The Indian rupee failed to maintain initial gains by slipping 15 paise to 49.36 against the US Dollar in the late morning trade on fresh dollar demand from banks and importers. The rupee resumed higher at 49.15 per dollar at the Interbank Foreign Exchange (Forex) market as against the last closing level of 49.21 per dollar. A forex dealer said that fresh dollar demand from banks mainly affected the rupee value against the dollar.Meanwhile, crude oil prices retreated in Asian trade as dealers took profits from overnight gains driven by rumours of a supply disruption in Saudi Arabia.