Okamoto; Takehiko
Patent Applications and Registrations
Patent applications and USPTO patent grants for Okamoto; Takehiko.The latest application filed is for "composite hollow fiber type separation membranes processes for the preparation thereof and their use".
- Okamoto; Takehiko - Kurashiki JP
- Okamoto; Takehiko - Kurashiki-city JP
- Okamoto; Takehiko - Ichihara JA
| Patent | Date |
|---|---|
| Composite hollow fiber type separation membranes processes for the preparation thereof and their use Grant 4,938,778 - Ohyabu , et al. July 3, 1 | 1990-07-03 |
| Polysulfone hollow fiber membrane and process for making the same Grant 4,874,522 - Okamoto , et al. October 17, 1 | 1989-10-17 |
| Composite hollow fiber-type separation membranes, processes for the preparation thereof and their use Grant 4,664,669 - Ohyabu , et al. May 12, 1 | 1987-05-12 |
| Filtration apparatus using hollow fiber membrane Grant 4,547,289 - Okano , et al. October 15, 1 | 1985-10-15 |
| Polyvinyl alcohol semi-permeable membrane and method for producing same Grant 4,279,752 - Sueoka , et al. July 21, 1 | 1981-07-21 |
| Reaction product of naphthenic acids useful as insulating oil Grant 3,909,435 - Koga , et al. September 30, 1 | 1975-09-30 |
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