Patent ID: 7549396

Claim:
An odor control additive for litter, comprising: a. a plurality of fragrant-scented balls adapted to be added to litter; b. said fragrant-scented balls comprising a central, open-celled, porous compressible substrate and a barrier coating covering said substrate; c. said central, porous compressible substrate being saturated with a fragrance; d. said barrier coating comprising soda ash; e. said barrier coating being supported by said central porous compressible substrate; f. said barrier coating resisting fragrance degradation by urine and cat or animal excrements, whereby said fragrant-scented balls within said litter are operative to break under load in response to the weight of a cat or other animal using said litter box, thereby releasing fragrance saturated in the central porous compressible substrate and releasing soda ash for neutralizing urine acid and retarding odor development.