Company Filing History:

13 out of 2,760

The Yokohama Rubber Co., Ltd.

patents

1 out of 598

Nippon Zeon Company, Ltd.

patents

where one patent can have more than one assignee

Years Active: 1977-1995

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5405690 - Rubber-rubber bonded composite structure (1995-04-11),

2. 5370915 - Rubber-rubber bonded composite structure (1994-12-06),

3. 5264259 - Energy absorbing structure (1993-11-23),

4. 5236030 - Pneumatic tire with inner liner of ultra high molecular weight (1993-08-17),

5. 4748168 - Rubber compositions for tire treads (1988-05-31),

6. 4396052 - Radial tire (1983-08-02),

7. 4342670 - Process for preparing rubber compositions for tire treads (1982-08-03),

8. 4323485 - Rubber compositions for tire treads having low rolling resistance (1982-04-06),

9. 4321168 - Process for preparing rubber composition for tire treads (1982-03-23),

10. 4309318 - Tread compositions for tires having low rolling resistance (1982-01-05),

11. 4026878 - Vulcanization accelerator system for rubber compositions (1977-05-31),

12. 4026877 - Vulcanization accelerator system for rubber compositions (1977-05-31),

13. 4020252 - Vulcanization accelerator system for rubber compositions (1977-04-26),

Title: The Innovations of Hiroshi Hirakawa

Introduction

Hiroshi Hirakawa is a notable inventor based in Isehara, Japan, recognized for his contributions to the field of rubber technology. With a total of 13 patents to his name, he has made significant advancements in the development of rubber-rubber bonded composite structures. His work has had a lasting impact on various industries that utilize rubber materials.

Latest Patents

Hirakawa's latest patents focus on a rubber-rubber bonded composite structure. This innovative structure consists of one unvulcanized preform made from hydrogenated acrylonitrile-butadiene rubber, combined with either methacrylic acid and zinc oxide or zinc methacrylate, along with an organic peroxide. Additionally, another unvulcanized preform is formed from a commonly used rubber composition. Both preforms are laminated together into an integrally bonded structure through vulcanization, resulting in excellent rubber-to-rubber adhesion.

Career Highlights

Throughout his career, Hirakawa has worked with prominent companies such as The Yokohama Rubber Co., Ltd. and Nippon Zeon Company, Ltd. His experience in these organizations has allowed him to refine his expertise in rubber technology and contribute to various innovative projects.

Collaborations

Hirakawa has collaborated with notable coworkers, including Asahiro Ahagon and Makoto Misawa. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the rubber industry.

Conclusion

Hiroshi Hirakawa's contributions to rubber technology through his patents and collaborations have significantly advanced the field. His innovative work continues to influence the industry and inspire future developments in rubber materials.

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