Every patent ends somewhere. It gets licensed, priced in a due diligence, asserted in a dispute, or valued at exit. Those endpoints are decided far earlier than most businesses realise. They are decided at filing, in the claim architecture, at the moment subject matter eligibility is addressed. The ends dictate the journey.
This is the perspective at the heart of a new Practice Note for Thomson Reuters Practical Law, co-authored by our Director and Head of IP Solutions Mr Dixon Soh together with Kwan Chung Min of Viering, Jentschura & Partner and with the assistance of Ms Tay Theng Shuen. The Note states the law as at 1 May 2026. Eligibility is commonly written about as a doctrinal gateway that an application either clears or does not. What businesses have long known, though few have said publicly, is that eligibility shapes how a patent performs across its entire commercial life. By the time investors ask hard questions about scope and defensibility, or an acquirer prices the portfolio, corrective options are narrow and expensive. What holds up at those moments was built years before. The Note gives this commercial reality its place alongside the legal framework.
The Note grounds this in the full Singapore framework: the Patents Act, the IPOS Examination Guidelines and the new AI Supplemental Guidance, with particular focus on computer-implemented and life-sciences inventions. AI algorithms illustrate the point well. On their own they are treated as mathematical methods, and a claim only becomes patent-eligible when it is functionally limited to solving a specific technical problem.
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