Toyonaka, Japan

Ryohei Tsuyama

This inventor holds 1 USPTO granted patent. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1976.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryohei Tsuyama. Retrieved from https://idiyas.com/inventor/ryohei-tsuyama

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 1

Forward Citations = 19(Granted Patents)


Company Filing History:


Years Active: 1976

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1 patent (USPTO):Explore Patents

Title: Ryohei Tsuyama: Innovator in Rubber Adhesion Technology

Introduction

Ryohei Tsuyama is a notable inventor based in Toyonaka, Japan. He has made significant contributions to the field of rubber technology, particularly in the adhesion of rubber to reinforcing materials. His innovative work has led to advancements that benefit various industries.

Latest Patents

Ryohei Tsuyama holds a patent for a vulcanizable rubber composition that enhances the adhesion of rubber to reinforcing materials. The patent describes a composition comprising a rubber component, a formaldehyde-donor, and a formaldehyde-acceptor in a specific weight ratio of 100:0.1-10:0.1-10. The formaldehyde-donor is a methylolmelamine condensate, while the formaldehyde-acceptor is resorcinol or its reaction product with formaldehyde. This invention is particularly useful for achieving excellent adhesion during the vulcanization process.

Career Highlights

Ryohei Tsuyama is associated with Sumitomo Chemical Company, Limited, where he has been able to apply his expertise in rubber technology. His work has not only contributed to the company's portfolio but has also advanced the industry standards for rubber adhesion.

Collaborations

Throughout his career, Ryohei has collaborated with esteemed colleagues such as Masahiko Harada and Syozo Tanimura. These collaborations have fostered a productive environment for innovation and development in their field.

Conclusion

Ryohei Tsuyama's contributions to rubber adhesion technology exemplify the impact of innovative thinking in industrial applications. His patent and work at Sumitomo Chemical Company, Limited, highlight the importance of advancements in material science.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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