The development of an economical process for recycling used tires will alleviate the disposal program of the scrap tires. Vulcanized rubber, because of its three-dimensional structure, cannot flow into the manufacturing processes, therefore limiting the scope of recycling used tires. Devulcanization technology was investigated in order to develop a feasible process to minimize the stockpiles of waste tires. This process induces the cleavage of the cross-linked networks in the tire structure through the combinational methods of ultrasonic and chemical devulcanization. The products from devulcanized tires are the major original components of tires. Rubber, carbon black, and extended oil were the main materials recovered, and sulfur was separated out in this technology. These recovered materials have many applications as reusable materials for the manufacturing sector.