| 发明名称 |
Panel for a screen |
| 摘要 |
A panel for a screen, said panel comprising a plurality of groups of perforations, each group comprising six generally equal triangular apertures (513, 514, 515) arranged with their apices facing a central portion (550), wherein the apices of two (514, 515) opposing ones of said triangular apertures are spaced apart further than the apices of opposed ones of the remaining triangular apertures (513, 513; 513, 513). <IMAGE> |
| 申请公布号 |
EP1002588(B1) |
申请公布日期 |
2004.01.02 |
| 申请号 |
EP20000103595 |
申请日期 |
1997.02.12 |
| 申请人 |
VARCO I/P, INC. |
发明人 |
ADAMS, THOMAS COLE;SCHULTE, DAVID LEE JR.;GRICHAR, CHARLES NEWTON;LEONE, VINCENT DOMINICK SR.;WALKER, JEFFREY EARL;SEYFFERT, KENNETH WAYNE;MCCLUNG, GUY LAMONT III |
| 分类号 |
B01D29/01;B01D29/07;B01D33/00;B01D33/01;B01D33/03;B07B1/46;B07B1/48;E21B21/06 |
主分类号 |
B01D29/01 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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