* Dollar gains after 3-day slide (Updates prices) May 19 (Reuters) - Gold prices eased on Wednesday as the U.S. dollar ticked higher, with investors waiting for the latest round of Federal Reserve policy meeting minutes to gauge its stance on interest rates in the wake of rising inflation concerns. Having risen for four sessions to its highest since Jan. 29 at $1,874.80 per ounce on Tuesday, spot gold fell 0.2% to $1,864.51 by 1239 GMT. U.S. gold futures dipped 0.1% to $1,865.20. “The recent gains we’ve seen in gold prices were quite unexpected. The dollar was weaker indeed so that helped,” Julius Baer analyst Carsten Menke said.