Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4430445 | Novel basic imidazolylmethylstyrene compound, its polymer, a process for the preparation thereof and a use as ion exchange resin | Kunihiko Takeda, Keishi Tada | 1984-02-07 |
| 4406870 | Method for the separation of carbon isotopes by chemical exchange method | Kunihiko Takeda, Heiichiro Obanawa | 1983-09-27 |
| 4394353 | Separation of rare earth metals using a cation exchanger | Kunihiko Takeda, Hatsuki Onitsuka, Kazuo Okuyama, Yasuki Shimamura | 1983-07-19 |
| 4376687 | Nitrogen-containing acrylic copolymer composition | Kunihiko Takeda, Akihiko Ikeda | 1983-03-15 |
| 4368175 | Ion exchange enrichment of uranium isotopes | Kunihiko Takeda, Hatsuki Onitsuka | 1983-01-11 |
| 4311799 | Novel basic cross-linked polymers | Kunihiko Takeda, Akihiko Ikeda | 1982-01-19 |
| 4302424 | Isotope separation | Norito Ogawa, Kohji Inada, Kunihiko Takeda | 1981-11-24 |
| 4285811 | Purification of formaldehyde by separation | Kunihiko Takeda, Naoki Miyata, Tatsushi Saeki, Maomi Seko | 1981-08-25 |
| 4280984 | Isotope separation | Norito Ogawa, Kohji Inada, Kunihiko Takeda | 1981-07-28 |
| 4263439 | Process for preparing pyridine bases | Kohji Noguchi, Kazuo Imamura | 1981-04-21 |
| 4255607 | Separation of C.sub.8 aromatic isomers | Kohji Inada, Motohisa Asano | 1981-03-10 |
| 4246351 | Protein adsorbent | Kunihiko Takeda, Akihiko Ikeda, Masayuki Mizuno | 1981-01-20 |
| 4239892 | Process for preparing pyridine bases | Kohji Noguchi, Kazuo Imamura | 1980-12-16 |
| 4238294 | Process for recovering heavy metal ions or heavy metal ions and halogen values from solutions comprising a lower aliphatic monocarboxylic acid | Hiroshi Takeuchi, Masatoshi Tanouchi, Tatsushi Saeki, Kazuki Ban | 1980-12-09 |
| 4230882 | Process for the production of a high purity terephthalic acid | Maomi Seko, Hiroshi Takeuchi, Masatoshi Tanouchi | 1980-10-28 |
| 4202860 | Continuous separation of uranium isotopes | Norito Ogawa, Motohisa Asano, Kazuo Okuyama | 1980-05-13 |