In Re Swan

GRAHAM, Presiding Judge.

The appellant has filed a divisional application for a claimed improvement in manifolding four-cylinder internal combustion engines. He was allowed, as we are advised, claims 1 to 8, inclusive, while claims 9, 10, 11, and 12 were rejected by the examiner and by the Board of Appeals. In this court the appellant has abandoned all of his claims except rejected claim 9, which is as follows:

“9. The combination with a four-eyclinder engine having suitable inlet ports, of a manifold having a main manifold duet level throughout its length, a straight or substantially straight…