Inventive step
(Conclusion)
Inventive step is found.
It was possible to add a Shirasu Balloon to an alkaline solution containing a surfactant, or to change the timing of such addition to either before or after the addition of a fatty acid as is appropriate.
<Writer: Hideki Takaishi (Attorney-at-law licensed in Japan and California)>
https://www.ip.courts.go.jp/app/files/hanrei_en/673/002673.pdf