| 申请日期 | 2025-06-29 | 申请号 | EP03746417 |
| 公开（公告）号 | EP1492089B1 | 公开（公告）日 | 2007-06-06 |
| 公开国别 | EP | 申请人省市代码 | 全国 |
| 申请人 | Dowa Mining Co Ltd | ||
| 简介 | The powder comprises needle-like iron oxide particles of average major-axis length in the range 20-200 nm. The powder exhibits a specific surface area measured by the BET adsorption method of 30-100 m 2>/g and the particle pH is 7 or less. An independent claim is included for a coated magnetic recording medium. | ||
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