This inventor holds 7 USPTO granted patents. Top assignees: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Kanegafuchi Chemical Industry Co., Ltd.. Active years: 1992-1998.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Hyogo, JP (1992 - 1998)
- Kobe, JP (1993 - 1998)
Company Filing History:
5 out of 698 
2 out of 109 
Years Active: 1992-1998
Title: Hiroshi Fujisawa: Innovator in Isobutylene Polymer Production
Introduction
Hiroshi Fujisawa is a notable inventor based in Hyogo, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of isobutylene polymers. With a total of 7 patents to his name, Fujisawa's work focuses on environmentally friendly processes that enhance the efficiency of polymer production.
Latest Patents
Fujisawa's latest patents include a process for producing unsaturated group-terminated isobutylene polymer. This innovative process utilizes a novel halogen-free solvent system that not only produces high-quality isobutylene polymer but is also easily reusable. The invention emphasizes the use of a hydrocarbon solvent with a boiling point of not lower than 105°C and a melting point of not higher than -90°C. This approach addresses the environmental concerns associated with traditional halogenated hydrocarbon solvents, such as methylene chloride. Additionally, he has developed a process for producing isobutylene polymer that involves cationic polymerization in a solvent containing monohalogenated hydrocarbons. This method results in polymers with desirable properties while minimizing environmental impact.
Career Highlights
Fujisawa has worked with prominent companies in the chemical industry, including Kanegafuchi Kagaku Kogyo Kabushiki Kaisha and Kanegafuchi Chemical Industry Co., Ltd. His experience in these organizations has contributed to his expertise in polymer production and innovation.
Collaborations
Throughout his career, Fujisawa has collaborated with talented individuals such as Kazuya Yonezawa and Koji Noda. These partnerships have fostered a creative environment that has led to significant advancements in polymer technology.
Conclusion
Hiroshi Fujisawa's contributions to the field of isobutylene polymer production highlight his commitment to innovation and environmental sustainability. His work continues to influence the industry and pave the way for future advancements in polymer chemistry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile