| 发明名称 |
Method of making retrochromic beads and kit thereof |
| 摘要 |
The present invention provides a method of making a plurality of intrinsically retrochromic beads. The present invention further provides a kit comprising intrinsically retrochromic beads having different retroreflective colors.
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| 申请公布号 |
US6978896(B2) |
申请公布日期 |
2005.12.27 |
| 申请号 |
US20020122527 |
申请日期 |
2002.04.11 |
| 申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
BUDD KENTON D.;FREY MATTHEW H. |
| 分类号 |
G02B5/126;G02B5/128;(IPC1-7):B65D85/00 |
主分类号 |
G02B5/126 |
| 代理机构 |
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