definiens: , as defined in Section 7.3(b ) of theClinical Diagnostics Agreement, any third person in initiating, bringing, or otherwisechallenging the validity or enforceability of, or seeking to oppose the issuance of ornarrow the issued or applied for claims, scope, or duration of, any of the claims of aCHIRON Licensed Patent in the Territory, directed to the Purpose, including, withoutlimitation, any interferences, reexaminations, or other proceedings in the U.S. Patent andTrademark Office or any other office, administration, or agency in the Territory . Further, none of the [COMPANY] Parties shall challenge the validity or enforceability of any pateotcontaining a claim within the ClllRON licensed Patents in the Territory, or asdefined in Section 7.3(b ) of the Clinical Diagnostics Agreement, a challenge by a thirdparty to the validity or enforceability of any such patent to the extent such challengecould invalidate or impair the enforceability of any claim directed to the Purpose;provided, however, that nothing in this Term Sheet amends, derogates, or changes in anyway the rights and obligations of [COMPANY] Diagnostics GmbH under the Cross LicenseAgreement on HIV ( Immunoassays ) between [COMPANY] Diagnostics GmbH, Dade Behring, Ortho Clinical Diagnostics, and [COMPANY] dated November, 2002