Building a Defensible Patent Portfolio Before First Funding

A defensible patent portfolio is often the most valuable asset a pre-revenue deep tech startup possesses. The portfolio-building strategy before first institutional funding: Provisional Patents — file provisional patent applications (where available in the jurisdiction) to establish an early priority date at low cost, buying 12 months to refine the claims before filing the full PCT application. Patent Cooperation Treaty (PCT) Route — file a PCT application within 12 months of the first filing to reserve the right to seek patent protection in 150+ countries, deferring the expensive national-phase filings for 30 months. Freedom to Operate (FTO) Analysis — commission an FTO search to identify third-party patents that the company’s technology might infringe, ideally before investors discover these risks during due diligence. Trade Secret Strategy — for know-how that cannot be reverse-engineered (manufacturing processes, algorithms, formulations), maintain trade secret protection with documented security protocols rather than filing patents (which require public disclosure). The most common pre-funding IP mistake: publishing research results (in journals or at conferences) before filing a patent application, which destroys the novelty required for patentability.