35 U.S.C. § 387 — Relief from prescribed time limits

An applicant’s failure to act within prescribed time limits in connection with requirements pertaining to an international design application^* may be excused as to the United States^* upon a showing satisfactory to the Director of unintentional delay and under such conditions, including a requirement for payment of the fee specified in section 41(a)(7), as may be prescribed by the Director.