Loading patent…
AssigneeChevron U.S.A. Inc.
InventorsStephen J. Miller, John M. Rosenbaum
Estimating the term…
A method for improving the lubricating properties of a isomerized distillate base oil having a kinematic viscosity at 100 degrees C. between about 2.5 cSt and about 8 cSt, the method comprising blending with said isomerized distillate base oil a sufficient amount of a pour point depressing base oil blending component to reduce the pour point of the resulting base oil blend at least 3 degrees C. below the pour point of the distillate base oil wherein the pour point depressing base oil blending component is an isomerized petroleum derived base oil containing material having a boiling range above about 1050 degrees F.; also lubricating base oil blends prepared according to the process; and the pour point depressing base oil blending component.
A method for improving the lubricating properties of an isomerized distillate base oil having a kinematic viscosity at 100 degrees C. between about 2.5 cSt and about 8 cSt, the method comprising blending with said isomerized distillate base oil a sufficient amount of a pour point depressing base oil blending component to reduce the pour point of the resulting base oil blend at least 3 degrees C. below the pour point of the isomerized distillate base oil wherein the pour point depressing base oil blending component is an isomerized petroleum derived base oil containing material having a boiling range above about 1050 degrees F.
A lubricating base oil blend having a kinematic viscosity at 100 degrees C. above about 3 cSt and further containing a high boiling fraction having a boiling range above about 950 degrees C. and a low boiling fraction having a boiling range below about 950 degrees C., wherein when the high boiling fraction is distilled out the low boiling fraction has a higher pour point than the entire lubricating base oil blend.
A pour point depressing base oil blending component suitable for lowering the pour point of a base oil which comprises an isomerized petroleum derived bottoms product having an average molecular weight of at least 600 and an average degree of branching in the molecules between about 5 and about 8 alkyl-branches per 100 carbon atoms.
Dependencies are inferred from the claim text.