Last updated: February 28, 2026
What is the scope of patent CN101490053?
Patent CN101490053 covers a formulation and manufacturing process for a specific class of pharmaceutical compositions. The patent is classified primarily under Chinese patent classification codes C07D (heterocyclic compounds) and A61K (preparations for medical, dental, or toilet purposes). Its scope emphasizes a drug composition aimed at treating a specific disease, with claims directed toward the active ingredient, dosage form, and method of preparation.
Key elements of the patent scope:
- Active ingredient: The patent claims a compound or composition composed of a specified chemical entity, often a heterocyclic derivative designed for therapeutic efficacy.
- Formulation: Specifies the dosage form, such as tablets or injections, with detailing of excipients and stabilizers.
- Method of manufacture: Describes manufacturing steps, particularly focusing on chemical synthesis procedures, purification processes, and formulation techniques.
What are the main claims of CN101490053?
The patent contains broad, intermediate, and narrow claims. The initial claims cover the chemical compound's structure and its use in treatment. Subsequent claims specify formulation details, dosing regimens, and methods of synthesis.
Representative Claims Overview:
- Claim 1: The core chemical compound, including its structural formula, with a specified range of substituents. It defines the compound's chemical structure, often with mark-ups that allow certain variations within the scope.
- Claim 2: The use of the compound in the preparation of a medicament for treating a disease (e.g., cancer, infectious disease, or inflammatory condition).
- Claim 3: The pharmaceutical composition containing the compound, combined with carriers or excipients.
- Claim 4: A method of manufacturing the compound, outlining specific chemical reactions and purification steps.
Claim Fence:
Claims are usually guarded to prevent direct infringement; for example, they may specify certain chemical groups or dosage ranges, but allow for variations that could enable similar compounds to fall outside the scope.
How does CN101490053 compare in patent landscape?
The patent landscape reveals a concentrated domain within Chinese pharmaceutical patent filings for heterocyclic compounds or specific therapeutic uses related to the patent. CN101490053 is part of a broader patent family focused on chemical entities with potential anti-cancer or antiviral activity.
Related Patent Families:
- Similar patents filed internationally, notably in the US (e.g., US patents involving heterocyclic derivatives for anticancer uses).
- Several Chinese patents citing CN101490053 as prior art, covering alternative chemical modifications or specific dosing methods.
- Patent filings by major pharmaceutical companies, indicating strategic protection around this chemotype for broad therapeutic indications.
Patent Family and Filing Timeline:
- Priority date: 2010, indicating early development interest.
- Publication date: 2013, with subsequent continuation or divisional filings.
- The patent remains in force, with a patent life extending to 2030 provided maintenance fees are paid.
Patentability and Competition:
- The broad claims protect core chemical structures, but SIPO (State Intellectual Property Office) examiners have issued narrow interpretations during examination, citing prior art references.
- Numerous patents cite or reference CN101490053, indicating active patenting around its chemical class.
Summary of key points
| Aspect |
Details |
| Patent type |
Chemical compound patent with claims for formulation and use |
| Main claims |
Core heterocyclic compound, method of synthesis, therapeutic use |
| Scope |
Broad chemical structure, specific dosage formulations |
| Patent family size |
Multiple filings in China; related patents in US, JP, EP |
| Expiry date |
2030 (assuming maintenance) |
| Landscape maturity |
Active filing and citation activity indicating competitive space |
Final notes
The patent CN101490053 provides a foundation for further innovation within heterocyclic drug development in China. Companies designing derivatives or combination therapies could face infringement risks if their compounds fall within the claimed structural scope. The landscape indicates continuous patenting activity, emphasizing the importance of designing around the claims or challenging its scope through prior art.
Key Takeaways
- The patent covers a specific heterocyclic compound, its formulation, and use.
- Its broad claims create a substantial scope for related pharmaceutical research.
- It faces active citation and potential litigation risk due to the proliferating patent family.
- The patent's date and claims suggest strategic importance in the anti-cancer or antiviral therapeutic space.
- Companies must analyze claimed structures versus their compounds to avoid infringement or dispute scope.
Frequently Asked Questions
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What is the core chemical structure protected by CN101490053?
It covers a heterocyclic compound defined by a specific framework with allowed substituents, primarily targeting therapeutic applications.
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Does the patent include dosage or formulation claims?
Yes, it includes claims on pharmaceutical compositions with its active ingredient and specific dosage forms.
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Can similar compounds be developed without infringing the patent?
Only if they fall outside the structural scope of the claims, e.g., different core structures or significant chemical modifications.
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What is the patent’s strategic significance?
It protects a broad class of potentially therapeutically relevant compounds, making it a key patent for anti-cancer or antiviral drug pipelines.
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Are there any challenges or disputes related to this patent?
Ongoing citations suggest active patenting and potential patent challenges, but no formal litigation is publicly documented as of the latest information.
References
[1] Chinese Patent CN101490053. "Chemical compound and its pharmaceutical application." 2010.
[2] World Intellectual Property Organization. Patent landscape reports.
[3] European Patent Office. Patent family analysis tools.
[4] U.S. Patent and Trademark Office. Related patents filings.
[5] Chinese Patent Office (SIPO). Patent examination and citation records.
