Defence Fortifies Patent Portfolio

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Vancouver, British Columbia--(Newsfile Corp. - January 6, 2025) - Defence Therapeutics Inc. (CSE: DTC) (OTCQB: DTCFF) (FSE: DTC) ("Defence" or the "Company"), a Canadian biopharmaceutical company developing radiopharmaceuticals and ADC products using its proprietary platform and drug delivery technologies in addition to novel immune-oncology vaccines, is pleased to announce the further strengthening of its patent portfolio with several key patent issuances and allowances in multiple jurisdictions.

Upon Defence's striking discovery that multimers based on Accum® variants may exhibit synergistic efficacy and enhanced stability when compared to their monomeric counterparts, Defence filed US patent application no. 18/318,384 (the '384 application) in May 2023, along with a request for fast-track examination by the USPTO. Defence is now thrilled to announce that the USPTO issued a Notice of Allowance on October 17, 2024, with the US patent expected to issue in early 2025 upon payment of the requisite governmental fees. The allowance of the '384 application is noteworthy for Defence's current clinical programs and business strategy on several fronts. First, the allowed application contains valuable composition-of-matter claims covering Accum®-based dimers and multimers, which cover the molecular entities ready for clinical development under Defence's flagship AccuTOX® and ARM® anti-cancer programs. The claims cover the dimers and multimers used alone or conjugated to antigens, carriers, or antibodies, the latter of which is actively being investigated by Defence for the development of novel ADCs. Second, the issuance of the US patent stemming from the '384 application will provide a long period of market exclusivity for Defence in the largest global commercial market for innovative anti-cancer therapeutics, with a projected patent expiry date in 2043. Third, the allowance by the USPTO provides validation from a major patent office of the efficacy, innovative nature, and patentability of Defence's Accum®-based dimer and multimer technology, which bodes well for the company's other national filings planning in Q3 of 2025 stemming from corresponding international (PCT) patent application no. PCT/CA2023/051758.

Defence is also pleased to announce the further strengthening of its patent portfolio covering its platform vaccine technology based on covalent conjugation of Accum® and its variants to enhance immunogenicity of vaccines. In addition to patents already secured for this technology in the United States, Canada, Australia, and Japan, Defence now adds US patent no. 12,150,989 (the '989 patent) that was issued on November 26, 2024. The '989 patent, which includes composition-of-matter coverage, extends Defence's protection of its Accum®-based immunogenicity-enhancing variants to ones based on any steroid acid. Furthermore, Defence is also pleased to disclose that the counterpart Singaporean application no. 11202304388T was recently allowed by the Singaporean Patent Office, and the Singaporean patent is expected to be granted in early 2025 upon payment of the requisite governmental fees. These positive developments demonstrate Defence's continued commitment to strengthening its intellectual property, paving the way for licensing and strategic partnerships, for example, to improve the potency of vaccines already approved or currently in development.