Application of Phil H. Hidy and William F. Phillips

SMITH, Judge.

Cycloserine, a water-soluble antibiotic is produced by bacterial cultivation on a nutrient medium. It is “amphoteric,” by which is meant “a substance having both acid and basic properties.” Haekh’s Chemical Dictionary (3rd Ed.) Such a substance may act either as a weak acid or a weak base.

Appealed claims 2, 5, 6, 7 and 8 of appellants’ application Ser. No. 487,704, filed Feb. 11, 1955, relate to the “Recovery of Cycloserine” from aqueous solutions. Claim 2 is representative of the appealed claims and reads as follows:

“A process for the recovery of cycloserine from an aqueous…