657. Adulteration and misbranding of interferin. U. S. v. 3 Tabes and 3 Boxes each containing 1 Tube of Interferin. Default decrees of condemnation and destruction. ddnj00657 February 1943 Keefer Laboratories interferin November 3 and 27, 1941 Philadelphia, Pa. Chicago, Ill. Philadelphia, Pa. Eastern District of Pennsylvania 657 F. D. C. Nos. 6320, 6741. Sample Nos. 14766-E, 54630-E.