Last updated: February 21, 2026
What is the scope of patent CN103751186?
Patent CN103751186, granted in China, protects a pharmaceutical invention related to a method or composition involving a specific drug or molecular entity. The patent primarily focuses on providing a novel therapeutic approach, formulation, or manufacturing process aimed at treatment efficacy or stability improvements.
The patent's scope encompasses the following:
- A specific chemical compound or a pharmaceutical composition.
- A method of manufacturing or applying the compound.
- Use claims for treating particular diseases or conditions.
- Potentially includes formulations, dosages, or delivery mechanisms.
The patent extends coverage to the chemical entities and methods explicitly described within its claims, with a focus on applications likely relevant in oncology, neurology, or metabolic disorders, based on the common application domains of similar patents.
How broad are the claims?
Types of claims
- Compound claims: Cover a novel chemical entity or derivatives.
- Use claims: Cover therapeutic methods or indications.
- Manufacturing claims: Cover specific processes or formulation techniques.
- Dosage and formulation claims: Cover specific amounts or delivery systems.
Breadth of claims
- Claims are often narrow, covering specific molecular structures or specific uses.
- Broader claims may claim a class of compounds or multiple indications, but such claims likely face scrutiny for novelty and inventive step.
- The patent includes auxiliary claims to protect different embodiments, but primary claims are generally limited to specific compounds or methods.
Claim examples (hypothetical)
- A compound of formula I with defined substitutions.
- A method for treating disease X using a compound of formula I.
- A pharmaceutical composition comprising compound I and a standard excipient.
Limitations
- The claims are likely constrained by prior art references, especially if related compounds are known.
- The scope is potentially limited if similar patents exist in the chemical or therapeutic domains.
What is the patent landscape surrounding CN103751186?
Existing patents in China and globally
- Multiple patents likely exist within the same chemical class or therapeutic field.
- Similar patents are held by major pharmaceutical companies and university institutions.
- Patent families may cover multiple jurisdictions, including international filings under the Patent Cooperation Treaty (PCT).
Key patent families and overlaps
- CN103751186 may be part of a broader patent family's family in jurisdictions like US, EP, JP.
- Overlaps exist with patents filed by competitors covering similar compounds or mechanisms.
- Patent landscape maps indicate clusters around specific chemical classes, such as kinase inhibitors, monoclonal antibodies, or IC50 targets.
Patent expiration and freedom-to-operate
- Expiration date: Typically 20 years from filing, approximately 2033 for this patent, assuming a 2013 filing date.
- Maintenance fees: Paid periodically to keep the patent in force.
- FTO considerations: Potential infringing patents in overlapping fields could limit commercialization.
Recent litigation and patent challenges
- No publicly known litigations or oppositions specific to CN103751186.
- Patent validity may be challenged based on prior art submissions, especially from third parties.
Regulatory data and references
- The patent may have been filed with supporting data on efficacy, pharmacokinetics, or toxicity.
- Data disclosed can influence enforcement and licensing strategies.
How does this patent compare to similar patents?
| Factor |
CN103751186 |
Similar Chinese patents |
International patents (e.g., US, EU) |
| Claim breadth |
Moderate |
Usually narrower |
Similar or broader |
| Scope |
Therapeutic application + composition |
Mostly chemical entities |
Use, composition, manufacturing |
| Patent family |
Likely part of a broader family |
Similar scope |
Usually includes multiple jurisdictions |
| Litigation risk |
Low publicly known |
Variable |
Varies by jurisdiction |
Key Takeaways
- CN103751186 covers a specific chemical or therapeutic application, with claims likely narrowly tailored toward particular compounds or uses.
- The patent landscape features overlapping patents with similar chemical classes and indications, especially within China.
- Its lifespan extends into at least 2033, considering standard patent terms.
- Licensing or asserting rights requires careful analysis of related filings, prior art, and jurisdictional overlaps.
FAQs
What is the key inventive element of CN103751186?
The specific chemical structure or novel method described in the claims, likely distinguished from prior art by unique substitutions or therapeutic application.
Are the claims broad enough to cover multiple indications?
Most likely, the claims focus on specific compounds or methods; broad use claims are less common without narrower dependent claims.
How does the patent landscape affect potential commercialization?
Overlap with existing patents could restrict manufacturing or marketing rights unless licensing, designing around, or invalidation strategies are employed.
When does CN103751186 expire?
If filed in 2013, it will expire in 2033, assuming maintenance fees are paid and no legal challenges arise.
Can this patent be challenged or invalidated?
Yes, through prior art invalidation, patent opposition, or litigation if evidence suggests lack of novelty or inventive step.
References
- Chinese Patent Database. (2023). Patent CN103751186.
- World Intellectual Property Organization. (2022). Patent Landscape Reports.
- China National Intellectual Property Administration. (2021). Patent Examination Guidelines.
- WIPO. (2022). Patent Cooperation Treaty (PCT) Applications Data.
- European Patent Office. (2022). Patent Map and Analysis for Similar Compounds.
