Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5554792 | N-vinylformamide compositions | Kohichi Satoh | 1996-09-10 |
| 5512645 | Lactam ring containing polymer | Yasuharu Mori, Yukino Nagai | 1996-04-30 |
| 5494746 | Acrylic fiber and process for producing the same | Mitsuaki Shiraga, Hiroyshi Okada, Yukino Yamada | 1996-02-27 |
| RE34903 | Vinylamine copolymer, flocculating agent and paper strength increasing agent using the same, as well as process for producing the same | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1995-04-11 |
| 5389203 | Paper-making additives comprising cationic polymers | Kohichi Satoh, Shin Sato, Toshiaki Sakakihara | 1995-02-14 |
| RE34713 | Vinylamine copolymer flocculating agent etc. | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1994-08-30 |
| 5320712 | Method for sizing of paper | Masato Nakajima | 1994-06-14 |
| 5281340 | Cationic polymer flocculating agents | Shin Sato, Toshiaki Sakakihara | 1994-01-25 |
| 5064909 | Vinylamine copolymer, flocculating agent and paper strength increasing agent using the same, as well as process for producing the same | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1991-11-12 |
| 5037927 | Vinylamine copolymer and process for producing same | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1991-08-06 |
| 4957977 | Vinylamine copolymer, flocculating agent etc. | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1990-09-18 |
| 4824913 | Process for preparing water-soluble polymer | Yoshikazu Murao, Kohichi Satoh | 1989-04-25 |
| 4808683 | Vinylamine copolymer, flocculating agent using the same, and process for preparing the same | Takaharu Itagaki, Mitsuaki Shiraga, Kohichi Satoh | 1989-02-28 |
| 4783270 | Coagulant for minute mineral particles in suspension and method for coagulating thereof | Yoshikazu Murao, Kenji Mori | 1988-11-08 |
| 4567300 | Process for producing N-substituted formamides | Yoshikazu Murao, Kohichi Satoh | 1986-01-28 |