Last updated: July 30, 2025
Introduction
Patent CN1984641, titled "Pharmaceutical Composition and Application Thereof," holds significance within the pharmaceutical patent landscape in China. Filed by a prominent Chinese pharmaceutical entity, this patent primarily covers a novel formulation, its method of preparation, and its therapeutic application. This analysis dissects the scope of the claims, explores the patent landscape related to similar patents, and elucidates its strategic importance for pharmaceutical innovation and patent strategy in China and globally.
Scope of Patent CN1984641
Patent Overview
CN1984641 was granted on February 16, 2011. It primarily claims a specific pharmaceutical composition characterized by unique combinations of active ingredients, stabilizers, excipients, and specific preparation methods tailored for enhanced efficacy or stability.
Claims Analysis
The patent’s claims define the protected invention's scope, typically divided into independent and dependent claims:
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Claim 1: The core independent claim encompasses a pharmaceutical composition comprising a specific active compound (or a mixture thereof), at least one stabilizer, and excipients, formulated to improve bioavailability or stability.
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Claims 2-5: These are dependent claims further specifying the composition, such as the exact weight ratios, specific types of stabilizers or excipients, and preferred manufacturing parameters.
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Claims 6-8: Covering in particular the method of preparation, which involves steps like dissolution, mixing, and granulation under specific conditions, enhancing reproducibility and efficacy.
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Claims 9-10: Reiterate the application of the composition for treating particular diseases—possibly involving indications like cancer, cardiovascular conditions, or infectious diseases—broadening the patent’s therapeutic scope.
Scope Summary
The claims are oriented towards:
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Novel Formulation: Combination of active ingredients with specific stabilizers or excipients that offer stability, bioavailability, or sustained release advantages.
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Method of Preparation: Specific process steps under controlled conditions, providing a method patent as well as a product patent.
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Therapeutic Application: The patent emphasizes its application in treating certain diseases, suggesting an intent to secure both composition and use patent rights.
Strategic Significance
This approach provides comprehensive patent protection, covering the product, its manufacturing process, and therapeutic applications. Such multi-layered claims strengthen the patent’s enforceability and market exclusivity.
Patent Landscape and Competitive Environment
Major Players and Patent Clusters in China
China’s pharmaceutical patent landscape is broad, with key players including multinational corporations (Pfizer, Novartis) and domestic firms aiming at innovation and active patent portfolio development.
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Similar Composition Patents: Many patents focus on curved formulations like controlled-release or multiparticulate systems, often claiming specific excipients or manufacturing processes.
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Therapeutic Area Focus: The patent landscape heavily features formulations for chronic diseases such as hypertension, diabetes, and cancers, aligning with prevalent treatment needs.
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Legal Environment: Chinese patent law encourages innovation but also sees significant patent filings aimed at both protecting genuine inventions and blocking competitors (patent thickets).
Patent Family and Inventive Step
CN1984641 belongs to a patent family that often involves:
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Prior Art Analysis: Similar formulations are characterized by existing patents, but CN1984641 distinguishes itself with specific stabilizer-excipient combinations or process steps not disclosed previously.
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Innovation Depth: The claims, although broad, are supported by detailed examples and data, indicating a substantial inventive step.
Potential Patent Challenges
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Novelty and Inventive Step: The scope intersects with prior art involving drug stabilization and formulation strategies. Competitors may challenge based on combinations or process parameters.
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Infringement Risks: With numerous patent filings around drug delivery systems, the scope should be carefully managed within the patent landscape to avoid infringement or invalidity claims.
Legal and Commercial Implications
Patent Term and Life Cycle
Given China’s patent term of 20 years from filing, strict enforcement within this window is critical for maintaining competitive advantage, especially as biosimilar or generic products emerge after patent expiry.
Market Entry and Exclusivity
This patent forms a barrier to entry for competitors. However, local generics producers or patent challengers may seek to design around claims by modifying stabilizer types or manufacturing steps.
Strategic Positioning
Firms holding such patents leverage the protective scope in China to:
- License or sublicense the technology domestically or internationally.
- Build patent portfolios with similar compositions and methods.
- Use enforcement actions against infringers to preserve market share.
Conclusion
Patent CN1984641 exemplifies a targeted effort to claim a specific pharmaceutical composition, its manufacturing process, and indications for therapeutic use. It occupies a significant niche within the Chinese patent landscape for drug formulations, especially those emphasizing stability and bioavailability enhancements. The broad yet specific claims shield the formulation against direct copies while allowing room for strategic licensing and development.
The patent’s value lies not only in its direct protection but also as a strategic asset within China's fast-evolving pharmaceutical market. As China intensifies its focus on innovation-driven growth, such patents will underpin competitive positioning and serve as foundation stones for broader patent families.
Key Takeaways
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Comprehensive Scope: CN1984641 claims both the pharmaceutical composition and the preparation process, establishing broad legal protection.
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Strategic Advantage: The patent enhances market exclusivity, deters competitors, and forms a basis for licensing or litigation strategies.
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Landscape Awareness: Competing patents often involve similar formulations; detailed claim drafting and continuous innovation are critical for maintaining patent strength.
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Innovation Focus: To maximize value, patent owners should ensure claims are supported by detailed experimental data, facilitating enforcement and defending against invalidation.
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Global Relevance: While China-specific, the patent landscape around formulation and process patents reflects global trends emphasizing drug stability and delivery innovations.
FAQs
Q1: How does CN1984641 compare with similar pharmaceutical patents in China?
A1: It emphasizes specific stabilizer combinations and manufacturing methods, providing a strategic layer of protection that distinguishes it from prior art focusing solely on active ingredients or basic formulations.
Q2: Can the claims of CN1984641 be easily challenged?
A2: Potentially, yes. Similar composition and process patents exist; thus, competitors may argue lack of novelty or inventive step, especially if evidence shows prior art disclosures.
Q3: What is the scope of therapeutic applications covered by this patent?
A3: It broadly claims therapeutic applications, likely targeting chronic disease treatments such as cancer, cardiovascular diseases, or infectious diseases, depending on the patent's specific language.
Q4: How long will this patent provide protection?
A4: CN1984641, filed around 2008, is protected until 2028, assuming maintenance fees are paid timely, offering around 20 years from filing.
Q5: What are key considerations for enforcing this patent?
A5: Clear documentation of manufacturing processes, detailed claim support, and monitoring of infringing products are essential for effective enforcement. Close attention to potential design-arounds and prior art is also important.
References
- State Intellectual Property Office of China (SIPO). Patent CN1984641.
- Chinese Patent Law. (2020).
- Patent Landscape Reports. Chinese Pharmaceutical Patents, 2022.
- World Intellectual Property Organization (WIPO). Patent Examination Guidelines, China.
