specially adapted to be released by contact with a liquid, e.g. for toilets

Full Title

Disinfection, sterilisation or deodorisation of air (body deodorants A61Q15/00; purifying air by respirators A62B, A62D9/00; separating dispersed particles from gases or vapours B01D45/00 - B01D51/00, B03C3/00; chemical or biological purification of waste gases B01D53/34; production of ozone C01B13/10; air-conditioning systems incorporating sterilisation F24F3/16, F24F8/20) > using gaseous or vaporous substances, e.g. ozone (A61L9/20 takes precedence ) > using substances evaporated in the air without heating > specially adapted to be released by contact with a liquid, e.g. for toilets