SMITH, Judge.
The Patent Office Board of Appeals affirmed the examiner's rejection of claims 1 to 4 and 6 of appellant's patent application Ser. No. 390,250 filed November 4, 1953 entitled "HYDROCARBON OILS OF REDUCED FOAMING PROPERTIES." Claims 12 and 15 of the application have been allowed.
Claim 1, illustrative of the claims on appeal, reads as follows:
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