Yasutomo Shimizu

This inventor holds 17 USPTO granted patents, plus 1 CIPO patent and 7 EPO patents. Top assignees: Tokuyama Corporation, Kagoshima University. Active years: 2014-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasutomo Shimizu. Retrieved from https://idiyas.com/inventor/yasutomo-shimizu

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

USPTO Granted Patents = 17

% Patents Active = 82.4

CIPO Patents = 1 (Patent Applications = 2)

EPO Patents = 7 (Patent Applications = 11)

Average Co-Inventor Count = 3.6

ph-index = 2

Forward Citations = 12(Granted Patents)

Location History:

Ibaraki, JP (2016)
Yamaguchi, JP (2016)
Shunan, JP (2014 - 2023)
Tsukuba, JP (2016 - 2024)

Company Filing History:

where one patent can have more than one assignee

Years Active: 2014-2025

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17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12503575 - Fine hollow particles comprising melamine-based resin (2025-12-23),

2. 11912813 - Urethane resin using polyrotaxane, and pad for polishing (2024-02-27),

3. 11767467 - Photochromic compound and curable composition containing said photochromic compound (2023-09-26),

4. 11649327 - Photochromic curable composition, use thereof, and polyrotaxane monomers (2023-05-16),

5. 11578174 - Polyrotaxane, production method therefor, and optical composition containing said polyrotaxane (2023-02-14),

6. 11066523 - Photochromic polyrotaxane compound and curable composition comprising the photochromic polyrotaxane compound (2021-07-20),

7. 10920007 - Urethane resin comprising a polyrotaxane and polishing pad (2021-02-16),

8. 10526533 - Process for producing a photochromic cured body (2020-01-07),

9. 10494488 - Polyrotaxane, production method therefor, and optical composition containing said polyrotaxane (2019-12-03),

10. 10125309 - Photochromic composition (2018-11-13),

11. 9890324 - Photochromic curable composition, cured product thereof and laminate including the cured product (2018-02-13),

12. 9873819 - Curable composition and photochromic composition (2018-01-23),

13. 9513407 - Photochromic composition and optical article using photochromic composition (2016-12-06),

14. 9377664 - Photocromic composition (2016-06-28),

15. 9316765 - Photochromic composition (2016-04-19),

Title: Yasutomo Shimizu: Innovator in Urethane Resins and Photochromic Compounds

Introduction

Yasutomo Shimizu is a prominent inventor based in Shunan, Japan. He has made significant contributions to the fields of materials science and polymer chemistry. With a total of 16 patents to his name, Shimizu has developed innovative solutions that enhance the performance of various materials.

Latest Patents

Among his latest patents, Shimizu has created a urethane resin using polyrotaxane. This invention involves a unique polymerizable composition that results in a urethane resin with high abrasion resistance, making it suitable for use as a polishing pad. Additionally, he has developed a photochromic compound and a curable composition that retains high photochromic characteristics while ensuring solubility in polymerizable matrices.

Career Highlights

Shimizu's career is marked by his work at Tokuyama Corporation, where he has been instrumental in advancing the company's research and development efforts. His innovative approaches have led to the creation of materials that meet the demands of modern applications.

Collaborations

Shimizu has collaborated with notable coworkers, including Katsuhiro Mori and Junji Momoda. Their combined expertise has contributed to the successful development of various projects and patents.

Conclusion

Yasutomo Shimizu's contributions to the field of materials science through his patents and innovations highlight his role as a leading inventor. His work continues to influence the development of advanced materials in various industries.

Profile summary based on public USPTO records.