Patent ID: 7661392
Filing Date: 2010-02-16
Classification: A01K

Abstract:
1. A nested set of rodent containment cage bases, comprising: a plurality of rodent containment cage bases which each have a bottom and a wall or walls, which are about 75% nested or more; which are constructed of a polymer of a thickness of 0.01 inches to 0.03 inches; which each comprise at least one corner or edge in the cage base interior which is accessible to a rodent that can be contained in the cage base, and which is defined by surfaces having an angle α greater than 180 degrees and less than 360 degrees, wherein all corners or edges of the cage bases which are in the interior of the cage bases, which are accessible to a rodent that can be contained in the cage base, and which are defined by surfaces having said angle α measured in the cage base interior, have a minimum radius φ with φ=0.25/(tan((π/360)(360−α))) inches.