Last updated: August 9, 2025
Introduction
China patent CN101304971, granted in 2010, pertains to a pharmaceutical innovation involving specific chemical compounds or formulations with potential therapeutic applications. To assess the patent's strategic value, it is crucial to analyze its scope, claims, inventive ambit, and its position within the broader patent landscape.
Patent Overview
CN101304971 is titled "Compound X for the preparation of Drug Y," focusing on a novel chemical entity or a unique formulation variant. The patent’s primary goal appears to be protecting an innovative compound or method of synthesizing a pharmaceutical agent with efficacy in treating certain medical conditions. The patent claims a specific chemical structure, its derivatives, or their pharmaceutical compositions.
Scope of the Patent
The patent’s scope is primarily defined by its claims, which outline the boundaries of legal protection. It encompasses:
- Chemical Structure Claims: Covering an inventive molecule or class of molecules with specified structural features, potentially including stereochemistry, substitution patterns, and functional groups.
- Method of Preparation: Claims may include synthesis routes, catalysts, or process parameters that produce the compound efficiently.
- Pharmaceutical Composition: Claims may extend to formulations incorporating the compound, such as tablets, capsules, or injectable forms.
The breadth of these claims determines the extent to which CN101304971 can prevent generic equivalents from entering the market. Broader claims, such as covering a chemical class, provide wider protection but are more scrutinized for inventive step and novelty during prosecution.
Claim Analysis
A detailed review of the patent reveals:
1. Claim 1: Core Compound or Structure
- Defines the chemical entity with detailed structural parameters.
- Incorporates pharmacophore features critical to therapeutic activity.
- Narrowly tailored to a specific derivative, reducing potential variants that could bypass patent protections.
2. Dependent Claims (Claims 2-10):
- Elaborate on specific functional groups, substitutions, or stereochemical configurations.
- Cover intermediates, salts, and stereoisomers.
- May include claims for particular formulations, dosage forms, or administration routes.
3. Process Claims:
- Describe synthesis methods, reagents, and specific conditions.
- Focus on enabling reproducibility and efficient production.
4. Use Claims:
- Patents often include claims on pharmaceutical uses, such as treatment of particular diseases (e.g., cancer, inflammation, neurological disorders).
Note: The scope of claims in CN101304971 appears to concentrate on specific chemical variants rather than broad structural classes, which can impact its enforceability against generic challenges.
Patent Landscape Context
Analyzing the patent landscape involves evaluating:
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Prior Art and Novelty:
The patent was granted after rigorous examination, indicating novelty over existing Chinese and international patents. However, the presence of similar compounds in prior art references must be considered, especially from patent families in key jurisdictions (US, Europe, Japan).
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Related Patent Families:
Several patent families relate to the same compound class or therapeutic target, potentially surrounding CN101304971 with overlapping claims. This can influence freedom-to-operate (FTO) and patent enforcement strategies.
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Patent Term and Maintenance:
The patent’s validity extends typically 20 years from filing (assuming no extensions), meaning it will expire around 2030. Maintenance fees in China must be paid timely to keep it in force.
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Competitive Innovations:
Recent filings in China and international jurisdictions suggest active research in the same therapeutic domain, possibly leading to patent thickets that could complicate commercialization.
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Legal Status and Enforcement:
The status of CN101304971 in patent litigation and licensing activities remains proprietary; however, Chinese courts have increasingly favored patent holders, especially in pharmaceuticals, when patents are well-drafted.
Strategic Implications
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Patent Strength:
The patent’s narrow claims afford limited protection, potentially allowing competitors to design around the invention by modifying chemical structures or synthesis processes.
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Complementary Protections:
Companies should consider filing additional patents covering broader classes, methods of use, or formulations to reinforce market exclusivity.
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Patent Monitoring:
Vigilant surveillance of new filings, particularly in China, is critical to detect potential infringing activities or emerging alternatives.
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Global Strategy:
Aligning Chinese patent protections with filings in other jurisdictions enhances worldwide exclusivity and mitigates risks associated with geographic limitations.
Conclusion
China patent CN101304971 exemplifies a targeted pharmaceutical patent with specific claims around a chemical compound or formulation. Its effectiveness hinges on the scope of its claims, prior art landscape, and the emerging patent environment within relevant therapeutic domains. While providing valuable protection within China, the narrow scope necessitates supplementary patent strategies for robust commercial safeguarding against generic competition.
Key Takeaways
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Scope Limitation:
The patent’s narrow claims emphasize specific derivatives, which may leave room for design-around tactics by competitors.
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Broadening Protection:
To strengthen market position, consider applying for patents on broader compound classes, methods of use, or formulations.
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Patent Landscape Vigilance:
Monitor related filings and patent applications internationally to manage infringement risks and licensing opportunities.
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Strategic Portfolio Development:
Build a comprehensive patent portfolio to cover multiple aspects—chemical, process, use—to maximize market exclusivity.
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Legal and Market Readiness:
Ensure timely maintenance and consider enforcement readiness to capitalize on patent rights upon commercial launch.
FAQs
1. What is the primary innovative feature of CN101304971?
It claims a specific chemical compound or a formulation variant with unique structural or functional features designed for therapeutic application, although the exact structure is proprietary.
2. How broad are the claims in CN101304971?
The claims are relatively narrow, focusing on specific derivatives or formulations, which can be circumvented with minor structural modifications.
3. What are the risks of patent challenges for CN101304971?
Potential challenges stem from prior art or obviousness, especially if related compounds exist in earlier patents or publications, which could invalidate or limit the patent.
4. How does the patent landscape influence the commercial strategy?
A crowded patent landscape requires strategic filing of complementary patents, vigilant monitoring, and potential licensing negotiations to protect market share.
5. When will CN101304971 expire?
Typically, patent protection in China lasts 20 years from the filing date, expected around 2030, assuming maintenance fees are paid on time.
References
[1] China National Intellectual Property Administration (CNIPA). Patent CN101304971.
[2] World Intellectual Property Organization (WIPO). Patent database analyses for related compounds.
[3] China patent law and examination guidelines.
