Oil prices slipped on Thursday after U.S. government data showed gasoline stocks and distillate inventories rose last week, although the falls were checked by continuing Middle East geopolitical tensions and a weaker U.S. dollar. U.S. July crude (CLc1) lost 42 cents to $59.50 a barrel as of 0219 ET after falling 5 cents in the previous session. Data from the U.S.