Method for removal of phosphate from bodies of water by topical application of phosphate scavenging compositions with a hand held, hose end sprayer
US7481939B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 7, 2005 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Mar 14, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/906
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention relates to the field of phosphate removal from a body of water, especially in pools and spas. It is an improved method of removal of phosphate from pools and spas by the topical addition with a hand held, hose end sprayer of a phosphate scavenging agent or composition, such as aluminum chlorohydrate and a suitable chemical for pH adjustment, allowing the scavenging agent or composition and phosphate to interact and for the resultant product to settle to the floor of the pool or spa. After twenty-four hours the sediment on the floor is removed by vacuuming. After a second twenty-four hour period any additional sediment that has settled to the floor is removed by repeating the vacuuming procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.