definiens: means any issued [COMPANY] Patent where all the cl aims are directed to Inventions that relate solely and speci fically to ZIOPHARM Products . In the event of a dis agreement between the Parties as to whether a particular Intr exon Patent is or is not a Product - Specific Program Patent, the Parties shall seek to resolve the issue through dis cussions at the IPC, provided that if the Parties a re unable to resolve the disagreement, the issue shall be submit ted to arbitration pursuant to Section 11.2 . Any In trexon Patent that is subject to such a dispute shall be d eemed not to be a Product - Specific Program Patent u nless and until ( a ) [COMPANY] agrees in writing that such Pate nt is a Product - Specific Program Patent or ( b ) an a rbitrator or arbitration panel determines, pursuant to Article 1 1, that such [COMPANY] Patent is a Product - Specific Program Patent