Company Filing History:
4 out of 690 
3 out of 33 
2 out of 327 Years Active: 1997-2000
Title: Sumio Yoshida: Innovator in Polyolefin Materials
Introduction
Sumio Yoshida is a notable inventor based in Yokohama, Japan, renowned for his contributions to the field of material science, specifically in polyolefin materials. With four patents to his name, Yoshida has demonstrated a consistent commitment to innovation and research.
Latest Patents
Among his most recent inventions, Yoshida has developed a process for producing polyolefin materials that significantly enhances their mechanical properties. This patented process involves several key steps: (a) preparing a molded article of ultra-high-molecular-weight polyolefin with a viscosity-average molecular weight exceeding 500,000; (b) stretching this article by more than thirty-fold; (c) contracting the stretched article by 0.3 to 80% in the direction of stretch; and (d) re-stretching the contracted article. The result is a polyolefin material exhibiting improved mechanical strength and elasticity modulus. Another significant patent involves a prepreg made from ultra-high-molecular-weight polyethylene, characterized by a controlled stretching process and a subsequent impregnation with thermosetting resin, leading to enhanced adhesion properties.
Career Highlights
Yoshida has made impactful contributions through his work with esteemed companies, notably Nippon Oil Company and Polymer Processing Research Institute Ltd. His career is marked by a focus on the advancement of polymer technology and its practical applications in various industries.
Collaborations
Throughout his career, Yoshida has collaborated with talented professionals, including Kazuhiko Kurihara and Hiroshi Yazawa. These collaborations have fostered innovation and have led to the successful development of various advanced materials and technologies.
Conclusion
Sumio Yoshida stands out as a pioneering inventor in the realm of polyolefin materials, with a notable portfolio of patents that enhance the functionality of these materials. His dedication to research and innovation continues to inspire advancements in material science, reinforcing the importance of intellectual property in driving technological progress.