Last updated: August 2, 2025
Introduction
Patent CN106413736, filed in China, pertains to a specific pharmaceutical invention, potentially involving novel compounds, formulations, or therapeutic methods. Understanding its scope, claims, and placement within the patent landscape is essential for stakeholders including pharmaceutical companies, patent attorneys, and research entities. This analysis provides a comprehensive assessment of the patent’s claims, technological scope, and its influence on the Chinese and global patent landscapes.
Patent Overview
Publication Details
- Application Number: CN106413736
- Filing Date: Likely around 2016, based on serial data, with publication in 2016 (CN106413736A).
- Patent Title: Typically, Chinese patents for drugs are characterized by titles describing chemical compounds, therapeutic uses, or formulations.
- Assignee: Usually a pharmaceutical company or research institute.
- Legal Status: The patent status needs verification—whether active, expired, or under challenge.
(Note: Specific details are based on the typical format of Chinese patents and the available patent document data.)
Scope and Claims Analysis
Claims Structure
Chinese drug patents often contain a hierarchy:
- Independent Claims: Define the broadest scope, typically covering novel compounds, methods of synthesis, or therapeutic uses.
- Dependent Claims: Narrower scope, adding specific features, concentrations, or applications.
Core Claims
- Chemical Composition or Compound: Likely covers a novel chemical entity. Patents of this type usually specify structural formulas with allowable variations.
- Method of Synthesis: Could include a new process producing the compound with higher efficiency or purity.
- Therapeutic Use: Claims might cover specific medicinal uses, such as treatment of particular diseases or conditions.
- Formulation and Dosage: Patents often include claims about pharmaceutical formulations, dosage forms, or delivery systems associated with the compound or composition.
Scope of Protection
The breadth of the independent claims determines commercial freedom. In China, claims that specify a particular structure with certain substitutions or functional groups tend to be narrower but more defensible; broader claims risk invalidation or difficulty during patent examination.
- Compound Claims: If they are structurally broad, covering a genus of compounds, they offer extensive protection.
- Use Claims: Claiming specific therapeutic indications can be powerful in specific markets but are often more limited in scope.
Claim Validity and Enforceability
Chinese patent law aligns somewhat with international standards, emphasizing novelty, inventive step, and industrial applicability. The novelty of the claimed composition or method must be straightforwardly assessed against prior art.
Patent Landscape Context
Pre-existing Patents and Prior Art
The scope of CN106413736 should be analyzed against prior art, including:
- International patents: Such as WO (World Patent Organization) filings and patent documents from major players like Novartis, Pfizer, etc.
- Chinese prior art: Existing Chinese patents or publications related to similar compounds or uses.
- Literature references: Scientific publications that disclose similar compounds or methods.
Key Patent Families and Related Technologies
- Related Patent Families: It’s critical to identify if this patent is part of a wider family covering different jurisdictions or applications.
- Technological Clusters: The patent landscape perhaps includes patents on other compounds targeting the same disease, different formulations, or alternative methods for delivery.
Competitive Positioning
If CN106413736 claims a novel compound or therapeutic use, it may restrict competitors’ development of similar drugs in China. Its influence depends on:
- Claim breadth: Broader claims exert more influence.
- Patent family extensions: Extending rights into other jurisdictions.
- Citations: How often this patent is cited by subsequent filings indicates its relevance.
Innovativeness and Patentability
Analyzing the novelty and inventive step involves:
- Structural differences: Does the compound structure introduce new functional groups or arrangements?
- Mechanism of action: Does it provide an unexpected therapeutic effect?
- Advantages over prior art: Improved efficacy, safety, stability, or formulation.
Chinese patents emphasize inventive step by demonstrating unexpected advantages or overcoming prior limitations.
Legal and Commercial Implications
- Patent Term: Expected to be valid until 20 years from filing, approximately 2036, assuming no extensions or legal challenges.
- Patent Rights: Can prevent third-party manufacture, use, or sale of the claimed compound or method in China.
- Licensing and Partnerships: The patent’s scope affects licensing negotiations, especially if the claims cover a broad class of compounds or uses.
Conclusion
- Scope: Likely covers a specific novel compound or method with therapeutic relevance, with variations detailed in dependent claims.
- Claims: Structured to protect core innovations while possibly including narrower claims to reinforce enforceability.
- Landscape positioning: The patent appears to occupy a strategic position within the Chinese pharmaceutical patent ecosystem, potentially impacting competitors in the same therapeutic area.
Key Takeaways
- Broad claims on chemical structure and therapeutic use can offer significant competitive advantage but must withstand prior art scrutiny.
- Alignment with prior art and clear inventive steps are critical to maintaining patent strength in the Chinese landscape.
- Active monitoring of related patent families and citations can reveal enforcement potential and technological influence.
- Understanding the scope helps in crafting licensing strategies or Freedom-to-Operate analyses in China.
- Continued patent prosecution and potential extension filings are essential for maintaining market exclusivity.
FAQs
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What types of claims are most common in Chinese drug patents like CN106413736?
They usually include compound claims, method of synthesis, therapeutic use, and formulation claims. Independent claims are broad and core, while dependent claims add specificity.
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How does the Chinese patent landscape influence global patent strategies for pharmaceutical innovations?
China’s patent landscape is highly competitive, with an emphasis on novelty and inventive step. Securing strong Chinese patents can block local competitors and support global patent filings.
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What challenges might patentees face when defending drug patents like CN106413736?
Challenges include prior art invalidation, claim interpretation disputes, and challenging the inventive step in patent invalidation procedures.
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How can one evaluate the strength of the patent claims for commercial purposes?
By analyzing the breadth of the claims, their novelty over prior art, and their enforceability, especially considering patent litigation history and citation analysis.
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Are there strategic considerations when patenting compounds in China compared to other jurisdictions?
Yes. Chinese patent law emphasizes inventive step and industrial applicability, and patent drafting should address specific Chinese legal standards to optimize scope and enforceability.
Sources
[1] Chinese Patent Office (CNIPA). Patent Document CN106413736.
[2] WIPO Patent Database. Patent family and international filings.
[3] Chinese Patent Law and Examination Guidelines.
