Company Filing History:
5 out of 121 
2 out of 229 
1 out of 1 Years Active: 2001-2023
Title: The Innovative Contributions of Hirokazu Sunagawa
Introduction
Hirokazu Sunagawa, a prominent inventor based in Tokyo, Japan, has made significant contributions to the field of cellulose-based materials. With a portfolio of 8 patents, his work focuses on enhancing the properties and applications of cellulose fibers, particularly in coatings and composite sheets.
Latest Patents
Sunagawa's latest patents include a cellulose fiber-containing composition, along with a production method and film that showcase exceptional coating suitability. This innovative composition consists of cellulose fibers, measuring 1000 nm or less in width, combined with protein that includes enzymes. The formulation stipulates a protein content of 1×10 parts by mass or less relative to the cellulose fibers. Notably, when prepared at a solid concentration of 0.4% by mass, this composition exhibits a viscosity measured at 25°C, ranging from 10 mPa·s or more to 11,000 mPa·s or less.
Moreover, his patent for a composite sheet aims to provide dimensions stability when tensed, while also minimizing appearance deterioration and changes in yellowness. This sheet comprises cellulose fibers with phosphoric acid groups or derivatives, and a polyvinyl alcohol-based resin, achieving a tensile elastic modulus of 3.4 GPa or more.
Career Highlights
Throughout his career, Hirokazu Sunagawa has been associated with notable companies, including Oji Holdings Corporation and Oji Paper Co., Ltd. These experiences have greatly influenced his research and innovations in cellulose materials.
Collaborations
Sunagawa has worked alongside esteemed colleagues such as Hayato Fushimi and Koh Sakai. Their collaborations have fostered an environment for innovation and shared knowledge, propelling advancements in their respective projects.
Conclusion
Hirokazu Sunagawa's inventive spirit and dedication to improving cellulose-based materials establish him as a key figure in the field. His patents not only reflect his profound understanding of material science but also pave the way for future innovations that may enhance various applications across multiple industries. With his ongoing research and collaborative efforts, Sunagawa continues to influence the landscape of cellulose innovation in Japan and beyond.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.