Three-stage aquarium filtration
US6843909B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2004 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Apr 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W10/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A filter unit for filtering aquarium water includes a packet having porous filter walls configured for mechanical filtration of aquarium water, a filter medium within the packet, between the filter walls, configured for chemical filtration of the aquarium water, and a block of reticular material juxtaposed with the packet, the block of reticular material being configured for biological filtration of the aquarium water. The packet and the block are secured within a frame to establish an integrated unit for placement within an aquarium water filtration system in which aquarium water is passed through the packet and the block, and the frame is selectively removed from the filtration system and opened for selective removal and replacement of the packet and the block independent of one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.