RedHill Biopharma Ltd RedHill Biopharma Ltd. (NASDAQ: RDHL) Gets Two New U.S. Patents RedHill Biopharma Ltd. (NASDAQ: RDHL) disclosed that the U.S. Patent and Trademark Office (USPTO) has awarded the firm two new patents. One patent is featuring opaganib for treating Ebola virus disease, with patent protection until 2035.