Filter top assembly
US8151733B2 · kind B2 · utility
5Cited by
15References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01K1/031
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A filter top assembly for a cage, wherein the assembly includes a bonnet having a perforated top wall to protect filter paper placed above the top wall. The perforations may be small enough to prevent an animal from getting a purchase position and spaced apart sufficiently to prevent the animal from biting the spacing between the perforations. The bonnet may also include one or more elevated ribs to retain the filter paper suspended above the bonnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.