Quick answer
POC and provisional for founders: use the same build work to strengthen the filing and use the filing to protect the launch. A better provisional is grounded in what actually works, and the launch dollar can do two jobs: revenue now and signal for the later filing decision.
The old question was: should I build first or file first?
That question assumed you had time between the two. AI collapsed both build time and filing cost. By the time you finish deciding, someone else can use AI to turn your public footprint into a fast draft.
Sequential versus parallel is not a strategy debate. It is the floor. You do both. The only question is how to do it without stopping engineering.
Patent What Works
The old model presented three competing demands, build, file, and sell, and asked you to choose. That model assumed the costs were high and the window was long.
| Factor | Assumption then | Reality now |
|---|---|---|
| Build cost | Months of engineering | Weeks with AI tools |
| Filing cost | $10k+ with a firm | Government filing fee plus drafting time |
| Gap between build and copy | Months | Days |
| Cost of not filing | Low (you could catch up) | High (someone else filed first) |
The old tradeoff is gone. Not filing while you build is not a budget decision. It is a risk decision. But there is a deeper reason. A better provisional is grounded in how the invention actually works in practice. Enablement requires describing how to make and use the invention (35 U.S.C. § 112(a)). A POC can strengthen that description because it reveals what is real, what is technically distinctive, and what still needs more work. It is helpful evidence for the filing and for investor conversations, not a formal legal prerequisite to file.
The cost of a provisional is not just the government fee. It is the cognitive load, and your engineer is already doing that work during POC. You are not adding a separate expense. You are capturing the same work in two forms. When capital is limited, every dollar should serve dual purpose. The engineering dollar builds the product and documents what is technically distinctive. The provisional dollar protects the one thing and enables conversation. No dollar does one thing only.
This is not parallel execution to save money. It is parallel execution that derisks your patent spend.
Every Dollar Does Two Jobs
The most misunderstood dollar is the launch dollar. Conventional advice says hide until you file, but you file before now, on the one thing that matters. So launch. Demo. Pitch. Post.
Yes, it carries risk. Public disclosure of non-moat elements can cut off patent rights on those disclosed elements in Europe, China, and Japan. That is real. But those elements are not your moat. You already protected the one thing. The disclosed elements are now market signal. If the launch shows one is more valuable, you know exactly what to file before the PCT deadline. If not, you saved the filing cost.
The launch dollar does two jobs: revenue and market signal for your PCT decision. That is not carelessness. That is strategic allocation with a clear exit. Launch freely. Accept the risk. Use the signal. Hold that piece close to your chest. Everything else is conversation, including your launch.
Keep a Running Lab Notebook
This approach has one requirement: your POC must be documentable. If your POC exists only as running code with no specs, diagrams, or written architecture, you will struggle to draft a provisional without stopping engineering.
The fix is simple: keep a running lab notebook. A markdown file of what you tried, what worked, and why it might matter. That file is the raw material your patent agent needs to draft from. If you are building seriously, you should be documenting anyway.
Statutory anchor: The provisional establishes a priority date under 35 U.S.C. § 119(e) for the disclosed subject matter. The one-year clock under § 111(b) gives you 12 months to convert to a non-provisional or abandon. MPEP 201.04 confirms the low bar: specification and drawings only. You do not need claims, oaths, or examination to plant your date.
The One-Paragraph Takeaway
Every dollar does two jobs, including your launch dollar. The disclosure risk is real, but the disclosed elements are not your moat. The launch generates revenue and market signal for your PCT decision. Hold that piece close to your chest. Everything else is conversation, including your launch.
Warning & Disclaimer
Human Authored · AI Assisted · Just being transparent
Andrew Leung is a registered patent agent and an entrepreneur. This article reflects general educational information and professional judgment about early founder patent decisions. Nothing on this website constitutes legal advice nor creates an agent-client relationship. Patent laws vary by jurisdiction and change over time. For legal advice specific to your situation, consult a registered patent attorney.
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