Location History:
- Tokyo, JP (1978)
- Tanashi, JP (1980 - 1982)
Company Filing History:
3 out of 1,297 
2 out of 48 
1 out of 5 Years Active: 1978-1982
Title: Yasuo Yokokawa: Innovator in Membrane Filtration Technology
Introduction
Yasuo Yokokawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of membrane filtration technology, holding a total of 4 patents. His innovative work focuses on the development of hollow fiber membranes that enhance filtration processes.
Latest Patents
Yokokawa's latest patents include advancements 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 Yokokawa also focuses on membrane filtration type hollow fibers, utilizing materials such as cellulose acetate. Similar to his previous invention, this hollow fiber features a three-dimensional net-like structure that occupies the entire mass of the tubular wall. The effective filtering zone is characterized by a pore rate of at least 55%, ensuring efficient filtration.
Career Highlights
Throughout his career, Yasuo Yokokawa has worked with notable companies, including Asahi Kasei Kogyo and Toyo Jozo Company, Ltd. His experience in these organizations has contributed to his expertise in membrane filtration technology.
Collaborations
Yokokawa has collaborated with esteemed colleagues such as Tokio Nishikawa and Shigeyasu Ohashi. Their combined efforts have further advanced the field of membrane filtration.
Conclusion
Yasuo Yokokawa's innovative contributions to membrane filtration technology have established him as a key figure in this field. His patents reflect a commitment to enhancing filtration processes through advanced materials and designs.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.