Regeneron Enforcement. Regeneron shall have the sole right to enforce the Regeneron Patents ​. Regeneron shall not have any right to enforce any CytomX Patent. Regeneron shall at all times keep CytomX informed ​. Regeneron may, at its own expense,

CytomX Enforcement. CytomX shall have the sole right to enforce the CytomX Patents at its sole cost. CytomX shall not have any right to enforce any Regeneron Patent or Collaboration Patent. CytomX shall at all times keep Regeneron informed as to the status of such enforcement pursuant to this [Section 8.7.2]. CytomX may, at its own expense, institute suit against any infringer or alleged infringer and control and defend such suit in a manner consistent with the terms and provisions hereof and recover any damages, awards or settlements resulting therefrom, subject to [Section 8.7.5]. Regeneron shall reasonably cooperate in any such litigation at CytomX’s expense. CytomX shall not enter into any settlement of any claim described in this [Section 8.7.2] that ​.

Regeneron Patents. Regeneron will be solely responsible, ​, for preparing, filing, prosecuting (including provisional, reissue, reexamination, continuing, divisional, continuation, continuation-in-part, and substitute applications and any foreign counterparts thereof), and maintaining all Regeneron Patents, and conducting any interferences and oppositions or similar proceedings relating to any Regeneron Patents. CytomX acknowledges and agrees that ​.