This inventor holds 31 USPTO granted patents, plus 1 CIPO patent and 2 EPO patents, primarily in Tire Technology. Top assignees: Sumitomo Rubber Industries Limited, Sumitomo Electric Industries, Limited, Other. Active years: 1990-2012.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Hyogo, JP (1991 - 1997)
- Kobe, JP (1990 - 2012)
Company Filing History:


Years Active: 1990-2012
Areas of Expertise:
Title: Innovations in Rubber Technology: The Contributions of Kiyoshige Muraoka
Introduction: Kiyoshige Muraoka is a notable inventor based in Kobe, Japan, known for his significant contributions to the rubber industry. With a remarkable collection of 31 patents, Muraoka has made strides in developing new rubber compositions and enhancing the performance of pneumatic tires. His innovative approach aims to address environmental concerns while improving fuel efficiency and grip performance in tire applications.
Latest Patents: Among Muraoka's most recent inventions are two noteworthy patents focused on rubber compositions for pneumatic tires. The first patent introduces a rubber composition designed to reduce fuel consumption without compromising grip performance. This invention utilizes a biodegradable aliphatic polyester, such as polylactic acid, polycaprolactone, or polyalkylene succinate, to achieve enhanced sustainability in tire production. The second patent outlines a method for compounding modified, epoxidized natural rubber for tire treads. This process involves the modification of an epoxidized natural rubber containing a ring-opened epoxy group, which is then compounded with additional rubber and silica or carbon black to create a high-performance rubber composition suited for tire tread applications.
Career Highlights: Muraoka has contributed to the tire industry through his work at Sumitomo Rubber Industries Limited, where he has focused on developing innovative materials and processes that advance the efficacy and sustainability of tires. His expertise in rubber technology has placed him at the forefront of industry innovations, allowing him to directly impact tire performance and environmental responsibility.
Collaborations: Throughout his career, Kiyoshige Muraoka has collaborated with esteemed colleagues, including Noriko Yagi and Mamoru Uchida. These partnerships have fostered a collaborative environment that has enriched the research and development of new rubber technologies.
Conclusion: Kiyoshige Muraoka's contributions to the field of rubber technology through his numerous patents exemplify the importance of innovation in the tire industry. His focus on sustainable materials and methods is shaping the future of tires, making them more environmentally friendly while maintaining performance. As the tire industry continues to evolve, Muraoka’s work remains a crucial component of progress towards more efficient and sustainable transportation solutions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile