Methods and articles for maintaining hydantoinylated polymers in a biocidally active state
US7014781B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jul 12, 2005 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | Jul 12, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/766
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A composition and the method for sustaining the biocidal activity of chlorinated polystyrene hydantoin beads. The method comprises supplying a continuous low level halogen concentration to the chlorinated polystyrene hydantoin beads in the water to be treated that flows in contact with the chlorinated polystyrene hydantoin beads, resulting in treated water suitable for drinking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.