definiens: shall mean, with respect to each of the Patent Countries, the period beginning on the date of theFirst Commercial Sale of Product in such Patent Country and ending either ( i ) for all Patent Countries taken as a group, andnot on a country - by - country basis, on the date when there is no longer any Valid Claim under the Patent Rights covering theProduct being sold in any country within the group of Patent Countries, or ( ii ) on a country - by - country basis within the groupof Patent Countries, on the date that is ten ( 10 ) years after the last day of the month in which the First Commercial Sale ofProduct in such country occurred, whichever date occurs later . With respect to each of the Non - Patent Countries, shall mean the period beginning on the date of the First Commercial Sale of Product in such Non - Patent Country andending, on a country - by - country basis within the group of Non - Patent Countries, on the date that is ten ( 10 ) years after the lastday of the month in which the First Commercial Sale of Product in such country occurred . For purposes of this Section 1.50, shall mean a Valid Claim in a Patent Right which would be infringed by the manufacture, use or sale of theProduct being sold absent a license under 7 * CONFIDENTIAL TREATMENT REQUESTED . CONFIDENTIAL PORTION HAS BEEN FILED SEPARATELY WITH THESECURITIES AND EXCHANGE COMMISSIONsuch Patent Right . The foregoing applies to royalties due on Net Sales in the Rest of Territory, in accordance withSection 5.9.2(a ) . Royalties due on Net Sales in the United States shall be paid in accordance with Section 5.11.7