Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11530335 | Modified colloidal silica and method for producing the same, and polishing agent using the same | Keiji ASHITAKA | 2022-12-20 |
| 11518682 | Method for producing silica sol | Yusuke Kawasaki, Masaaki Ito, Jun SHINODA, Keiji ASHITAKA | 2022-12-06 |
| 11499070 | Modified colloidal silica and method for producing the same, and polishing agent using the same | Keiji ASHITAKA | 2022-11-15 |