 CHICAGO, Sept. 22, 2021 PRNewswire -- Duff Phelps Utility and Infrastructure Fund Inc. NYSE: DPG, a closed-end fund advised by Duff Phelps Investment Management Co., today announced that on October 22, 2021, it will redeem all of its outstanding Floating Rate Mandatory Redeemable Preferred Shares, Series B CUSIP No. 