PCT Route vs Convention Route: How Should You Choose?
The right route depends less on legal fashion and more on timing, budget, certainty, and commercial geography.
The Convention Route
Under the convention route, an applicant files directly in selected foreign countries within the priority period, usually 12 months from the first patent filing. This route works well when the target countries are already known and limited.
For example, if a company knows that its only meaningful foreign market is the United States, direct convention filing in the US may be practical. There is no need to keep a long list of future countries open if the business case does not support it.
Best When Countries Are Fixed
Use convention filing when you already know where you want protection and the list is short.
Earlier Country-Level Prosecution
Direct filings can move earlier into local examination and country-specific prosecution.
Cost Is Paid Earlier
Because country filings happen within the priority year, translation and local counsel costs may arrive sooner.
The PCT Route
The PCT route is useful when the applicant wants to preserve broader international options. Instead of choosing all national filings immediately, the applicant files a PCT application and later enters selected national phases. This is often useful for startups that are still testing markets or raising capital.
The PCT route can also provide an international search report and written opinion. That feedback may help refine prosecution strategy, investor discussions, and national phase decisions.
Best When Uncertainty Is High
Use PCT when you need more time to decide which countries matter commercially.
Useful Search Feedback
The international search can reveal prior art before major national phase spending.
Defers Major Costs
PCT can shift the bigger country-by-country spending to a later stage.
A Practical Decision Rule
If you know the exact countries and they are few, consider convention filing. If you need time, investor validation, search feedback, or flexibility, evaluate PCT. The route should follow the business model, not the other way around.
How Founders Should Decide
Before choosing either route, write down the countries where you expect revenue, manufacturing, licensing, investors, or copycat risk. Then remove countries that are only attractive in theory. Patent budgets disappear quickly when every possible market is treated as essential.
Next, ask whether you need more time. If the answer is yes because fundraising, product validation, or partner discussions are still open, the PCT route may be sensible. If the answer is no because the foreign strategy is already fixed, convention filings may be more direct.
Finally, look at the invention itself. If the claims are still evolving, PCT search feedback can be useful before national phase decisions. If the invention is mature and the target jurisdiction is clear, direct filing can move the application into country-level examination sooner.
Choose the Right Filing Route
We help founders compare PCT and convention filing based on technology, budget, markets, and timing.
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