Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9321863 | Polyvinyl sulfonic acid, production method thereof, and use thereof | Hidenobu Higashi, Hidenori Okuzaki | 2016-04-26 |
| 9072983 | Vinyl sulfonic acid, polymer thereof, and production method thereof | Takehiko Miyai, Kazuhiko Isshiki | 2015-07-07 |
| 8299294 | Process for producing vinyl sulfonic acid | Takehiko Miyai | 2012-10-30 |