COLUMBIA, Md., Nov. 15 /PRNewswire/ -- U.S. Foodservice announced today that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act with respect to the acquisition of Alliant Exchange Inc. expired on November 14, 2001, without any action by the Federal Trade Commission. Alliant Exchange is the parent company of Alliant Foodservice, Inc. a leading distributor in the growing foodservice market in the United States.