PCT National Phase in Canada: 7 Essential Steps

You filed a PCT application, the clock is running, and Canada is on your list. Here is the part that trips up a lot of US filers: Canada is not party to the European Patent Convention, so there is no shortcut of validating a European patent here. Reaching Canada means entering the PCT national phase in Canada directly at the Canadian Intellectual Property Office (CIPO) — or filing a regular national application. Miss one date and the door can close for good. This guide walks the seven steps that actually decide whether your Canadian rights survive.

How the PCT National Phase in Canada Works

There is no regional patent for North America. Unlike an EPC member state, where a granted European patent is simply validated, Canada has to be entered on its own. A Patent Cooperation Treaty application becomes a Canadian application when you complete national entry at the Canadian Intellectual Property Office and pay the national fee. From that point it is examined under the Canadian Patent Act and Patent Rules like any domestic filing.

That single fact changes your strategy. You cannot lean on an EPO grant to cover Canada, and you cannot wait for a European decision to carry over. The Canadian file stands alone, with its own deadlines, its own examiner, and its own fee schedule. Treating it like a European validation is the most common and most expensive mistake we see.

There is also no utility model in Canada. A granted patent is the only substantive protection on offer, which raises the stakes on getting national entry and examination right the first time. Everything that follows assumes you want a full examined patent, because that is the only product CIPO sells.

Step 1: Hit the 30-Month Deadline (and Know the 42-Month Lifeline)

The core deadline is 30 months from your earliest priority date. File national entry and pay the national fee by then and you are in as of right.

Miss it and you are not necessarily finished. Canada allows late entry up to 42 months from the priority date, but the rules tightened on 30 October 2019. Late entry now requires that you pay the national fee plus a late fee and submit a statement that the failure to meet the 30-month deadline was unintentional. CIPO can ask for more information to support that statement, so it is not a rubber stamp.

The hard stop is 42 months. There is no discretion beyond it. Plan to enter at 30 months and treat the extra window as an emergency ramp, not a filing strategy.

Why the change matters: before 30 October 2019, late entry up to 42 months was available as of right, with only a fee. Many foreign filers still operate on that outdated assumption. The current rule turns the late window into a reinstatement-style process that CIPO can scrutinize, so the safe planning date is firmly 30 months from your earliest priority claim. If you are coordinating entries across several countries, the WIPO national-phase guidance is a useful cross-check on each office’s deadline.

Step 2: Get the Language and Translation Right

Canada is officially bilingual, and a patent application can proceed in either English or French. The language has to be consistent throughout the file.

If your international application was published in a language other than English or French, you must supply a translation at national entry. Most US-origin PCT filings are already in English, so no translation is needed, but double-check the publication language before you assume you are clear. A late or missing translation can delay examination and, in the worst case, affect your filing date for added matter.

Step 3: Request Examination Within Four Years

This is the step foreign applicants forget. Examination in Canada is not automatic. You have to request it and pay the examination fee, or the application is deemed abandoned.

For applications with an international filing date on or after 30 October 2019, the request for examination must be filed within four years of the international filing date. Older files kept the previous five-year window, so confirm which regime applies. There is no prescribed form; a written request and the fee are enough.

• Calendar the four-year date against the international filing date, not the priority date.
• Budget for excess-claim fees, which apply above a threshold number of claims.
• Consider the Patent Prosecution Highway if you already have allowable claims in a partner office to speed things up.

Step 4: Keep Maintenance Fees Alive From Year Two

Annual maintenance fees start early in Canada. They are due on each anniversary of the international filing date, beginning with the second anniversary, and they are payable whether or not the patent has granted.

If you enter the national phase after the second or third anniversary has already passed, the accrued maintenance fees come due at entry. A missed maintenance payment triggers a late-fee period and, if still unpaid, a reinstatement requirement with an unintentional statement. Small-entity applicants that qualify pay reduced fees, but misclaiming small-entity status has caused real problems in Canadian practice, so claim it only when you are confident you meet the definition.

A practical point on timing: because the fees run from the international filing date rather than the Canadian entry date, a file that enters at 30 months already has one anniversary behind it. Confirm the paid-up status at entry so a forgotten back payment does not quietly abandon the application before examination even begins. Current fee amounts change periodically, so always confirm them against CIPO’s published schedule rather than an old quote.

Step 5: Appoint a Canadian Patent Agent

Foreign applicants generally prosecute through a registered Canadian patent agent. The agent files national entry, receives CIPO correspondence, and manages the examination exchange. Getting an experienced local agent in place before the 30-month date avoids a scramble, and it is the practical equivalent of the step a US filer would take for any patent filing in Canada.

Step 6: Understand Where Canadian Disputes Are Decided

Because Canada never joined the European system, there is no Unified Patent Court option and no cross-border validation to worry about. Enforcement and validity run through the Canadian courts.

The Federal Court of Canada has national jurisdiction over both infringement and validity, and it is the only court that can order a patent expunged with effect against the world. Provincial superior courts can hear infringement claims, but not in-rem invalidity. Most serious patent litigation therefore starts in the Federal Court. If enforcement is already on your horizon, read our guide to patent litigation in Canada before you file.

Step 7: Avoid the Mistakes That Sink Canadian Entries

• Assuming a European or US grant carries over — it does not; Canada must be entered and examined on its own.
• Letting the four-year examination-request date slip because nothing prompts you — nothing will.
• Overlooking back maintenance fees when entering late in the term.
• Claiming small-entity status without meeting the definition, which can undermine the patent.
• Treating the 42-month window as routine rather than a last resort that needs an unintentional statement.

Handle those and the Canadian file is straightforward. The country rewards filers who respect its calendar and punishes those who assume it mirrors the US or Europe.

This article is general information, not legal advice; consult a qualified attorney for your situation.

File Your Canadian National Phase With Confidence

PerspireIP helps US and international applicants enter Canada cleanly — tracking the 30-month and four-year dates, coordinating translation, and wiring the file into a global docket. Explore our Canada service hub, our patent work in Ottawa, and our prior-art and litigation search in Toronto. Ready to map your deadlines? Contact us and we’ll build the calendar with you.

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