 COLUMBIA, Md.--BUSINESS WIRE--Corporate Office Properties Trust COPT or the Company NYSE: OFC announced today the expiration of the previously announced cash tender offer by its operating partnership, Corporate Office Properties, L.P. the Issuer, for any and all of the Issuers outstanding 3.600 Senior Notes due 2023, CUSIP No. 22003B AG1, fully and unconditionally guaranteed by COPT the 2023 Notes, on the terms and subject to the conditions set forth in the 2023 Offer to Pur 