(under the class definition) Product or process in which the fuel is combined with a material which imparts improved characteristics to the fuel which it is being burned.
SEE OR SEARCH THIS CLASS, SUBCLASS:
502, or 542, for a fuel particle or product, respectively, having combustion properties improved by containing a more readily ignitable coating or impregnant
520, for a fuel product having combustion characteristics improved by holes therein.
532, for a fuel product having combustion characteristics improved by its shape.
