This inventor holds 2 USPTO granted patents and 6 published patent applications. Top assignee: Ricoh Company, Ltd.. Active years: 2024.
Company Filing History:
Years Active: 2024
Title: Innovations of Yoshimitsu Kumai
Introduction
Yoshimitsu Kumai is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of materials science, particularly in the development of innovative foam sheets. With a total of 2 patents, his work focuses on environmentally friendly materials that utilize polylactic acid.
Latest Patents
Kumai's latest patents include a foam sheet, product, formed product, and method for producing foam sheet. This foam sheet comprises a composition that includes polylactic acid, which consists of D-lactic acid and L-lactic acid. Notably, the amount of either D-lactic acid or L-lactic acid in the polylactic acid is 98 mol % or greater. Additionally, the polylactic acid constitutes 98% by mass or greater relative to the total amount of organic matter in the foam sheet. The bulk density of the foam sheet is specified to be 0.063 g/cm³ or greater but less than 0.125 g/cm³. Another patent focuses on a foamed sheet that includes polylactic acid and a filler, which has a compressive stress of 0.2 Mpa or less when the cushioning coefficient is 10 or less. Furthermore, this foamed sheet has a puncture strength of 2 N or more when the sheet thickness is 2 mm.
Career Highlights
Yoshimitsu Kumai is currently employed at Ricoh Company, Ltd., where he continues to innovate in the field of materials. His work has garnered attention for its potential applications in various industries, particularly those focused on sustainability and eco-friendly products.
Collaborations
Kumai has collaborated with notable coworkers such as Ryo Miyakoshi and Shizuka Hashida, contributing to a dynamic team that drives innovation within their projects.
Conclusion
Yoshimitsu Kumai's contributions to the field of materials science, particularly through his patents on foam sheets, highlight his commitment to developing sustainable solutions. His work at Ricoh Company, Ltd. and collaborations with talented colleagues further enhance the impact of his innovations.