US PATENT SUBCLASS 44 / 608
"LOW-RANK" COAL (E.G., LIGNITE, ETC.)

Current as of: June, 1999
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44 /   HD   FUEL AND RELATED COMPOSITIONS

608"LOW-RANK" COAL (E.G., LIGNITE, ETC.)

DEFINITION

Classification: 44/608

"LOW-RANK" COAL (E.G., LIGNITE, ETC.):

(under the class definition) Product or process in which a starting material is coal of less heat value than bituminous coal, including brown coal, lignite, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

490, for fuel made of peat.