Patent ID: 7281525

Claim:
A family of canisters including at least two canisters that are adapted to filter a flow of fluid from a source, each canister comprising: a first portion defining a first perimeter and a first area that are common to all canisters of the family; a second portion defining a second perimeter and a second area that are common to all canisters of the family; a cover portion defining a third perimeter and a third area that are common to all canisters of the family; a first connector coupled to the first portion and adapted to provide fluid communication between the source and the first portion; and a body portion cooperating with the first portion, the second portion, and the cover portion to define an interior space having a volume, a characteristic dimension, and a characteristic length, wherein the volume of each canister of the family is different and the ratio of the characteristic length to characteristic dimension of each of the canisters is between about 1.5 and 5.