Advanced Refrigerant Technologies, LLC is solely owned and operated by M. Ray Coker. A retired IBM aerospace engineer for NASA, Ray has been in the HVAC business since the mid - 1960's in both the Houston ~ Clear Lake and Austin areas. Ray participated in the development of EPA Clean Air Standards for reclamation work. After a brief retirement, Ray is back and operating the new company with the high standards and work ethics that he is well known for in this industry. We would like to work for you. M. Ray Coker - Owner & Manager, Cellular 832-452-1228, Richard G. Coker - Technical Manager, Cellular 832-452-1417, Cathleen M. Smith - Office Manager, Office 281-338-2179, Fax 281-338-5037.\r\n\r\n