definiens: shall mean, with respect to a ProposedAntigen or Collaboration Antigen ( irrespective of whether such Collaboration Antigen becomes a Discontinued Antigenor a Failed Antigen ), Patent Rights Controlled by AZ or its Affiliates that ( a ) contain a claim that covers, and only tothe extent they contain a claim that covers, Antigen - Specific Technology, and ( b ) are first Controlled by AZ or itsAffiliates after the date of the applicable Antigen Notice under Section 2.2.1(a ), 2.2.1(j ) or 2.2.1(k ), as applicable, andprior to the date of the designation of such Antigen as a Non - Selected Antigen, Failed Antigen or DiscontinuedAntigen, other than AZ Prior Antigen - Specific Patent Rights