The dealer U.G. Gas Service had delivered the expired cyliner - the mark put on the inner side of the top handle of the cyliner was B-10 meaning the cylinder was not safe to use beyond June'10 & the delivery was made during the second week of Nov'10. When the said cylinder was taken for replacing the empty cylinder, the regulator was coming off as soon as the regulator knob was twisted to on the gas supply & then we observed that the cylinder usage date had already expired in June'10. We lodged verbal complaint to the Agency on 07.12.2010 & he replaced the cylinder.