This thesis will show how patents policies can help the commercialization of inventions in Europe. Our study is mainly based on statistical material contained in the European Patent Office's (EPO) database of published granted patents. Our study covers 407 granted patents in the field of chemistry and handling & processing in a one period year starting on 2007-12-24 and ending on 2008-12-26.Given the scope of data analysis, we found a tendency to limit the patents post (after) grant to a few states in Europe, mainly to Germany (DE), France (FR), Great Britain (GB), Italy (IT), Spain (ES), The Netherlands (NL) and Sweden (SE).