definiens: shall mean, with respect to the Product and for a given country in the Territory, the period of time commencing on the date of the First Commercial Sale of the Product in such countryand ending on the later of the date that is ( a ) ten ( 10 ) years after the date of the First Commercial Sale ofthe Product in such country, or ( b ) the expiration of the last to expire Valid Claim within the LicensedCompound Patent Rights, [COMPANY] Patent Rights or Joint Patent Rights in such country Covering the use, Manufacturing, import, offering for sale, or sale of the Product in such country, ( c ) the expiration of thelast to expire Valid Claim within the Non - Compound Patent Rights in such country Covering the use, import, offering for sale, or sale of the Product in such country, or ( d ) expiration of the last to expireRegulatory Exclusivity conferred by the applicable Regulatory Authority in such country for the Product