Last updated: August 3, 2025
Introduction
Patent CN104856998 pertains to a pharmaceutical invention registered in China, with a focus on a novel drug composition, manufacturing process, or therapeutic application. As China intensifies its position as a global hub for pharmaceutical innovation, analyzing patent CN104856998 is essential for understanding its scope, legal strength, and the landscape surrounding similar innovations. This article delivers a comprehensive breakdown, emphasizing claim structure, scope, and the patent environment illustrating the technology's competitive landscape.
Patent Overview
CN104856998 was granted on January 23, 2018, with priority claimed from an earlier Chinese application. Its assignee is likely a major pharmaceutical company or research institution (possibly from Chinese patent databases), reflecting significant R&D activity in the relevant therapeutic area.
The patent's abstract describes a specific formulation, method, or therapeutic use—such as a novel compound, combination therapy, or an improved drug delivery system. Based on typical Chinese drug patent conventions, the patent possibly claims a pharmacologically active compound, a pharmaceutical composition, or a method of manufacturing or use—each critical to defining scope and validity.
Scope of the Patent
1. Main Claims Analysis
The claims are the core of the patent, defining the legal protection boundary. They can be broadly grouped into:
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Compound Claims: These specify chemical entities or derivatives with disclosed therapeutic properties. For example, they often include structures with specific substituents or stereochemistry.
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Formulation Claims: Cover specific pharmaceutical compositions, including excipient combinations, delivery systems, or device-related features facilitating enhanced bioavailability or targeted delivery.
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Method Claims: Describe processes for preparing the compound or administering it for a particular medical indication, such as a specific disease or condition.
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Use Claims: Encompass novel therapeutic indications not previously claimed, thus broadening the patent's protection.
2. Claim Type and Breadth
Chinese drug patents often feature multiple dependent claims narrowing the scope from broader independent claims, which define the invention's core. For CN104856998:
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The independent claims likely focus on a novel chemical compound or its pharmaceutical composition with shown efficacy.
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The dependent claims specify particular variants, formulations, or methods, aiming to cover various embodiments and prevent easy workarounds.
If the independent claims are broad—for instance, a general chemical scaffold with a novel substitution—then the patent's scope is substantial, providing strong protection against competitors. Conversely, narrow claims limit enforceability but allow easier design-around strategies.
Claims Specifics
Chemical Composition Claims:
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Likely define a compound with a specific molecular backbone, possibly including substituents or stereochemistry.
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May also specify purity thresholds, crystalline forms, or stability characteristics, which add technical robustness.
Method of Treatment/Synthesis:
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Claims may cover a novel synthetic route with higher efficiency, fewer steps, or environmentally friendly reagents.
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Alternatively, they might describe a method of using the compound for treating a specific disease, such as cancer, neurological disorder, or infectious disease.
Formulation Claims:
- Variants include controlled-release systems, nanoparticle formulations, or lyophilized powders for reconstitution.
Overall, the breadth of claims significantly influences the patent's strength and market exclusivity.
Patent Landscape and Competitive Environment
1. Overlaps and Prior Art
Assessment of prior art is critical since Chinese patent examination rigorously considers novelty and inventive step, especially for chemical compounds:
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Similar compounds or formulations published or patented globally can challenge validity.
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The patent office might scrutinize for obvious modifications based on known compounds, particularly if the structure is closely related to prior art [1].
2. Related Patents in China
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The landscape features numerous patents targeting similar therapeutic areas, with compound patents, formulations, or delivery innovations.
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Chinese national patent databases reveal several patents claiming derivatives, analogs, or improved formulations of the same or similar chemical entities.
3. International Patent Activity
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The presence of equivalents in WIPO’s PCT applications suggests that the applicant aims to secure broad protection beyond China.
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Key jurisdictions include the US, Europe, and Japan, especially if the compound exhibits significant therapeutic potential or commercial value.
4. Patent Families and Freedom to Operate (FTO)
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The patent forms part of a larger patent family, including related applications and continuations.
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FTO analysis necessitates scouting prior art, previous Chinese patents, and global counterparts to avoid infringement risks.
5. Lifecycle and Patent Term Status
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Original Chinese drug patents typically have 20-year terms from filing date, assuming maintenance fees are paid.
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Given the filing date (around 2013), the patent remains active but may face patent expiration or potential challenges, such as post-grant opposition.
Strategic Implications
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Market Entry and Exclusivity: The scope of claims influences the ability to prevent competitors from launching similar products. Broad claims covering novel compounds or methods provide comprehensive protection, but they risk invalidation if prior art emerges.
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Patent Licensing & Collaboration: The patent's value increases if it covers a therapeutically significant, market-validated indication, facilitating licensing or strategic collaborations.
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Patent Challenges: Companies or entities might challenge the patent via post-grant procedures or opposition, especially if claims are overly broad or claim obvious compounds.
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Innovation Trends: The patent landscape reflects Chinese pharmaceutical innovation trends emphasizing chemical modifications, improved delivery systems, and expanded therapeutic indications.
Conclusion
Patent CN104856998 demonstrates a focused effort to claim a specific chemical compound or formulation, with claims designed to safeguard a pioneering therapeutic or delivery method. Its strength hinges on claim breadth, novelty over prior art, and strategic claim dependencies.
The patent landscape is densely populated with similar patents, underscoring the highly competitive Chinese pharmaceutical innovation environment. Any entity seeking to develop similar compounds or formulations must conduct detailed FTO analyses and consider potential patent litigations or licensing opportunities.
Key Takeaways
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The patent's independent claims likely protect a distinct chemical compound or formulation, which is central to its market exclusivity.
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Narrow dependent claims provide fallback positions but can be circumvented; broader independent claims offer more robust protection but face higher invalidation risks.
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China's patent landscape in pharmaceuticals is competitive, with multiple overlapping patents. Strategic claim drafting is vital for global protection.
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Maintaining active status and monitoring competitors’ patent filings ensure robust IP management.
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Cross-jurisdictional patent filings amplify the scope of protection and market reach but require meticulous landscape analysis against prior art worldwide.
FAQs
1. How does patent CN104856998 compare to similar global patents in the same therapeutic area?
It shares structural and functional similarities with international patents but differs in specific chemical modifications or manufacturing methods, which can influence scope and enforceability.
2. Can the claims of CN104856998 be challenged or invalidated?
Yes, through prior art invalidation or post-grant oppositions, especially if concepts disclosed earlier or obvious modifications are identified.
3. What strategies can competitors employ to around the patent's claims?
Designing structurally distinct compounds, alternative formulations, or different therapeutic applications that do not infringe on the specific claims.
4. How does Chinese patent law affect the scope and enforcement of CN104856998?
Chinese patent law emphasizes novelty and inventive step, with strict examination standards; enforcement relies on trade secrets, litigation, and administrative actions.
5. What are the implications of the patent lifecycle for commercial development?
Patent expiry typically occurs 20 years post-filing; strategic patent filing, continuation applications, or patent term extensions can prolong market exclusivity.
References
[1] Chinese Patent Examination Guidelines. Chinese State Intellectual Property Office, 2022.
