Ryoei Watanabe

This inventor holds 9 USPTO granted patents and 10 published patent applications and 1 EPO patent. Top assignees: Dowa Eco-System Co., Ltd., Dowa Eco-System Co., Ltd., Dowa Holdings Co., Ltd.. Active years: 2016-2026.

USPTO Granted Patents = 9 (Patent Applications = 10)

% Patents Active = 44.4

EPO Patents = 1 (Patent Applications = 20)

Average Co-Inventor Count = 4.4

ph-index = 1

Forward Citations = 2(Granted Patents)

Company Filing History:

5 out of 5

Dowa Eco-System Co., Ltd.

patents

3 out of 9

Dowa Eco-System Co., Ltd.

patents

1 out of 31

Dowa Holdings Co., Ltd.

where one patent can have more than one assignee

Years Active: 2016-2026

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12744261 - Method for recovering lithium and method for processing lithium ion secondary battery (2026-09-22),

2. 12735767 - Method for recovering valuable substance (2026-09-15),

3. 12716112 - Method for recovering valuable substance (2026-08-25),

4. 12706333 - Valuable matter recovery method (2026-08-11),

5. 12649960 - Method for recovering valuable substance (2026-06-09),

6. 12503747 - Method for separating lithium (2025-12-23),

7. 12303912 - Separation method for valuable resources (2025-05-20),

8. 10233099 - Radioactive cesium decontaminator and method of producing the same, and method of removing the radioactive cesium (2019-03-19),

9. 9359659 - Method for recovering valuable material from lithium-ion secondary battery, and recovered material containing valuable material (2016-06-07),

Title: Ryoei Watanabe: Innovator in Resource Separation and Decontamination Technologies

Introduction

Ryoei Watanabe is a notable inventor based in Tokyo, Japan. He has made significant contributions to the fields of resource separation and radioactive decontamination. With a total of three patents to his name, Watanabe's work reflects a commitment to innovation and environmental sustainability.

Latest Patents

Watanabe's latest patents include a separation method for valuable resources. This method involves a thermal treatment step that melts aluminum to separate a melt, followed by a pulverizing step to obtain a pulverized product. Additionally, it incorporates a magnetic sorting step to extract valuable resources from the pulverized product and a wind force sorting step to further separate different valuable resources. Another significant patent is for a radioactive cesium decontaminator and the method of producing it. This decontaminator is designed to remove radioactive cesium effectively, utilizing a unique structure formed by agglomeration of primary particles. The primary particles consist of a magnetic core, an organic coating layer, and a capturing compound made of ferrocyanide material.

Career Highlights

Throughout his career, Watanabe has worked with prominent organizations such as Dowa Eco-system Co., Ltd. and The Jikei University. His experience in these institutions has allowed him to develop and refine his innovative technologies.

Collaborations

Watanabe has collaborated with notable colleagues, including Yoshihiro Honma and Koji Fujita. These partnerships have contributed to the advancement of his research and inventions.

Conclusion

Ryoei Watanabe's contributions to innovation in resource separation and radioactive decontamination highlight his role as a leading inventor in these critical fields. His patents reflect a dedication to improving environmental safety and resource management.