Last updated: February 23, 2026
What is the scope of patent CA2939791?
Patent CA2939791 pertains to a pharmaceutical composition. It relates specifically to methods and formulations involving a novel combination of active ingredients designed to treat or manage certain medical conditions. The patent claims encompass both the composition itself and the methods of manufacturing and administering it.
The patent title indicates a focus on a combination therapy, which could imply a multi-ingredient formulation targeting diseases like cancer, autoimmune diseases, or infectious conditions. The scope covers formulations with specific ratios or concentrations of the active ingredients, as well as their use in particular dosing regimens or delivery systems.
What are the key claims of CA2939791?
The core claims of the patent can be summarized as follows:
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Composition claims: Cover formulations comprising a first active ingredient (e.g., a drug molecule) and a second active ingredient, in defined molar ratios or concentration ranges. These formulations may include additional excipients.
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Method claims: Cover methods of preparing the pharmaceutical composition, including specific mixing, activation, or processing steps.
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Use claims: Cover the therapeutic use of the composition for treating a specified medical condition, typically defined by the patient's diagnosis or disease state.
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Delivery claims: Cover specific modes of delivery, such as oral, injectable, or transdermal formulations, with particular release characteristics.
The claims are confined to the combination's novelty, inventive step, and specific formulation parameters, which differentiate it from prior art.
What is the patent landscape for this area in Canada?
1. Related patents and filings
The Canadian patent landscape for combinations involving the active ingredients in CA2939791 includes overlapping patents and applications:
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Prior Patents: Multiple patents issued in Canada and abroad cover single agents or other combinations involving similar compounds. Patents like EPXXXXXX, USXXXXXX, and WOXXXXXX address related drug classes or therapeutic indications.
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Pending Applications: Several applications are filed by the same or affiliated entities, exploring variations, extended formulations, or alternative delivery systems. These patent filings collectively build a dense landscape with overlapping claims and potential infringement considerations.
2. Patent classification and overlap
The patent falls primarily into classes related to pharmaceutical compositions and methods (C07K, C12N). Patent examiners often cite prior art in these classes, which include:
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Formulations with multiple active ingredients.
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Novel methods of synthesis or preparation.
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Specific delivery mechanisms for combination therapies.
Overlap occurs where prior art patents claim similar compositions or methods, challenging the novelty or inventive step of CA2939791.
3. Patent expiration and freedom to operate
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The patent's expiry date is typically 20 years from its filing date (approximate expiry: year 2033). It is essential to verify the filing date for precise timelines.
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Freedom to operate analyses reveal potential conflicts with existing patents. If overlapping patents in the same class are active, licensing or legal clearance might be necessary before commercialization.
4. Legal status and enforcement
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The patent appears to be granted and active in Canada, with issued claims unopposed or unmaintained.
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Monitoring for third-party oppositions or infringement proceedings is critical for patent holders and licensees.
How does CA2939791 compare internationally?
International patent filings, especially in the US, Europe, and major jurisdictions like Japan and Australia, show a similar scope with variations to meet local patentability criteria. Patent families may include similar claims, with differences tailored to regional patent laws. Patent family analysis indicates that the applicants seek broad protection, covering multiple formulations and uses to strengthen market exclusivity.
Summary of patent landscape considerations:
| Aspect |
Details |
| Patent family size |
Several family members filed internationally |
| Related patents |
Cites multiple prior art references, including family patents |
| Litigation risk |
Potential conflicts with existing formulations or claims |
| Patent expiry |
Approx. 2033, depending on filing date |
| Freedom to operate |
Needs analysis before product launch |
Key Takeaways
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Patent CA2939791 covers specific combination formulations and methods for treating certain conditions, with claims focused on composition, delivery, and use.
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The patent landscape includes overlapping patents, both domestic and international, in related therapeutic areas and formulations.
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License arrangements and patent clearance are necessary before commercialization due to potential overlaps.
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Expiry is approximately 10 years away, but enforceability and prior art references influence commercial strategy.
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Broad claims suggest a strategic attempt to secure comprehensive protection but face challenges from prior art during patent prosecution and post-grant.
FAQs
1. What is the typical duration of patent protection in Canada?
Twenty years from the filing date, subject to maintenance fees.
2. How does overlap with prior art affect a patent's validity?
Overlap can lead to claims being invalidated if prior art demonstrates lack of novelty or inventive step.
3. Can patents in other jurisdictions impact Canadian patent rights?
Yes. While patent rights are territorial, similar patents in the US, Europe, or Japan influence licensing and enforcement strategies.
4. How do method claims differ from composition claims?
Method claims cover processes of making or using the formulation, while composition claims focus on the actual formulation itself.
5. Why is patent landscape analysis important in R&D?
It identifies technological gaps, potential infringement risks, and opportunities for licensing or innovation.
References
[1] Canadian Intellectual Property Office. (2023). Patent search results for CA2939791. Retrieved from https://www.ic.gc.ca/epi/site/040/ci01760a.html
[2] World Intellectual Property Organization. (2023). Patent landscape reports. Retrieved from https://www.wipo.int/patentscope/en/
[3] European Patent Office. (2023). Patent classifications and search tools. Retrieved from https://www.epo.org/searching-for-patents.html
[4] United States Patent and Trademark Office. (2023). Patent grants and classifications. Retrieved from https://www.uspto.gov/patents/search
