| http://www.w3.org/ns/prov#value | - Patent US5024169 - Process to refine flyash captured from pulverized coal fired boilers and ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsThe present invention pertains to a process and apparatus for the refinement of exhaust particulate matter from a boiler or other device burning an organic fuel such as coal.
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