Kei Tajima

This inventor holds 16 USPTO granted patents and 7 published patent applications and 1 EPO patent. Top assignee: Sumitomo Rubber Industries Limited. Active years: 2001-2026.

USPTO Granted Patents = 16 (Patent Applications = 7)

% Patents Active = 50.0

EPO Patents = 1 (Patent Applications = 3)

Average Co-Inventor Count = 1.9

ph-index = 3

Forward Citations = 26(Granted Patents)

Location History:

Amagasaki, JP (2001)
Hyogo, JP (2010)
Kobe, JP (2003 - 2018)

Company Filing History:

16 out of 4,539

Sumitomo Rubber Industries Limited

patents

Years Active: 2001-2026

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12622985 - Sterilization method for medical rubber part (2026-05-12),

2. 12577377 - Medical rubber composition, medical rubber part, and packaging article for medical rubber part (2026-03-17),

3. 10012927 - Developing roller including roller body with simplified structure without a coating film (2018-07-03),

4. 9885970 - Semiconductive roller (2018-02-06),

5. 9880490 - Semiconductive roller for image developing roller (2018-01-30),

6. 9703225 - Semiconductive roller (2017-07-11),

7. 9639025 - Semiconductive roller (2017-05-02),

8. 9539744 - Semiconductive roller and production method therefor (2017-01-10),

9. 9274460 - Semiconductive roller, charging roller and electrophotographic apparatus (2016-03-01),

10. 9064617 - Electrically conductive rubber composition, developing roller, and image forming apparatus (2015-06-23),

11. 8882646 - Semiconductive roller, charging roller and electrophotographic apparatus (2014-11-11),

12. 8277692 - Semiconductive rubber composition and semiconductive rubber roller employing the same (2012-10-02),

13. 7744781 - Conductive thermoplastic elastomer composition, method of producing same, and molding (2010-06-29),

14. 7728060 - Conductive roller of rubber, thermoplastics, EO-PO-glycidyl ether, fluoro and sulfonyl anion salt and microcapsule (2010-06-01),

15. 6572307 - Fender with step and/or projection (2003-06-03),

Title: Kei Tajima: Innovator in Medical Rubber Technologies

Introduction

Kei Tajima is a prominent inventor based in Kobe, Japan. He has made significant contributions to the field of medical rubber technologies, holding a total of 16 patents. His innovative work focuses on improving sterilization methods and the composition of medical rubber parts.

Latest Patents

Tajima's latest patents include a sterilization method for medical rubber parts. This method involves irradiating a packaging article with gamma rays, which accommodates multiple medical rubber parts while maintaining an oxygen concentration not higher than 5%. Another notable patent is for a medical rubber composition that retains non-elution characteristics even after gamma ray sterilization. This composition includes a base polymer made from halogenated isobutylene-isoprene rubber, polyethylene, and a triazine derivative as a crosslinking agent.

Career Highlights

Kei Tajima is currently associated with Sumitomo Rubber Industries Limited, where he continues to develop innovative solutions in the medical rubber sector. His work has been instrumental in enhancing the safety and effectiveness of medical rubber products.

Collaborations

Tajima has collaborated with notable colleagues such as Yoshihisa Mizumoto and Takashi Marui. Their combined expertise has contributed to the advancement of medical rubber technologies.

Conclusion

Kei Tajima's contributions to the field of medical rubber technologies are noteworthy. His innovative patents and collaborations reflect his commitment to improving medical products and ensuring patient safety.