Under the Canadian Patent Act, the statute of limitations for claiming damages for patent infringement is strictly 6 years. The clock generally starts ticking from the exact date the act of infringement occurred, not necessarily when you discovered it.
Inventing a new product or technology takes immense effort, time, and money. When you hold a valid Canadian patent, you have the exclusive right to make, use, and sell your invention across the country. However, if a competitor copies your patented technology, the Canadian government will not automatically enforce your rights for you. You must take proactive legal action. ⚔
A critical rule to understand is the statute of limitations, which acts as a legal countdown timer. If you wait too long to file a lawsuit, you lose your right to seek financial compensation for the infringement. Navigating this federal legislation can be highly complex, which is why it is strongly recommended to hire a Canadian intellectual property lawyer from our directory to protect your hard-earned assets.
Step-by-Step Process for Handling Patent Infringement in Canada
Addressing patent infringement requires a strategic approach. While patents are federal and governed by the Patent Act, the process almost always takes place in the Federal Court of Canada, whether you live in Vancouver, Toronto, or Halifax.
Step 1: Identifying the Infringement
First, you must identify that an individual or corporation is using your patented claims without permission. This often involves reverse-engineering a competitor’s product. Under Canadian law, you can only claim damages for infringements that happened within the past 6 years. Older infringements are generally “statute-barred,” meaning they cannot be financially compensated.
Step 2: Understanding Discoverability
In some areas of Canadian civil law, the “discoverability principle” delays the limitation clock until you actually notice the harm. However, in Canadian patent law, the 6-year rule is typically hard-capped from the date the infringing act itself took place. A skilled law firm can help you determine the exact legal timeline of your specific case.
Step 3: Gathering Solid Evidence
Before making accusations, you need proof. Purchase the infringing item, save promotional materials, and document the seller’s activities. Keep detailed records of dates and locations to prove the infringement occurred within Canada and within the 6-year window.
Step 4: Sending a Cease and Desist Letter
Many patent disputes are resolved without a trial. Your lawyer will generally draft a formal Cease and Desist (C&D) letter. This document warns the infringing party of your patent rights and demands they stop their activities or negotiate a licensing agreement to avoid court.
Step 5: Filing a Statement of Claim
If the competitor ignores the warning, your next step is filing a Statement of Claim at the Federal Court. 📂 This officially pauses the limitation period clock for any future dates and launches your formal legal action to seek damages and an injunction (an order to stop production).
How Much Does it Cost in Canada?
Enforcing a patent is one of the most expensive legal actions in Canada. Here is a breakdown of what you might expect to pay in CAD:
- Federal Court Filing Fees: The basic court registry fee to start a claim is currently around $50 to $150 CAD.
- Patent Agent / Expert Fees: Hiring technical experts to prove the infringement often costs $5,000 to $15,000 CAD.
- Cease and Desist Letter: Having a law firm draft and send a formal letter typically ranges from $1,000 to $2,500 CAD.
- Full Litigation (Lawyer Fees): If the case goes to a full trial, legal fees can easily exceed $100,000 to $250,000+ CAD depending on complexity.
| Expense Category | Estimated Cost (CAD) | Frequency |
|---|---|---|
| Court Filing Fee | $50 – $150 | One-time |
| Cease & Desist Letter | $1,000 – $2,500 | One-time |
| Expert Witnesses | $5,000+ | Per Expert |
| Lawyer Retainer | $10,000 – $30,000 | Upfront deposit |
How Long Does the Process Take?
You have exactly 6 years to file your lawsuit from the date of the infringement. Once you file your Statement of Claim at the Federal Court, a typical patent litigation lawsuit takes roughly 2 to 4 years to reach a final trial decision, assuming it is not settled out of court beforehand. Complex pharmaceutical or tech patents can take even longer.
Frequently Asked Questions (FAQ)
Can I sue for infringement before my patent is officially granted?
You cannot formally sue until the patent is officially granted. However, under the Patent Act, you may be entitled to “reasonable compensation” for any infringement that occurred between the date your patent application was published and the date it was finally granted.
Does the limitation period vary by province?
No. Patents are a matter of federal jurisdiction in Canada. The 6-year limitation period under the Patent Act applies consistently whether the infringement happened in Alberta, Ontario, or Quebec.
What happens if I discover the infringement 7 years later?
If the infringement ended 7 years ago, you are generally statute-barred from claiming damages. However, if the infringement has been continuous and is still happening today, you can typically sue, but you will only recover damages for the most recent 6 years.
What is an injunction?
An injunction is a court order demanding the infringing party to immediately stop making, selling, or using your patented invention. It is usually the primary goal of patent litigation alongside financial compensation.
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