definiens: shall mean all inven tions, discoveries, trade secrets, information, experience, data, formulas, p rocedures and results arising solely out of the Development Program or the manufa cture, use or sale of the Licensed Products which are rightfully held by Tria ngle as of the Effective Date, or which are not Joint Know - How or Joint Inve ntions and are developed or acquired by Triangle during the period beginning on the Effective Date and ending upon termination or expiration of this Agree ment pursuant to Article 17 ; provided that, for purposes of this Section 1.42, T riangle Know - How shall include only such inventions, discoveries, trade se crets, information, experience, data, 11 formulas, procedures and results reasonably necessa ry to practice the rights and licenses granted by Triangle to Dynavax under the T riangle Patents pursuant to Section 2.4 of this Agreement . In addition, notwith standing the foregoing, Triangle Know - How shall not be deemed to include an y of the foregoing to the extent, and only for as long as, Triangle is prohib ited from disclosing the same to third parties pursuant to binding, non - cancellab le contractual nondisclosure obligations applicable to Triangle