Process for preparing a multi-grade lubricating oil and product

Claim 1

AS A NEW COMPOSITION OF MATTER A MULTI-GRADE LUBRICATING OIL WHICH IS SUBSTANTIALLY DEVOID OF ANY ADDED VISCOSITY INDEX IMPROVING MATERIAL AND COMPRISING ESSENTIALLY A MIXTURE OF HYDROGENATED HYDROCARBONS HAVING THE CHARACTERISTICS OF A MULTI-GRADE OIL SELECTED FROM THE GROUP CONSISTING OF S.A.E. 10W/20, S.A.E. 20W/30 AND S.A.E. 20W/40 MULTI-GRADE OILS, THE S.A.E. 10W/20 MULTI,GRADE OIL HAVING A V.I. OF AT LEAST 115, A VISCOSITY AT AT 0% F. OF BELOW ABOUT 12,000 S.U.S., A POUR POINT 210*F OF BETWEEN ABOUT 45 AND 58 S.U.S., A POUR POINT OF BELOW ABOUT +5*F. AND AN IODINE NUMBER BELOW ABOUT 2, AND THE S.A.E. 20W/30 MULTI-GRADE OIL HAVING A V.I. OF AT LEAST 115, A VISCOSITY AT 0*F. OF BELOW ABOUT 48,000 S.U.S., A VISCOSITY AT 210*F. OF BETWEEN ABOUT 58 AND 70 S.U.S., A POUR POINT OF BELOW ABOUT +5*F., AND AN IODINE NUMBER BELOW ABOUT 2 AND THE S.A.E. 20W/40 MULTI-GRADE OIL HAVING A V.I. OF AT LEAST 115, A VISCOSITY AT 210*F. OF BETWEEN ABOUT 70 AND 85 S.U.S., VISCOSITY AT 210*F. OF BETWEEN ABOUT 70 AND 85 S.U.S., A POUR POINT OF BELOW ABOUT +5*F. AND AN IODINE NUMBER BELOW ABOUT 2, SAID COMPOSITION BEING OBTAINED BY HYDROGENATION OF A DEASPHALTED RESIDUUM AND DISTILLATION OF THE HYDROGENATED PRODUCT TO SEPARATE A MEMBER OF THE GROUP CONSISTING OF FRACTIONS WHICH UPON BLENDING YIELD THESE S.A.E. MULTI-GRADE OILS AND FRACTIONS BLENDING THE PROPERTIES OF THESE MULTI-GRADE OILS.