Company Filing History:
2 out of 1,297 
1 out of 48 
1 out of 5 Years Active: 1978-1982
Title: Shigeyasu Ohashi: Innovator in Membrane Filtration Technology
Introduction
Shigeyasu Ohashi is a notable inventor based in Moriyama, Japan. He has made significant contributions to the field of membrane filtration technology, holding a total of 3 patents. His work focuses on the development of hollow fiber membranes that enhance filtration processes.
Latest Patents
Ohashi's latest patents include innovations in membrane filtration type hollow fibers. One of his inventions concerns a membrane filtration type hollow fiber composed of a single material phase, specifically a chain high polymer. This material is capable of forming fibers through the spinning of the high polymer. The cylindrical wall of the hollow fiber features a three-dimensional net-like structure with fine filtering passages ranging from 0.05 to 1 micron, ideally between 0.1 to 1 micron. This design ensures an effective and active filtering zone, with a pore rate of at least 55%. The active points of the filtering passages are randomly distributed throughout the active zone, allowing for nearly uniform sizes of the passages for solids in the filtering liquor.
Another patent by Ohashi also focuses on a membrane filtration type hollow fiber, utilizing cellulose acetate as the high polymer. Similar to his previous invention, this hollow fiber's cylindrical wall comprises a three-dimensional net-like structure of fine filtering passages. The effective filtering zone is maintained, with a pore rate of at least 55% and uniformly distributed active points for solids filtration.
Career Highlights
Throughout his career, Shigeyasu Ohashi has worked with prominent companies such as Asahi Kasei Kogyo and Toyo Jozo Company, Ltd. His experience in these organizations has contributed to his expertise in membrane filtration technologies.
Collaborations
Ohashi has collaborated with notable coworkers, including Yasuo Yokokawa and Tokio Nishikawa. Their joint efforts have further advanced the field of membrane filtration.
Conclusion
Shigeyasu Ohashi's innovative work in membrane filtration technology has led to significant advancements in the industry. His patents reflect a commitment to improving filtration processes through effective design and material use.
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