| PATENT ASSIGNEE'S COUNTRY | Germany |
| UPDATE | 08.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Anodized metal is contacted for 0.5 - 2 min per micrometer of anodized coat. thickness with aq soln at T = 75C - boil. T & pH 5.5 - 8.5 & comprising - Alkali metal ions (0.0001 - 5 g/l) - Cyclic polycarboxylic acids (0.0005 - 0.5 g/l) having 3 - 6 -COOH groups The aq soln contg larger quantity of metal ions than is required for complete neutralization of the acids |
| PATENT PHOTOCOPY | Available on request |
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