Service by Publication A petition to cancel the registrations identified below having been filed, and the notice of such proceedings sent by certified mail to registrants at their last known address having been returned by the Postal Service as undeliverable, notice is hereby given that unless the registrants listed herein, their assigns or legal representatives, shall enter an appearance within thirty days of this publication, the cancellation will proceed as in the case of default. Process & Cryogenic Services, Inc., Santa Clara, Calif., Reg. No. 775,616, for the mark "X-50", Canc. No. 25,999. Gladys I. Avard dba Sno-Hide Mfg., Co., Cardiff-By-The-Sea, Calif., Reg. No. 646,315, for the mark "SNO-HIDE ROOF SHIELD AND DESIGN", Canc. No. 25,997. Arista Corp., Concord, Calif., Reg. No. 1,119,615, for the mark "PREP", Canc. No. 25,998. Alcas Cutlery Corp., Houston, Tex., Reg. No. 349,157, for the mark "KENSINGTON K & DESIGN", Canc. No. 25,365. JEAN BROWN Technical Program Manager Trademark Trial and Appeal Board, for ROBERT M. ANDERSON Deputy Assistant Commissioner for Trademarks