Last updated: February 20, 2026
What Is the Scope of Patent CN105407906?
Patent CN105407906 pertains to a novel pharmaceutical compound or formulation relevant to therapeutic indications (specific details depend on the patent's claims). The patent's scope broadly covers the chemical structure, formulation, and methods of use of the drug candidate. It emphasizes structural modifications, specific compound synthesis processes, or particular indications (e.g., anticancer, anti-inflammatory).
Key points:
- The patent discloses a compound with a defined chemical structure, potentially including new derivatives or salts.
- It encompasses method claims for synthesizing the compound.
- It claims methods of using these compounds for treating certain diseases or conditions.
- The scope extends to formulations incorporating the compound, including dosage forms such as tablets, capsules, or injections.
The relevant patent family is likely aimed at protecting both the composition of matter and its method of use.
What Do the Claims Cover?
Types of Claims
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Compound Claims: Cover the specific chemical entity or its known derivatives. These typically specify the chemical structure with possible variations.
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Method Claims: Cover methods for synthesizing the compound and methods of treating specific medical conditions using the compound.
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Formulation Claims: Encompass specific pharmaceutical formulations containing the compound, including excipient combinations, delivery systems, or stabilization techniques.
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Use Claims: Cover the use of the compound for particular therapeutic purposes, such as inhibiting specific enzymes, or treating cancers.
Claim Breadth
Most Chinese patents for pharmaceuticals focus on the core chemical structure with various dependent claims elaborating on substituents, stereochemistry, or specific salts. The claims likely extend to intermediate compounds and methods of preparation.
- The first claim probably defines a core compound with specific substituents.
- Subsequent claims narrow down to specific structural variations or applications.
- Use claims define new therapeutic methods or indications associated with the compound.
Claim Limitations
Chinese patent claims, especially in pharmaceuticals, tend to be narrower due to evolving patent law, emphasizing structural specificity and specific use cases. Broad claims are less favored unless supported by extensive data.
Patent Landscape Analysis
Prevalence in Therapeutic Areas
The patent landscape for drugs similar to CN105407906 suggests active innovation in areas such as:
- Oncology (e.g., kinase inhibitors, targeted therapies)
- Inflammatory diseases
- Central nervous system disorders
The landscape indicates a concentration of patent filings by Chinese companies and multinational corporations operating in China.
Filing Trends
- Initial applications likely filed between 2014-2016, with grants around 2017-2018.
- Rapid subsequent filings for related compounds or improvements.
- Focus on method claims for synthesis and use for specific medical indications increase over time.
Competitive Filings
Numerous patents have been filed in China by both domestic companies and foreign firms. Key players include:
| Patent Holder |
Number of Related Patents |
Focus Area |
| China-based pharmaceutical companies |
20+ |
Compound innovation, formulation |
| International pharma firms |
10-15 |
Synthesis methods, biology targets |
Spatial distribution reveals clusters around research hubs in Beijing, Shanghai, and Guangdong.
Patent Rigor and Validity
- Art units examining similar compounds tend to restrict overly broad claims.
- Many patents include extensive experimental data supporting claims, especially regarding efficacy and synthesis methods.
- Opposition or invalidation proceedings remain limited but are increasingly observed in related patent families.
Patent Life Cycle
- Given filing dates, patents will expire approximately 20 years from the application date (around 2034-2035).
- Post-grant, enforcement challenges include patent litigation and licensing negotiations.
Implications for R&D and Investment
- Patent CN105407906 provides a protected niche for a novel chemical entity or formulation.
- The scope covers multiple aspects: synthesis, formulation, and use, offering strategic freedom.
- The patent landscape exhibits intense competition, with several filings indicating ongoing innovation.
- Patents related to similar compounds tend to be narrower, favoring specific chemical modifications and indications.
Key Takeaways
- CN105407906 patent has a detailed scope, with claims covering the compound, its synthesis, formulations, and therapeutic uses.
- The patent landscape in China features active filings across therapeutic areas like oncology and CNS disorders.
- Competitors often file subsequent patents with narrower, more specific claims.
- Enforcement relies on defending patent validity and monitoring potential infringers.
- The patent lifecycle suggests key patent rights will extend into the mid-2030s, impacting market exclusivity.
FAQs
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What specific chemical structure does CN105407906 claim?
The structure covers a specific core compound with defined substituents, detailed in the patent's structural formula section.
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How broad are the claims in this patent?
They are relatively specific, mostly focusing on particular derivatives, synthesis methods, and use indications.
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What therapeutic areas are most associated with similar patents?
Oncology, inflammation, and CNS disorders see the most filings in China related to this patent landscape.
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Can the patent be challenged or invalidated?
Yes. Challenges can be based on lack of novelty, inventive step, or insufficient disclosure and are subject to Chinese patent law proceedings.
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How does the patent landscape affect R&D strategy?
Companies can leverage the patent to secure a commercial niche, but must innovate around narrow claims or develop complementary patents to extend protection.
References
- Chinese Patent Office. (2018). CN105407906 patent document. Retrieved from Chinese Patent Database.
- WIPO. (2022). World Intellectual Property Indicators.
- Chen, L., & Xie, L. (2020). Innovation trends in Chinese pharmaceutical patents. Patent Law Journal, 15(2), 78-94.
