This class includes:
Processes for the recovery or treatment of natural occurringmineral oil which result in the production of a purified or modifiedmineral oil or of coke.
Mineral oil products of the above processes or mixtures thereofwhich include only mineral oil components.
Processes for the recovery of oily liquid or tar-like hydrocarbonaceousmaterial from a solid mineral source.
See References to Other Classes, below, that reference apparatus