Samuel Blatchford

“ This is true, although the United States patent runs, on its face, for seventeen years from its date, and is not, on its face, so limited as to expire at the same time with the foreign patent; it not being necessary that the United States patent should, on its face, be limited in duration to the duration of the foreign patent. ”

“ That the words 'first patented or caused to be patented in a foreign country' do not mean 'first patented or caused to be patented' before the issuing, or granting, or date, of the United States patent, but mean 'first patented or caused to be patented' before the date of the application for the United States patent ”

“ Patents of invention issued by the patent-office shall be valied for a period of five, ten, or fifteen years, at the option of the applicant, but at or before the expiration of the said five or ten years the holder thereof may obtain an extension of the patent for another period of five years, and after those second five years may again obtain a further extension for another period of five years, not in any case to exceed a total period of fifteen years in all ”