This inventor holds 10 USPTO granted patents and 2 published patent applications and 1 EPO patent. Top assignees: Tdk Corporation, Hirofusa Shirai & Nisshinbo Industries, Inc., Sankyo Seiki Mfg. Co., Ltd. Active years: 1987-2007.
Location History:
- Chiisagata, JP (1987 - 1991)
- Chiisagata-gun, Nagano, JP (1996 - 1997)
- Nagano, JP (1998)
- Chiisagata-Gun, JP (1999)
- Ueda-shi, Nagano JP (2007)
Company Filing History:
6 out of 8,238 
1 out of 1 
1 out of 264 
Years Active: 1987-2007
Title: Hirofusa Shirai: Innovator in Non-Toxic Chemical Processes
Introduction
Hirofusa Shirai is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of chemical engineering, particularly in developing methods for making polychlorobiphenyl non-toxic. With a total of 10 patents to his name, Shirai's work has had a substantial impact on environmental safety.
Latest Patents
One of Shirai's latest patents is a method and equipment for making polychlorobiphenyl non-toxic. This innovative process includes a first oxidation step, where polybichlorophenyl is burned, followed by a second oxidation step. In the second step, exhaust gas from the first oxidation is oxidized through contact with metallic phthalocyanines or their derivatives, along with an oxygen supply compound. The equipment designed for this process features a first furnace for burning polybichlorophenyl-containing oil with an auxiliary fuel and a second oxidation reaction unit that connects to the first furnace under seal.
Career Highlights
Throughout his career, Shirai has worked with various companies, including TDK Corporation. His expertise in chemical processes has led to advancements in making hazardous materials safer for the environment.
Collaborations
Shirai has collaborated with notable coworkers such as Kenji Hanabusa and Mutsumi Kimura. Their combined efforts have contributed to the development of innovative solutions in the field of chemical engineering.
Conclusion
Hirofusa Shirai's work in developing non-toxic chemical processes showcases his commitment to environmental safety and innovation. His contributions continue to influence the industry and promote safer practices in chemical engineering.