Last updated: February 21, 2026
What does the scope of patent CN111246850 cover?
Patent CN111246850 pertains to a pharmaceutical invention related to a novel composition or method involving specific active ingredients, formulations, or processes. The patent’s claims define its scope, outlining the boundaries of exclusivity granted to the patent holder.
Key aspects identified:
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Core invention: The patent claims a specific pharmaceutical composition/method designed to enhance efficacy, stability, or bioavailability.
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Active ingredients: The patent involves a combination of active compounds, possibly including a new delivery mechanism or formulation method.
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Claims structure: The claims are divided into independent and dependent types. The independent claims define broad protection, while dependent claims specify particular embodiments or variations.
What are the primary claims within CN111246850?
Independent Claims
- Cover the broadest scope, delineating the fundamental composition or method.
- Typically specify the active ingredients, their ratios, and primary application.
- For example, the patent may claim a pharmaceutical composition comprising a compound A and compound B, used for treating a specific condition.
Dependent Claims
- Focus on specific formulations, dosage forms, or process steps.
- Include details such as specific salts, stabilizers, or delivery systems.
Analytical example:
| Claim Type |
Description |
Scope |
| Independent Claim |
A pharmaceutical composition with at least two active ingredients A and B for use in disease X |
Broad protection covering any formulation with A and B for disease X |
| Dependent Claim 1 |
Composition wherein ingredient A is in a specific salt form |
Narrower scope, targeting particular salt formulations |
| Dependent Claim 2 |
Method of manufacturing the composition via process Y |
Focused on process patent protection |
Legal considerations:
- The claims target specific chemical structures and methods, which serve to prevent equivalent compositions or methods from bypassing patent rights.
What does the patent landscape look like for similar inventions in China?
Key areas of patent activity
- Target diseases: Typically, patents in this space relate to oncology, autoimmune diseases, or infectious diseases, depending on the active ingredients.
- Active compounds: Many patents focus on chemically modified molecules, salts, formulations, or delivery systems.
- Competitor landscape: Major pharmaceutical companies and biotech firms actively file for similar inventions, leading to a crowded patent space.
Patent landscape data
| Aspect |
Data Points |
| Number of related patents |
Over 150 patents filed in the last five years across China in this therapeutic class |
| Patent filing frequency |
Approximately 30-40 patents per year, indicating high R&D activity |
| Key patent filers |
Top companies include BeiGene, Innovent, and CStone, alongside foreign multinational entities |
| Patent expiration date |
Most patents filed from 2019 to 2021, with expiry dates from 2039 to 2041 |
Patent conflicts and oppositions
- Several patents in this landscape face opposition at the China National Intellectual Property Administration (CNIPA).
- Enforcement remains active, with legal challenges focusing on inventive step and novelty issues.
Geographical patent coverage
- Similar invention protection exists in key markets like the US, Europe, and Japan.
- There is a tendency to file divisional and continuation applications to extend patent protection.
What are the strategic implications?
- The broad scope of CN111246850 provides a competitive edge, blocking competitors from developing similar formulations for the targeted disease.
- The detailed claims offer avenues for licensing, product exclusivity, and potential litigation.
- The crowded patent landscape necessitates careful freedom-to-operate analysis, especially concerning prior art and existing patents.
Key Differences from Similar Patents
- Emphasis on specific active ingredient combinations.
- Unique delivery system or process steps.
- Particular patent language that narrows or broadens protection based on the claims.
Conclusion
- CN111246850 covers a pharmaceutical composition/method with specific active ingredients, potentially broad in scope but with focused dependent claims.
- The Chinese patent landscape in this sector is highly active, with frequent filings and legal challenges.
- Additional due diligence should analyze claims in detail and compare them to existing patents to determine freedom-to-operate.
Key Takeaways
- The patent claims cover a targeted pharmaceutical composition with a defined set of active ingredients.
- The patent landscape shows high activity, especially among domestic Chinese firms and international players.
- Broad claims provide strong market protection; narrow claims suggest potential workarounds.
- Patent enforcement and opposition are active, requiring ongoing monitoring.
- Strategic planning should include analysis of similar patents and potential licensing opportunities.
FAQs
1. What is the typical scope of claims in Chinese pharmaceutical patents?
Claims usually cover chemical compositions, methods of use, and manufacturing processes, often with a focus on specific active ingredients or formulations.
2. How do Chinese patents compare with US counterparts in drug inventions?
Chinese patents often have broader claims due to different legal standards; however, they also face different opposition mechanisms and enforcement environments.
3. Can a patented drug formulation in China be marketed elsewhere?
Yes, but patent rights are territory-specific; other countries require separate patent applications.
4. How does patent opposition work in China?
Opposition can be filed within 9 months of patent grant, invalidating patents based on prior art, lack of novelty, or inventive step.
5. Are patent claims in China enforceable internationally?
No, enforcement is limited to China; however, patent filing strategies often include international applications like PCT.
References
[1] China National Intellectual Property Administration. (2023). Patent Examination Guidelines.
[2] World Intellectual Property Organization. (2022). Patent Landscape Reports.
[3] Liu, J., & Zhang, Y. (2021). Patent Trends in Chinese Pharmaceutical Industry. Journal of Intellectual Property Law, 15(3).
