RegeneRx Biopharmaceuticals, Inc. (OTCQB: RGRX) ("the Company" or "RegeneRx"), a clinical-stage drug development company focused on tissue protection, repair and regeneration, today announced that it has received a Notice of Allowance from the U.S. Patent and Trademark Office (USPTO) for a Method of Achieving a Thymosin Beta 4 Concentration in a Human Patient. The patent covers treating a patient with a desired concentration of Thymosin Beta 4 (Tβ4) over a period of time, as well as treating a patient by maintaining a desired concentration of Tβ4 in a pharmacologically effective range. The patent expiry will be in late 2031, or longer depending on any extensions available from the USPTO.