US  2,708,182 <br/>
Preparation of oil soluble organic sulfonates. 

 -  May. 10, 1955 
<br/><br/> cl.252/1 
<br/><br/><label>Subjects--Local Terms: </label><br/>LUBRICATING OIL 
<br/><br/><label>Call Number: </label>US 2,708,182