George S. Gabriel,Neil E. Campbell,Chinsoo Park,Curtis Miller,Lynn Irwin,Rodney Gerringer,Dale Murray
申请号：
US12583517
公开号：
US08151733B2
申请日:
2009.08.21
申请国别(地区):
US
年份:
2012
代理人:
摘要：
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.
