Patent ID: 8074605

Claim:
An odor control additive for litter, comprising: a. a plurality of fragrance scented microcapsules adapted to be added to litter; b. said fragrance scented microcapsules comprising a central portion comprising a fragrance scent oil that is encapsulated in a microcapsule cell wall, said fragrance scent oil is in the form of a liquid, semi-solid or solid; c. said fragrant scent oil having vapors at room temperature that have a vapor pressure exceeding one atmosphere pressure; d. said microcapsule cell wall being impervious to vapors of said fragrant scent oil; e. said fragrance scent oil comprises odor masking compound; f. said microcapsule containing fragrant scent oil has a linear dimension of about 1000 to 5000 microns; and g. said microcapsule cell wall has a thickness of about 25 to 250 microns; whereby said fragrance scent microcapsules are operative to break under the weight of a cat or other animal, or said microcapsules swell or degrade when subject to animal urine thereby releasing fragrance scent.