Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6486281 | Process for preparing high-purity vinylpyrrolidone polymer | Keiichi Fujise, Itsuko Hamaguchi | 2002-11-26 |
| 6465592 | Process for preparing vinylpyrrolidone polymer | Keiichi Fujise, Itsuko Hamaguchi | 2002-10-15 |