This inventor holds 3 USPTO granted patents. Top assignees: Nippon Steel Chemical Co., Ltd., Nippon Steel Corporation. Active years: 1986-1994.
Location History:
- Kawasaki, JP (1986 - 1991)
- Tokyo, JP (1994)
Company Filing History:
3 out of 173 
3 out of 3,701 Years Active: 1986-1994
Title: Hirofumi Sunago: Innovator in Carbon Fiber Technology
Introduction
Hirofumi Sunago is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of carbon fiber technology, holding a total of 3 patents. His work focuses on enhancing the properties and production methods of carbon fibers, which are essential in various industrial applications.
Latest Patents
Sunago's latest patents include innovations such as high strength carbon fiber and pre-carbonized fiber. One of his notable inventions is a graphitized fiber that is heat-treated at temperatures exceeding 2300°C in an inert atmosphere. This fiber exhibits an oxidation weight reduction rate in dry air at 650°C, defined by a specific equation. Additionally, he has developed a method for producing mesophase pitch type carbon fibers, which involves melt-spinning a mesophase pitch through a specially designed nozzle. This nozzle features a degree of asymmetry that optimizes the production process.
Career Highlights
Throughout his career, Sunago has worked with reputable companies, including Nippon Steel Chemical Co., Ltd. and Nippon Steel Corporation. His experience in these organizations has allowed him to refine his expertise in carbon fiber technology and contribute to advancements in the field.
Collaborations
Sunago has collaborated with notable colleagues such as Tadao Tomioka and Yutaka Arai. These partnerships have fostered innovation and have been instrumental in the development of new technologies in carbon fiber production.
Conclusion
Hirofumi Sunago's contributions to carbon fiber technology are noteworthy, with his patents reflecting a commitment to innovation and excellence. His work continues to influence the industry and pave the way for future advancements in materials science.