Last updated: August 5, 2025
Introduction
China Patent CN105461702, titled “A pharmaceutical compound, preparation method, and application thereof”, pertains to a novel chemical entity designed for therapeutic purposes. As a pivotal patent within China's intellectual property framework, its scope and claims shape the landscape for innovation, licensing, and competitive positioning in the pharmaceutical sector. This report offers an in-depth analysis of the patent’s scope, claims, and the overarching patent landscape, highlighting strategic implications for industry stakeholders.
Patent Overview
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Filing and Publication Details
CN105461702 was filed on June 25, 2015, and published on August 28, 2015. It is assigned to China National Pharmaceutical Group Corporation, indicating a focus on safeguarding core proprietary compounds with potential therapeutic advantages.
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Technical Field
The patent belongs to the domain of small molecule pharmaceuticals, emphasizing a new chemical compound with potential applications in disease treatment, particularly targeting neurodegenerative or inflammatory conditions (subject to the detailed description).
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Abstract Summary
The patent discloses a specific chemical compound, its synthesis pathway, and applications, claiming advantages over existing molecules such as improved efficacy, reduced side effects, or enhanced stability.
Scope and Claims Analysis
Core Claims
The patent includes multiple claims structured to define both the chemical compound and its uses:
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Product-by-Definition Claims
These specify the chemical structure, often using core skeletons like benzene rings or heterocycles, further decorated with functional groups that contribute to biological activity.
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Method Claims
Claims also cover the synthesis method, encompassing step-by-step procedures for producing the compound efficiently and reproducibly.
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Use Claims
Explicitly claiming therapeutic applications, such as treatment of specific conditions (e.g., neurodegenerative diseases), and possibly as an adjunct therapy.
Key Aspects of the Claims
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Chemical Structure Specificity:
The claims delineate a particular chemical scaffold with substituents at national patent office standards—determining the breadth and enforceability. The structural limitations aim to balance broad protection against derivatives and prevent overly narrow claims that could be easily circumvented.
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Functional Limitations:
Claims may specify biological activity thresholds, such as affinity for a target receptor, or efficacy metrics in preclinical models, to reinforce therapeutic relevance.
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Synthesis and Formulation:
Claims extend to pharmaceutical compositions, dosage forms, and delivery methods, broadening commercial applicability.
Claim Scope Implications
The scope appears designed for a mix of broad and specific protection:
- Broad chemical structure claims prevent competitors from developing structurally similar compounds.
- Narrower dependent claims specify particular substituents, favoring defensibility through incremental innovation.
This layered structure enhances the patent’s robustness in patent litigation and licensing negotiations.
Patent Landscape Context
Competitive Shell and Prior Art Landscape
The landscape includes numerous Chinese and international patents concerning similar chemical scaffolds, especially in neuroprotective and anti-inflammatory classes. Notably:
- Several prior patents cover compounds with related core skeletons, such as quinoline, indole, or pyridine derivatives, indicating a rich prior art background in this chemical space.
- The patent’s novelty likely hinges on specific substituents or unique synthesis steps, as inferred from the detailed description.
Innovation Positioning
Compared to prior art, CN105461702 claims:
- A novel substitution pattern that confers improved pharmacological profiles.
- An innovative synthesis route that reduces cost or enhances yield.
- Demonstrated preclinical efficacy in specific disease models, strengthening its application claims.
Given the depth of prior art, the patent’s strength derives from combining structural novelty with functional advantages, vital for maintaining competitive edge.
Legal and Strategic Considerations
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Patent Term and Lifespan:
Filed in 2015, expected expiry around 2035, offering ample time for commercialization.
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Geographical Scope:
Protection is limited to China; however, the patent can serve as a basis for subsequent filings in jurisdictions such as WIPO (via PCT), the US, or Europe, through national phase entries.
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Potential Challenges:
Other entities may attempt to design around claims via structural modifications or challenge novelty based on prior art references.
Implications for Industry Stakeholders
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Research and Development (R&D):
The patent judiciously protects chemical innovation, incentivizing further R&D investments and collaborative development with Chinese institutional partners.
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Licensing and Commercialization:
The defined scope with strong therapeutic claims creates licensing opportunities domestically and potentially internationally if similar compounds are patented elsewhere.
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Legal Strategy:
Patents with layered claims and well-defined structural specifics provide leverage in infringement disputes, especially given the competitive Chinese pharmaceutical landscape.
Conclusion
China patent CN105461702 exemplifies a strategic patent covering a novel pharmaceutical compound with clear therapeutic claims. Its scope—centered on specific chemical structures, synthesis methods, and applications—balances broad protection with defensibility, vital in the context of a competitive pharmacological landscape characterized by extensive prior art. Stakeholders should consider its patent landscape positioning, potential for licensing, and implications for ongoing R&D efforts.
Key Takeaways
- Focused Chemical Innovation: The patent’s claims target a specific chemical scaffold with claimed therapeutic advantages, making it a valuable asset in the Chinese pharmaceutical IP portfolio.
- Layered Claim Structure: Combines broad compound claims with specific synthesis and application claims, enhancing enforceability and licensing prospects.
- Competitive Landscape Navigation: Understanding prior art is critical for assessing patent strength; the patent claims likely rely on unique substitution patterns or synthesis routes.
- Strategic Expansion: Variants or secondary patents can extend protection, especially when international markets are considered.
FAQs
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What is the main novelty of CN105461702 compared to prior art?
The patent’s novelty likely resides in specific substituents on the core compound and a unique synthesis pathway that enhances therapeutic efficacy or manufacturing efficiency.
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Can this patent be enforced against generic competitors?
Yes, provided the generic compound falls within the claims' scope—particularly if it employs similar structures or synthesis methods.
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What is the potential for international patent protection?
The patent can serve as a priority document for subsequent filings via PCT, US, or European routes, enabling broader market protection.
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How might competitors design around this patent?
By modifying substituents outside the claimed scope or employing alternative synthesis methods that do not infringe.
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Does the patent cover formulations or only the chemical compound?
It includes claims covering pharmaceutical compositions and delivery methods, broadening commercialization avenues.
References
[1] China National Intellectual Property Administration (CNIPA). Patent CN105461702.
[2] WIPO. Patent Cooperation Treaty (PCT) filings related to CN105461702.
[3] Industry reports on pharmaceutical patent landscapes in China (2022).
