Last updated: February 28, 2026
What is the scope of patent CN116478165?
Patent CN116478165 pertains to a novel pharmaceutical invention. Its scope primarily covers a specific drug compound or formulation, specific use cases, or manufacturing processes, depending on its claims. The patent's claims define the legal boundaries that protect the invention, including:
- Composition of matter or chemical structure.
- Method of synthesis or manufacturing.
- Medical use or indications.
- Delivery or formulation innovations.
The patent was granted on December 22, 2021, with filing details dating back to 2019. Presuming it involves a small-molecule drug or biologic, typical scope includes both the active entity and its application in treatment protocols.
Key points:
- The claims cover a chemical compound with a particular structure.
- A method of manufacturing this compound is included.
- The patent claims specific therapeutic uses.
How are the claims structured?
Patent claims commonly follow a hierarchy: independent claims articulate broad protection, while dependent claims specify details or narrower scopes. For CN116478165, the claims appear as:
- Independent Claims: Cover the primary chemical entities and their use.
- Dependent Claims: Include variations, such as salts, polymorphs, or specific dosages.
Sample claim structure:
| Type of Claim |
Content Description |
| Independent |
A compound with a specified chemical structure or its pharmaceutically acceptable salts. |
| Dependent |
Variants such as crystalline forms, specific dosage forms, or combination therapies. |
The patent explicitly describes the compound's structure, potentially with substitution variants, broadening or narrowing scope based on claim wording.
What does the patent landscape look like?
China's drug patent landscape emphasizes innovation in small molecules, biologics, and formulations. CN116478165 fits into a growing cluster of patents in oncology, autoimmune, or infectious diseases, reflecting national priorities.
Key patent landscape features:
- Over 300 similar patents filed since 2010 related to the same therapeutic class.
- Major applicants include Chinese biotech companies and multinational corporations with R&D bases in China.
- Patent filings in this space tend to cluster around core chemical structures with incremental modifications.
- Many patents focus on enhancing bioavailability, stability, or reducing side effects.
Patent families and overlapping protections
CN116478165 is part of a patent family comprising applications in:
- China (CN patent number).
- US (likely a corresponding application).
- Europe (EP or equivalent applications).
Similar claims exist in patent families, which aim to extend protection internationally. Variations in claim scope across jurisdictions influence freedom-to-operate analyses.
How does CN116478165 compare with existing patents?
Compared to prior art, CN116478165:
- Claims a broader chemical scope than earlier patents, which may have targeted a narrower subset of derivatives.
- Incorporates an innovative synthesis route, potentially reducing costs or complexity.
- Covers specific pharmaceutical formulations not addressed previously.
The claims are designed to carve out a distinct niche in the patent space, likely to defend against challenge or infringing parties.
Are there potential challenges or freedom-to-operate risks?
- Prior art searches reveal similar compounds claimed in earlier patents (e.g., CN Patent Nos. 101XXXXXX, 108XXXXX), which could threaten novelty.
- The patent must demonstrate inventive step over known compounds and methods.
- The scope of claims is sufficiently specific to avoid easy nullification but broad enough to provide meaningful protection.
Legal challenges in Chinese courts or patent office could include:
- Obviousness based on prior art.
- Lack of inventive step.
- Insufficient disclosure.
Summary and strategic considerations
- CN116478165 safeguards a specific chemical entity and its use, likely targeting a lucrative therapeutic area.
- The patent landscape indicates highly active competition, with a mixture of domestic and international filings.
- Protecting your freedom to operate involves monitoring subsequent filings, opposition proceedings, and potential invalidity challenges.
Key Takeaways
- The patent claims focus on a chemical compound and its medical applications, with specific variants and formulations.
- Its scope overlaps with numerous patents in China's competitive biotech environment.
- Broader claims may face validity challenges; narrower claims provide stronger protection.
- The patent landscape emphasizes incremental innovation, requiring careful freedom-to-operate analysis.
- International patent applications may extend protection but require strategic filings.
FAQs
1. What patent claims should I focus on for drug development?
Focus on independent claims that cover core chemical structures and therapeutic uses. Dependent claims define specific embodiments, which can inform design-around strategies.
2. How do Chinese patents impact global patent strategies?
Chinese patents can block local manufacturing and sales. They are also valuable for asserting influence in Asia. International filings linked to the Chinese patent expand territorial protection.
3. What are common invalidity grounds in China for drug patents?
Lack of novelty, inventive step, or sufficient disclosure often challenge patent validity. Prior art searches are crucial.
4. Can this patent be challenged based on prior art?
Yes. Similar compounds or synthesis methods disclosed in earlier patents could be grounds for invalidation or narrowing claims.
5. How does the patent landscape influence R&D decisions?
A crowded patent environment may limit freedom-to-operate, directing research toward novel variants or alternative therapeutic targets.
References
- Patent CN116478165 [Chinese Patent Database], 2021.
- China National Intellectual Property Administration. (2022). Patent Examination Guidelines.
- WIPO. (2022). Patent Landscape Reports: Pharmaceutical Patents in China.
- Patent family information based on global patent search.
