This inventor holds 36 USPTO granted patents and 20 published patent applications, plus 1 CIPO patent and 22 EPO patents, primarily in Fluoropolymer Production. Top assignees: Daikin Industries, Ltd., Hokkaido University, Sagami Chemical Research Center. Active years: 1991-2026.
Location History:
- Sagamihara, JP (1991)
- Tsukuba, JP (1996 - 2009)
- Osaka, JP (2016 - 2024)
Company Filing History:
35 out of 4,472 
3 out of 442 
1 out of 191 Years Active: 1991-2026
Areas of Expertise:
Title: Sumi Ishihara - Innovator in Fluoropolymer Technology
Introduction
Sumi Ishihara is a renowned inventor based in Osaka, Japan, who has made significant contributions to the field of fluoropolymer technology. With a remarkable portfolio of 29 patents, Ishihara's innovations play a crucial role in advancing materials science and engineering.
Latest Patents
Among Ishihara's latest patents is a groundbreaking process for producing aqueous fluoropolymer dispersion. This method includes a step of subjecting a pre-treatment aqueous dispersion containing a fluoropolymer, obtained by polymerization in the presence of a hydrocarbon surfactant, to ultrafiltration, microfiltration, or dialysis membrane treatment. The ultrafiltration is specifically performed using an ultrafiltration membrane with a molecular weight cutoff of 0.3×10 Da or more. Another notable patent focuses on the production method for fluoropolymer, surfactant for polymerization, and the use of surfactant. This innovative composition involves a fluoropolymer that is substantially free from specific chemical compounds, enhancing its applicability and performance.
Career Highlights
Sumi Ishihara has had a distinguished career, contributing to leading organizations such as Daikin Industries, Ltd. and the National University Corporation Hokkaido University. His work in these institutions has been pivotal in the development and commercialization of advanced polymer technologies.
Collaborations
During his professional journey, Ishihara has collaborated with esteemed colleagues, including Yosuke Kishikawa and Masahiro Higashi. Together, they have worked to push the boundaries of fluoropolymer research and application.
Conclusion
Sumi Ishihara's impressive array of patents and collaborations exemplifies his dedication to innovation within the fluoropolymer industry. His contributions not only enhance material properties but also pave the way for new applications that benefit various sectors, showcasing the importance of continuous research and development in the realm of polymers.