(Corrects media packaging code to DUTCH BROS-IPO/) Sept 7 (Reuters) - Coffee chain Dutch Bros is aiming for a valuation of over $3.3 billion in a U.S. initial public offering, a regulatory filing showed on Tuesday. The Grants Pass, Oregon-based company plans to raise more than $421.05 million in the IPO. (Reporting by Sohini Podder in Bengaluru; Editing by Shinjini Ganguli) Our Standards: The Thomson Reuters Trust Principles.