This inventor holds 9 USPTO granted patents. Top assignees: Toray Industries, Inc., Other. Active years: 1976-2005.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Kamakura, JA (1976)
- Zushi, JP (1980 - 2005)
Company Filing History:
8 out of 3,586 
1 out of 834,601 Years Active: 1976-2005
Title: Hiroji Ohigashi: Innovator in Ferroelectric Polymer Technology
Introduction
Hiroji Ohigashi is a prominent inventor based in Zushi, Japan. He has made significant contributions to the field of polymer technology, particularly in the development of ferroelectric materials. With a total of 9 patents to his name, Ohigashi's work has had a substantial impact on various applications, including ultrasonic transducers.
Latest Patents
One of his latest patents is a method for fabricating a ferroelectric polymer film. This innovative process involves uniaxially drawing a film made of a vinylidene-trifluoroethylene or tetrafluoroethylene copolymer. The film is then thermally treated at a temperature within the range of the Curie temperature through the melting point of the copolymer for five hours or more. This treatment diffuses the molecular chains along the orientation direction, effectively removing the intertwining between the chains. Another notable patent is for a piezoelectric polymeric material, which is essential for ultrasonic transducers. This material consists of a copolymer of about 65 to 82 mol percent of vinylidene fluoride and about 35 to 18 mol percent of ethylene trifluoride. The polymer is formed into a film and heat-treated to produce a film with a thickness extensional electromechanical coupling factor of at least 0.05, and preferably greater than 0.2.
Career Highlights
Throughout his career, Hiroji Ohigashi has worked with several notable companies, including Toray Industries, Inc. His expertise in polymer technology has positioned him as a key figure in the development of advanced materials.
Collaborations
Ohigashi has collaborated with esteemed colleagues such as Toshiharu Nakanishi and Miyo Suzuki. Their combined efforts have contributed to the advancement of polymer science and technology.
Conclusion
Hiroji Ohigashi's innovative work in ferroelectric polymer technology has led to significant advancements in the field. His contributions continue to influence various applications, showcasing the importance of his research and inventions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile