shigeto Okada's contributions to battery technology reflect a dedication to innovation and collaboration. With 20 patents to his name, his work continues to pave the way for advancements in energy storage solutions, securing a lasting impact on the industry and the future of sustainable energy.

Profile summary based on public USPTO records.