Application of Walter Luttrell Graf

MARTIN, Judge.

Appellant filed an application serial No. 112,160 on May 15, 1961 for an improvement in the process of spinning hollow filament viscose yarns, which application was a continuation-in-part of an application serial No. 834,673 filed August 19, 1959. The board sustained the examiner’s final rejection of all the claims in the case, process claims 1-7, as obvious variations of a combination of two references. That adverse decision is the subject of this appeal.

As appellant discloses, it is well known in the art to produce hollow rayon filaments by extruding a viscose 1 solution…