| 发明名称 |
LOCATABLE MAGNETIC PLASTIC DUCT AND PROCESS OF MAKING SAME |
| 摘要 |
A flexible plastic duct (10) locatable by a magnetic detecting device after the duct is buried in the ground wherein the duct is extruded from a mixture of high density polyethylene, a very low density polyethylene and finely divided particles of a permanent magnet substance such as barium ferrite. |
| 申请公布号 |
WO9208923(A1) |
申请公布日期 |
1992.05.29 |
| 申请号 |
WO1991US08458 |
申请日期 |
1991.11.13 |
| 申请人 |
TAMAQUA CABLE PRODUCTS CORPORATION |
发明人 |
LOWELL, MARK, E.;HOMA, MICHAEL, J. |
| 分类号 |
B29C47/00;F16L9/12;F16L11/12;G02B6/44 |
主分类号 |
B29C47/00 |
| 代理机构 |
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