This inventor holds 3 USPTO granted patents. Top assignee: Bridgestone Corporation. Active years: 2002-2010.
Location History:
- Kodaira, JP (2002)
- Tokyo, JP (2003 - 2010)
Company Filing History:
Years Active: 2002-2010
Title: Nobumitsu Ohshima: Innovator in Rubber Composition and Reclaimed Rubber Technology
Introduction
Nobumitsu Ohshima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of rubber technology, holding a total of 3 patents. His work focuses on enhancing the physical properties of rubber compositions and developing processes for producing reclaimed rubber.
Latest Patents
Ohshima's latest patents include innovative advancements in rubber composition. One of his notable inventions is a rubber composition that exhibits a high hysteresis loss without compromising other physical properties, such as fracture characteristics. This composition consists of 100 parts by weight of a rubber component, 0.1 to 100 parts by weight of graphitized carbon material, and a lipid in a specific ratio. The preferred graphitized carbon material is carbon fiber grown from a vapor phase or graphitized carbon black, while the lipid is identified as a fatty acid. This invention aims to achieve a loss tangent tan δ in the range of 0.05 to 0.5 at a temperature of 60 degrees Celsius after vulcanization.
Another significant patent by Ohshima involves the development of reclaimed rubber obtained through a devulcanization process. This reclaimed rubber demonstrates excellent physical properties as a vulcanized material. The process ensures that the proportion of sol is 80% or higher, with the peak top molecular weight of sol being 100,000 or less, as determined by gel permeation chromatography (GPC).
Career Highlights
Nobumitsu Ohshima is associated with Bridgestone Corporation, a leading company in the tire and rubber industry. His work at Bridgestone has allowed him to contribute to advancements in rubber technology, enhancing the performance and sustainability of rubber products.
Collaborations
Ohshima has collaborated with notable coworkers, including Jingo Shirasaka and Ryuji Izumoto. Their combined expertise has fostered innovation and development in the field of rubber technology.
Conclusion
Nobumitsu Ohshima's contributions to rubber composition and reclaimed rubber technology highlight his role as an influential inventor. His patents reflect a commitment to improving the physical properties of rubber materials, showcasing the potential for innovation in this field.