Section 16
SEC. 16. A certificate of registry shall remain in force for thirty years from its date, except in cases where the trade-mark is claimed for, and applied to. articles not manufactured in this country, and in which it receives protection under the laws of a foreign country for a shorter period, in which case it shall cease to have any force in this country by virtue of this Act at the time that such trade-mark ceases to be exclusive property elsewhere. At any time during the six months prior to the expiration of the term of thirty years, such registration may be renewed on the same terms and for a like period.