Fish raising
US4030450A · kind A · utility
32Cited by
6References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jul 3, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A40/81
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Raising food fish utilizing apparatus including a fish tank, a biological trickling filter mounted above it and a particulate filter above the trickling filter, by recirculating water from the fish tank first through the particulate filter to remove particulate matter and adjust pH of the water and refrigerate it and then through the trickling filter to remove ammonia and add oxygen, the water in the fish tank being circulated and the fish periodically being fed over a period of months until they reach marketable size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.