Zama, Japan

Yamagata Tomoyuki

This inventor holds 1 USPTO granted patent. Top assignee: Nippon Polyurethane Industry Co., Ltd.. Active years: 1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yamagata Tomoyuki. Retrieved from https://idiyas.com/inventor/yamagata-tomoyuki

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 = 4.0

ph-index = 1

Forward Citations = 7(Granted Patents)


Company Filing History:


Years Active: 1991

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1 patent (USPTO):Explore Patents

Title: Yamagata Tomoyuki: Innovator in Polyurethane Elastomers

Introduction

Yamagata Tomoyuki is a notable inventor based in Zama, Japan. He has made significant contributions to the field of polyurethane elastomers, showcasing his expertise through his innovative patent.

Latest Patents

Yamagata holds a patent for a polyurethane elastomer produced by the reaction of a polyisocyanate with an amine-type polyol and another type of polyol. The polyisocyanate used is an isocyanurate-modified hexamethylene diisocyanate. The equivalent ratio of active hydrogen to isocyanate group to be reacted ranges from 0.8 to 1.6. Additionally, the ratio of the amine-type polyol to the other type polyol is maintained between 10/90 to 100/0 by weight. This innovative approach has led to the development of a unique material with various applications.

Career Highlights

Yamagata is associated with Nippon Polyurethane Industry Co., Ltd., where he has been instrumental in advancing polyurethane technology. His work has not only contributed to the company's portfolio but has also enhanced the overall industry standards.

Collaborations

Yamagata has collaborated with notable colleagues such as Kiyofumi Murayama and Yukio Ohbuchi. Their combined efforts have fostered a creative environment that encourages innovation and development in polyurethane elastomers.

Conclusion

Yamagata Tomoyuki's contributions to the field of polyurethane elastomers exemplify his dedication to innovation. His patent and collaborative efforts highlight the importance of teamwork in advancing technology.

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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