(under the class definition) Compositions which contain substances which contain lead or a lead compound for, or peculiar to, use in treating petroleum to "sweeten" it, or eliminate therefrom or modify sulfur or sulfur compounds therein, or chemically binding extraneous sulfur or chemically modifying extraneous sulfur compounds, or in making substances for such use.
SEE OR SEARCH CLASS
208, Mineral Oils: Processes and Products,
197+, for processes of sweetening mineral oils using lead compounds.
