definiens: means, on a Licensed Product - by - Licensed Product and country - by - country basis, the period of timebeginning on the First Commercial Sale of a Licensed Product in a country and ending on the latest of ( a ) the expiration, invalidation, revocation, cancellation, or abandonment date of the last Caribou Patent that includes a Valid Claim that claims ( i ) the Collaboration CAR - TProduct in such Licensed Product, or ( ii ) the method of making the Collaboration CAR - T Product in such Licensed Product which method isused in the Manufacture of such Licensed Product for commercial sales ( in the case of ( ii ), only for so long as no Biosimilar Product iscommercially available in such country ), in such country [ * * * ] ; ( b ) ten ( 10 ) years from First Commercial Sale of such Licensed Product in suchcountry ; and ( c ) expiration of Regulatory Exclusivity for such Licensed Product in such country