This inventor holds 1 USPTO granted patent. Top assignees: Chiyoda Corporation, Nippon Steel Chemical Co., Ltd.. Active years: 1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 176 
1 out of 173 Years Active: 1994
Title: Kiyoshi Hashimoto: Innovator in Bisphenol A Production
Introduction
Kiyoshi Hashimoto is a notable inventor based in Kitakyushu, Japan. He is recognized for his contributions to the chemical industry, particularly in the production of bisphenol A, a key raw material in the manufacture of polycarbonates.
Latest Patents
Hashimoto holds a patent for a process that enhances the heat stability of bisphenol A. This innovative process involves heat-treating bisphenol A containing minimal impurities in a molten state at temperatures ranging from 185 to 220 degrees Celsius for a duration of 5 to 60 minutes in an oxygen-free atmosphere. The result is bisphenol A with improved heat stability and reduced coloration when heated, making it particularly suitable for applications where color quality is critical.
Career Highlights
Throughout his career, Kiyoshi Hashimoto has worked with prominent companies in the chemical sector, including Nippon Steel Chemical Co., Ltd. and Chiyoda Corporation. His expertise in chemical processes has significantly contributed to advancements in the industry.
Collaborations
Hashimoto has collaborated with esteemed colleagues such as Toshihiko Furukawa and Katsuhiko Sakura, further enhancing the impact of his work in the field.
Conclusion
Kiyoshi Hashimoto's innovative approach to bisphenol A production exemplifies the importance of advancements in chemical processes. His contributions continue to influence the manufacturing of high-quality polycarbonates.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile