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US 2012/0231986 A1Published application
Functional fluid composition
AssigneeShell Oil Company
InventorsJanet Marian Smithers, David John Wedlock
Life of this patent
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Abstract
The present invention provides a functional fluid composition comprising: a naphthenic bright stock base oil; and a Fischer-Tropsch derived base oil, wherein the functional fluid composition has a Viscosity Index (according to ASTM D 2270) of above 95.
Claims11
A functional fluid composition comprising:
- a naphthenic bright stock base oil;
- and
- a Fischer-Tropsch derived base oil,
- wherein the functional fluid composition has a Viscosity Index (according to ASTM D 2270) of above 95.
1 more element
Dependencies are inferred from the claim text.