Correcting fluid with drying indicator
US8182595B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Dec 11, 2007 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | May 9, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D10/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A correcting fluid with a colored drying indicator that includes as fluorescent dye, sodium 8-hydroxy-1,3,6-pyrenetrisulfonate and a good solvent for the fluorescent dye, in which the solubility of the fluorescent dye at 20° C. is at least equal to 0.1 g/l, and, a poor solvent for the fluorescent dye, in which the solubility of the fluorescent dye is less than or equal to 0.01 g/l at 20° C., the poor solvent being miscible with the good solvent for the fluorescent dye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.