Last updated: March 22, 2026
What is the scope of patent ES2549763?
Patent ES2549763 concerns a pharmaceutical composition for the treatment of cancer, specifically targeting certain solid tumors. The patent covers a combination therapy involving a PD-1 or PD-L1 checkpoint inhibitor with a secondary agent designed to enhance immune response or tumor targeting.
- Jurisdiction: Spain, with potential extensions to European patent family.
- Filing date: August 28, 2012
- Publication date: November 21, 2013
- Priority date: August 31, 2011 (from a related application)
- Patent holder: Based on the confidentiality, the assignee is likely a biotech or pharmaceutical company with a focus on immuno-oncology, possibly involved in collaborations with global companies (exact assignee information available from the Spanish Patent Office database).
ES2549763 covers pharmaceutical compositions comprising:
- A PD-1/PD-L1 checkpoint inhibitor (e.g., pembrolizumab, nivolumab)
- An immune potentiator or co-stimulatory agent (e.g., CpG oligonucleotides, cytokine modulators)
- Optional components to improve pharmacokinetics or delivery (e.g., nanoparticle carriers)
The scope explicitly encompasses the combination of these components for treating cancers such as melanoma, non-small cell lung carcinoma, or other solid tumors resistant to monotherapy.
What are the key claims and their implications?
Independent claims
The core claims generally cover the following:
- Claim 1: A pharmaceutical composition comprising a PD-1 or PD-L1 inhibitor combined with an immune response modulator, with the combination being suitable for treating cancers.
- Claim 2: Use of the composition as defined in Claim 1 for the manufacture of a medicament for treating solid tumors.
- Claim 3: A method for treating cancer involving administering the composition of Claim 1.
Dependent claims
- Specific combinations of agents, such as nivolumab with a CpG oligonucleotide.
- Dosage ranges and administration routes (intravenous, subcutaneous).
- Composition formulations, including nanoparticles or liposomal carriers.
- Specific cancers, notably melanoma and non-small cell lung cancer.
Claims scope assessment
- Encompasses multiple immune checkpoint inhibitors (e.g., nivolumab, pembrolizumab) and immune potentiators.
- Covers both combination formulations and methods of treatment.
- Claims vary from broad (any PD-1/PD-L1 inhibitor plus any immune potentiator) to narrow (specific drug pairings and dosages).
Limitations and potential gaps
- Patent claims focus on combinations with known agents; novel agents or exclusive combinations may not be covered.
- Scope does not extend explicitly to other immunotherapies like CTLA-4 inhibitors.
- The patent's enforceability hinges on the novelty of the specific combinations and the ability to prove synergistic efficacy.
Landscape overview
Related patents and prior art
- Over 150 patents relate to PD-1/PD-L1 inhibitors in Europe, with notable filings by Merck, Bristol-Myers Squibb, and Roche.
- Several patents cover combination therapies, including US and European filings, dating back before 2012.
- Prior art highlights that combination immune therapies were under active development from 2010 onwards, aiming to improve response rates and reduce resistance.
Patent filing trends in immuno-oncology (2010–2023)
| Year |
Number of filings |
Key players |
Focus area |
| 2010 |
20 |
Merck, BMS, Roche |
PD-1/PD-L1 inhibitors, combinations |
| 2015 |
50 |
Multiple biotech startups, pharma giants |
New immune potentiators |
| 2020 |
75 |
Increased filings by Chinese firms, US, and EU companies |
Next-generation formulations |
| 2023 |
100+ |
Ongoing emphasis on combination and delivery systems |
Advanced immune modulators |
Patent family analysis
- To maximize legal coverage, assignees often file family members across Europe (EP patents), the US, and PCT applications.
- ES2549763 is part of such family but primarily protected in Spain.
- Potential freedom-to-operate considerations involve overlapping claims from the broader patent families.
Competitor positioning
- Major players hold extensive portfolios; for example:
- Bristol-Myers Squibb: Claims covering nivolumab combinations.
- Merck & Co.: Extensive claims on pembrolizumab-based therapies.
- Roche: Focus on antibody formulations targeting PD-L1.
Patent expiration timeline
- Filing date: 2012
- Expected expiry: 2032 (assuming 20-year term from filing), with possible extensions or pediatric adjustments.
Implications for stakeholders
- The patent covers essential combination strategies in immuno-oncology, with broad potential for generic challenges.
- Patent scope is sufficiently broad for initial product development but faces competition from prior art.
- Licensing opportunities may exist for companies developing immune potentiator agents or delivery systems that align with claims.
Key Takeaways
- ES2549763 covers combination therapies involving PD-1/PD-L1 inhibitors and immune response modulators for cancer treatment.
- Claims include compositions, methods of preparation, and methods of use, with varying scope from broad to targeted.
- The patent landscape features extensive filings from global pharma companies, especially US and European patent families, focusing on immunotherapy combinations.
- Patent expiry is projected around 2032 unless extension or legal challenges occur.
- A detailed freedom-to-operate analysis is advisable due to overlapping claims and prior art.
5 FAQs
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Does ES2549763 cover all PD-1 inhibitors?
No. It covers compositions with "a PD-1 or PD-L1 inhibitor," but specific agents like pembrolizumab or nivolumab need to meet claim language and embodiments.
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Can this patent be challenged based on prior art?
Yes. Numerous earlier filings relate to PD-1/PD-L1 combinations, potentially invalidating broad claims if prior use or publications prove overlap.
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Is the patent valid internationally?
The patent itself is limited to Spain, but corresponding patents or applications likely exist in Europe and other jurisdictions, expanding protection.
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What are potential licensing opportunities?
Companies developing immune potentiators or delivery systems may license or challenge this patent, especially if their compositions fall within claim scope.
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When does the patent expire?
Expected expiry date is 2032, assuming standard patent term calculations without extensions.
References
[1] Spanish Patent Office. (2013). ES2549763. Pharmaceutical compositions for cancer treatment.
[2] European Patent Office. (2023). Patent landscape reports on PD-1/PD-L1 combinations in immuno-oncology.
[3] U.S. Patent and Trademark Office. (2022). Patent filings in immuno-oncology.
[4] World Intellectual Property Organization. (2021). Trends in immunotherapy patent filings.
[5] Liao, Q., & Zhang, Y. (2022). Patent landscape of PD-1/PD-L1 immunotherapies. Journal of Immunology and Oncology.
