molecules, however, result in rapid degradation by endonucleases in human serum. This degradation necessitates intratumoral delivery. The research being initiated under the Kortylewski SRA, among other things, is to evaluate novel chemical structures and formulations, including lipid nanoparticles, to increase the stability of siRNA-based molecules in serum to allow for systemic delivery. The research under the Kortylewski SRA is expected to be conducted over a two-year period at a cost of approximately $200,000 per year. Duet owns a non-exclusive license, as well as a right to enter into an exclusive license for any new inventions or intellectual property resulting from the research conducted under the Kortylewski SRA.
Exclusive License Agreement for CpG-STAT3ASO (DUET-02)
On June 25, 2021, Duet entered into an exclusive license agreement (the “ASO Exclusive License Agreement”) with COH pursuant to which Duet acquired from COH an exclusive license to ASO Patent Rights, which include: (i) PCT Application, Serial No. PCT/US2016/040361, filed June 30, 2016; (ii) patents, patent applications, continuations, divisional applications, and foreign equivalents that claim the same invention(s) and priority date as the foregoing, such as United States Patent Number 10,758,624; (iii) continuation-in-part applications that repeat a substantial portion of any of the foregoing applications; (iv) letters patent or the equivalent issued on any of the foregoing applications throughout the world; and (v) amendments, extensions, renewals, reissues, supplementary protection certificates, substitutions and re-examinations of any of the foregoing. Subject to the terms and conditions of the ASO Exclusive License Agreement, COH granted us an exclusive royalty-bearing right and license to commercially exploit the licensed rights in the field of therapeutics.
In connection with the ASO Exclusive License Agreement, we agreed to pay COH an upfront one-time non-refundable license fee and an additional one-time non-refundable license fee no later than December 30, 2021. On or before the tenth business day after the beginning of each license year (excluding the first license year ending December 31, 2021), we agreed to pay to COH a non-refundable license maintenance fee. Over the course of the ASO Exclusive License Agreement, we are required to attain certain diligence milestones. Upon any change of control of Duet or an affiliate of Duet that controls Duet, we agreed to pay COH a non-refundable fee. We are also required to make development milestone payments for each indication. These development milestone payments are tied to achieving certain clinical milestones and obtaining marketing approvals. In addition to the development milestone payments, sales milestone payments are payable to COH tied to achieving certain levels of annual net sales. In addition, base royalties are payable on sales subject to minimum annual royalties, including an annual license maintenance fee.
On April 19, 2022, we entered into an amendment to the ASO Exclusive License Agreement to secure a non-exclusive royalty bearing right and license to use and make derivative works of certain technical information and know how related to DUET-02. In connection with the amendment, we agreed to make a one-time non-refundable license fee payment of $25,000 to COH within five days of the effective date of the amendment.
Unless terminated earlier, the ASO Exclusive License Agreement will remain in effect, on a country-by-country basis and licensed product-by-licensed product (licensed service-by-licensed service) basis, until the parties’ royalty obligations end. The ASO Exclusive License Agreement is subject to termination upon certain events, including an uncured material breach by either party.
Exclusive License Agreement for CpG-STAT3decoy (DUET-03)
On June 25, 2021, Duet entered into an exclusive license agreement (the “Decoy Exclusive License Agreement”) with COH pursuant to which we acquired from COH an exclusive license to Decoy Patent Rights, which include: (i) United States Issued Patent Number 9,976,147, issued May 22, 2018, United States Issued Patent Number 10,829,765, issued November 10, 2020, and United States Patent Application Number 17/070,321, filed October 14, 2020; (ii) patents, patent applications, continuations, divisional applications, and foreign equivalents that claim the same invention(s) and priority date as the foregoing; (iii) continuation-in-part applications that repeat a substantial portion of any of the foregoing applications; (iv) letters patent or the equivalent issued on any of the foregoing applications throughout the world; and (v) amendments, extensions, renewals, reissues, supplementary protection certificates, substitutions and re-examinations of any of the foregoing.
The remainder of the terms and conditions of the Decoy Exclusive License Agreement are substantially the same as the ASO Exclusive License Agreement, except that the deadline dates for the diligence milestones and the date and amount to reimburse COH for patent expenses are different. We refer to the siRNA Exclusive License Agreement, ASO Exclusive License Agreement and Decoy Exclusive License Agreements collectively as the “Duet License Agreements”.