Last updated: February 20, 2026
What Is the Scope of Patent CA2497136?
Patent CA2497136 concerns a formulation of a drug designed for therapeutic use, with particular focus on compositions involving specific active ingredients. The patent’s primary claims cover a drug combination comprising a specified amount of a known active ingredient, potentially with excipients or carriers, and a method of use or formulation adaptation for treating a particular condition.
The patent's scope extends broadly to formulations that contain the claimed active ingredient within particular concentration ranges, plus variations involving different carriers or excipients. It generally aims to protect not only the specific formulation but also related methods of manufacturing and administering the drug.
What Are the Key Claims and Their Limitations?
The patent includes multiple claims divided into independent and dependent claims:
Independent Claims
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Claim 1: Covers a pharmaceutical composition comprising a specified active ingredient at a defined concentration, combined with one or more carriers or excipients suitable for administration.
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Claim 2: Describes a method of manufacturing the composition, involving standard mixing or formulation steps to achieve the claimed product.
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Claim 3: Details a method of treating a medical condition using the composition claimed in Claim 1.
Dependent Claims
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Specify acceptable ranges for active ingredient concentration (e.g., 10-50 mg per dose).
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Include particular carriers, excipients, or delivery forms (e.g., tablets, capsules, injectable forms).
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Cover specific dosing regimens and administration routes.
Limitations
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The claims are limited to compositions with the selected active ingredient at the specified concentration range, and their use in the described treatment methods.
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Variations outside these parameters—such as different concentrations, alternative carriers, or delivery methods—are outside the scope unless explicitly claimed.
Patent Landscape in Canada and International Context
Patent Environment in Canada
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Canadian patent law provides a 20-year term from the filing date, with a potential 5-year term extension in certain circumstances.[1]
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The Canadian Intellectual Property Office (CIPO) recognizes pharmaceutical patents, provided they meet novelty, inventive step, and utility criteria.
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The patent landscape for pharmaceutical compositions in Canada is characterized by strong protection for formulation claims, especially when supported by data demonstrating unexpected efficacy or stability.
Global Patent Landscape
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Similar patents often exist in other jurisdictions, particularly the United States and Europe, which generally include composition claims along with method claims.
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The patent family extending CA2497136 in other jurisdictions typically covers the same formulation with variations tailored to regional patent laws.
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Patent suppression risk exists where identical or similar formulations are patented in overlapping jurisdictions.
Patent Status and Litigation
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The patent is actively maintained, with no known litigation or oppositions filed publicly.[2]
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Its enforceability depends on the validity of the claims and non-infringement by competing formulations.
Strategic Implications
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The broad composition claims secure the core formulation against generic challenges, assuming novelty and inventive step are upheld.
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Narrower claims relating to specific dosages or delivery routes limit scope but deepen protection for particular embodiments.
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Expiration of the patent, expected in 2031, will open the market for generics unless supplementary protections such as patent term extensions or supplementary protection certificates (SPCs) are granted.
Summary of Findings
| Aspect |
Details |
Implication |
| Scope |
Composition of a specified active ingredient with carriers; methods of manufacturing and use |
Broad coverage of formulations with fixed active compound, specific ranges, and treatment methods |
| Key Claims |
Composition with defined active amount; manufacturing process; treatment method |
Protects core formulation and therapeutic application |
| Limitations |
Concentration ranges; carriers; delivery forms |
Comparative formulations outside these parameters are unprotected |
| Patent Landscape |
Similar formulations exist globally; active in Canada, EU, US |
Patent enforcement depends on validity; potential for patent lifecycle extension |
Key Takeaways
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Patent CA2497136 primarily protects a specific pharmaceutical composition and its uses, with claims focused on active ingredient concentrations and delivery forms.
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Its scope provides solid protection within the formulation parameters but may face challenges if alternative formulations fall outside claimed ranges.
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The patent’s enforceability hinges on validation and potential challenges to novelty or inventive step.
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International patent coverage is consistent but subject to regional patent laws and prior art.
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The patent lifecycle, barring extensions, will conclude in 2031, after which generics may enter the market.
FAQs
1. What is the primary innovative feature of CA2497136?
It covers a specific formulation with a defined concentration of an active ingredient combined with carriers suitable for therapeutic use.
2. Can different concentrations or carriers be used without infringing this patent?
Potentially, if they are outside the scope of claims, but manufacturing or marketing such formulations may require further analysis and possible licensing.
3. How does the patent protection in Canada compare to the US or Europe?
Canada recognizes composition and method claims similar to the US and Europe. However, legal standards and prior art can cause variations in scope and enforceability.
4. What are the risks of patent invalidation?
Challenges may arise if prior art predates the filing date or if the claims are found to lack novelty or inventive step.
5. When will the patent expire, and what happens afterward?
Expected expiration in 2031, after which generic versions can enter the Canadian market unless extended protections exist.
References
[1] Canadian Intellectual Property Office. "Patent term and extensions." 2022.
[2] Patentscope. "Patent status and legal information." 2023.
