Patents
A patent is a government-granted right that gives the holder the exclusive authority to make, use, and sell an invention for a defined period. In Canada, the term of a patent is 20 years from the earliest filing date. In exchange for that exclusivity, the invention must be fully disclosed to the public — that is the bargain at the heart of the patent system.
That bargain only works if the disclosure is precise. The scope of what you actually own is defined by the claims at the end of the patent, not by the description or the drawings; a patent with broad, well-supported claims is a meaningfully different asset than one with claims drafted narrowly out of caution, even where the underlying invention is identical. Getting the claim scope right, and getting the timing of filing right, are where most of the strategic value in a patent file is won or lost.
What a Patent Protects
Patents protect utilitarian subject matter — the way something works, the way it is made, or the way it is used. This includes new products, mechanical devices, chemical compositions, biological materials, processes, and methods. Computer-implemented inventions and software can be patentable in Canada, subject to certain limitations. Aesthetic features — the way something looks — are not protected by a patent; that is the domain of industrial design registration.
Where an invention has both a functional dimension and a distinctive appearance, patent protection and industrial design registration are not mutually exclusive; a coffee maker's brewing mechanism might be patentable while its exterior housing is separately protectable as a registered design, and a well-built IP portfolio frequently uses both.
Patentability Requirements
To be patentable in Canada, an invention must be novel (not previously disclosed anywhere in the world), useful (functional and operative), and non-obvious (not an evident development from what was already known). It must also fall within the categories of patentable subject matter recognized under the Patent Act.
One of the most critical considerations in Canadian patent practice is the absolute novelty requirement. Any public disclosure of the invention — including by the inventor — starts a clock. In Canada, inventors have a 12-month grace period from the date of their own disclosure to file a patent application. In many other countries, no such grace period exists. Filing before any public disclosure is always the safest approach.
Canada is also a first-to-file system: the right belongs to the first applicant to file, not the first person to invent. That fact should drive the planning instinct on every new invention — the earliest filing date is the asset you are protecting, and the 12-month grace period is a safety net for a disclosure that has already happened, never a plan to rely on when a disclosure has not yet occurred.
How Patent Claims Are Read
The value of a patent lies almost entirely in its claims — the numbered statements at the end of the document that define the boundaries of the exclusive right. Canadian courts interpret those claims through a process known as purposive construction, established by the Supreme Court of Canada in Free World Trust v. Electro Sante Inc. The court identifies which elements of a claim are essential to the invention and which are not, reading the claim through the eyes of a person skilled in the relevant field, informed by the rest of the patent document.
This matters directly for both drafting and enforcement. A well-drafted claim distinguishes clearly between essential elements — the features a competitor cannot avoid without genuinely designing around the invention — and non-essential details that should not be read as limiting the claim's scope. It also matters for term: the 20-year patent term in Canada runs from the Canadian filing date, not from any earlier foreign priority date that may have been claimed, so the practical value of the term depends on when the Canadian application itself was actually filed.
The Canadian Filing Process
A Canadian patent application is examined by the Canadian Intellectual Property Office. Examination is not automatic — a request for examination must be filed within 4 years of the filing date, or the application will be deemed abandoned. Once examination begins, the Examiner reviews the application against the prior art and issues an Examiner's Report identifying any objections. The applicant responds, and the process continues until the application is either allowed or refused.
The prosecution process — from filing through to grant — typically takes 3 to 5 years, though this varies considerably depending on the technical field and the complexity of the issues raised.
An initial narrow claim scope allowed by the Examiner is not necessarily the end of the conversation. Voluntary amendments, divisional applications, and continued prosecution can all be used to pursue additional or broader claim scope where the commercial stakes justify it.
International Patent Protection
A Canadian patent protects only within Canada. If international protection is required, applications must be filed in each country or region of interest. The Patent Cooperation Treaty (PCT) provides a streamlined mechanism for filing internationally — a single PCT application can preserve rights in over 150 countries simultaneously, with national phase entry typically required within 30 months of the priority date. We coordinate foreign filings through a network of trusted international associates.
The 30-month national phase deadline can feel distant when the international application is first filed, but the decisions it forces — which countries actually matter commercially, and what budget to commit to each — are best made well before the deadline arrives, rather than in the final weeks when the options for staged or phased filing start to narrow.
Patent Infringement and Enforcement
A patent is only as valuable as the willingness and ability to enforce it. Patent infringement occurs when a third party makes, uses, or sells a patented invention without authorization within the territory of the patent. Enforcement options range from cease and desist correspondence through to Federal Court litigation. Before committing to an enforcement strategy, a careful analysis of the patent's validity and the scope of the infringement is essential.
Enforcement and validity are two sides of the same coin. A defendant facing an infringement claim will almost always look for grounds to challenge the patent's validity in response, so a self-assessment of the patent's own vulnerabilities — the same prior art landscape considered at the patentability stage — is part of any serious enforcement analysis, not an afterthought.
