Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5626765 | Method for adsorbing and separating heavy metal elements by using a tannin adsorbent | Yoshinobu Kamei | 1997-05-06 |
| 5460791 | Method for adsorbing and separating heavy metal elements by using a tannin adsorbent and method of regenerating the adsorbent | Yoshinobu Kamei | 1995-10-24 |
| 5320664 | Method of preparing metal element adsorbent and method of adsorbing and separating metal element using the same | — | 1994-06-14 |
| 5300677 | Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin | Yoshinobu Kamei | 1994-04-05 |
| 5296629 | Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin | Yoshinobu Kamei | 1994-03-22 |
| 5276251 | Process for treating organic phosphoric acids | Yoshinobu Kamei | 1994-01-04 |
| 5274169 | Method of preparing insoluble hydrolysable tannin and method of treating waste liquid with the tannin | Yoshinobu Kamei | 1993-12-28 |
| 5158711 | Insoluble tannin preparation process, waste treatment process employing insoluble tannin and adsorption process using tannin | Yoshinobu Kamei | 1992-10-27 |
| 5104549 | Waste treatment process for alkaline waste liquid | Yoshinobu Kamei | 1992-04-14 |