This invention relates to a process of cleaning a surface soiled with a staining agent. The method includes the steps of applying to the soiled surface a highly cross-linked macroporous hydrophobic copolymer which contains a chemical entrapped therein which is a solvent for the staining agent present...http://www.google.com.au/patents/US5037485?utm_source=gb-gplus-sharePatent US5037485 - Method of cleaning surfaces
