JACKSON, Associate Judge.
This is an appeal from a decision of the Board of Appeals of the United States Patent Office affirming that of the Primary Examiner rejecting in view of the prior art all of the claims, 1 to 10, inclusive, of an application for a patent for alleged new and useful improvements in lubricating oils.
Claims 1, 9 and 10 are illustrative and read as follows:
"1. A lubricating oil comprising in combination a major portion of a hydrocarbon...
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