definiens: means all patent applications and patents, together with any continuations, continuations - in -part, divisions, reissues, extensions, and reexamination applications of the foregoing which cover the PROCESS or manufacture, use or sale of BONE AGENT or PRODUCT in the FIELD and EXPANSION OF LICENSED FIELD in the UNITED STATES which are owned, licensed or controlled by DOW or which become owned, licensed or controlled by DOW during the life of this Agreement . The PATENTS existing for the FIELD in the UNITED STATES for the manufacture, use or sale of BONE AGENT or PRODUCT on the SIGNATURE DATE are listed in Appendix A. The PATENTS existing for the EXPANSION OF LICENSED FIELD in the UNITED STATES for the manufacture, use or sale of BONE AGENT or PRODUCT on the SIGNATURE DATE are listed in Appendix B. The PATENTS existing in the UNITE D STATES for the PROCESS on the SIGNATURE DATE hereof are listed in Appendix C. All Appendices A - C shall be amended from time to time, at CYTOGEN 's request, but no more frequently than once yearly, unless required to provide information to compute the payments due under this Agreement, Such listing shall indicate the date of last payment of any annuity and/or when the next annuity is due