definiens: means, on a Licensed Product - by - Licensed Product and country - by - country basis, the period commencing upon the First Commercial Sale of a Licensed Product and ending upon thelater to occur of ( ( a ) and ( b ) ): ( a ) the later of : ( i ) the date of expiration of the last Valid Patent Claim of the MTI Patent Rights that would beinfringed by the Manufacture or Commercialization of such Licensed Product in such country, if notfor the licenses granted hereunder ; and ( ii ) the date of expiration of the first to expire Valid Patent Claim of the Product Patent Rightsclaiming the composition of matter of the ADC contained in such Licensed Product ; and ( b ) ten ( 10 ) years after the First Commercial Sale of the Licensed Product ; provided, that, notwithstanding the foregoing and for purposes of this definition of Royalty Term andSection 7.5.1(g ) and 7.5.2(h ) only, any MTI Patent Right that claims Excluded MTI Conjugation Know - How shall bedeemed to be a Product Patent Right and not an MTI Patent Right