Analysis of the patents granted in relation of utilizing coal refuse as a resource in China

Introduced is the trend of technical development about the patents in relation of utilizing coal refuse as a resource in China and their distribution among provinces;According to the category of international patents,the Chinese patents concentrate in the sector of modification of traditional materials and its application;main utilization of coal refuse is power generation,production of construction material and chemical products;most patents were applied by technical schools and universities,that by enterprises and individual are less and dispersing.