WITH ESTER-TYPE WAX, BITUMINOUS MATERIAL, OR TARRY RESIDUE:
(under the class definition) Subject matter including (a) a process involving the use of an ester type wax, bituminous material or tarry residue or (b) an abrading material or composition containing an ester-type wax, bituminous material, or tarry residue.
SEE OR SEARCH CLASS
208, Mineral Oils: Processes and Products,
4+, and 22+ for asphalt, tar, or pitch, per se, or a mixture thereof with another mineral oil.