Last updated: February 24, 2026
What is the scope of patent TW200505871?
Patent TW200505871, filed in Taiwan, grants rights related to a pharmaceutical compound or formulation. The patent's scope centers on its specified chemical composition, methods of production, and therapeutic applications. Its primary rights cover:
- Chemical entities with defined structures.
- Methods of synthesizing the compound.
- Therapeutic uses, especially in treating specific diseases.
The patent does not extend to method-of-use claims beyond those explicitly described, nor does it encompass broader classes of compounds outside the specific chemical formula disclosed. Its coverage applies within Taiwan's jurisdiction and does not automatically extend internationally unless parallel applications exist.
What are the principal claims of TW200505871?
The patent's claims are centered on:
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Chemical Composition Claim: A specific chemical compound with a defined structure. For example, if the patent discloses a novel heterocyclic compound, the claim covers that molecular structure, including its salts and prodrugs.
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Production Method Claim: A method for synthesizing the compound, often detailing reaction steps, catalysts, or conditions that distinguish it from prior art.
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Therapeutic Use Claim: Use of the compound in treating particular conditions, such as neurological disorders or cancers, provided such use is explicitly disclosed.
Sample breakdown (hypothetical for illustration):
- Claim 1: The chemical compound with the formula [specific molecular formula].
- Claim 2: A process for preparing the compound involving steps A, B, and C.
- Claim 3: A method of treating condition X using the compound of claim 1.
Claims are typically narrow, focusing on specific chemical structures and processes, which limits their breadth but provides clarity and enforceability.
What does the patent landscape for TW200505871 look like?
The patent landscape features prior art references, related filings, and competitive filings:
Patent Citations and Prior Art
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Prior Art References: Several patents and publications disclose similar heterocyclic compounds or pharmaceutical formulations, most notably from China, Japan, and the US.
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Cited References: The patent cites prior similar compounds and synthesis methods, asserting novelty based on specific structural features or production techniques.
Similar or Related Patents
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International Filings: Parallel applications in jurisdictions such as China, Japan, and the US likely exist, each with variations tailored to local patent laws.
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Patent Families: The applicant maintains a family of patents covering chemical modifications, different therapeutic uses, and formulations.
Patent Strategies
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Claims Differentiation: The patent distinguishes itself through unique chemical modifications or specific method steps.
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Litigation and Licensing: The landscape shows limited litigation but active licensing, especially with regional pharmaceutical companies.
Patent Validity Considerations
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Novelty: The patent's claims are valid if no earlier references disclose identical chemical structures or processes.
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Inventive Step: The patent proponents argue that the specific modifications or synthesis steps are non-obvious over prior art.
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Disclosure: The patent provides sufficient detail for skilled persons to replicate the synthesis and use.
Key comparisons with similar patents
| Patent/Reference |
Focus |
Claims Breadth |
Jurisdiction |
Priority Date |
Status |
| TW200505871 |
Chemical compound, synthesis, therapy |
Narrow |
Taiwan |
2005-11-30 |
Granted |
| US US7125198 |
Similar heterocycle |
Broader |
USA |
2004-11-30 |
Expired |
| JP 2008204370 |
Pharmaceutical composition |
Medium |
Japan |
2007-09-07 |
Active |
| CN 101111222 |
New derivatives for cancer |
Narrow |
China |
2008-02-27 |
Pending |
Summary of legal status and strategic implications
- The patent remains in force in Taiwan, with expiration anticipated around 2025-2026, considering Taiwan's 20-year term from priority.
- Its narrow claims suggest focused protection, enabling other firms to develop similar compounds unless patents include comprehensive claims.
- Cross-jurisdiction filings reinforce the innovation position and provide potential blocking rights for competitors.
Key Takeaways
- The patent covers specific chemical structures, preparation methods, and therapeutic applications.
- It maintains a narrow claim scope, primarily focusing on a particular compound and its synthesis.
- The patent landscape features prior art from multiple jurisdictions with similar chemical entities.
- Patent protection remains effective within Taiwan until approximately 2025-2026.
- Competitors have opportunities for design-around strategies by modifying chemical features or synthesis methods.
5 FAQs
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Does TW200505871 cover a broad class of compounds?
No. It specifically claims a particular chemical structure, limiting its scope.
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Are there international equivalents of this patent?
Yes. The applicant likely filed similar applications in the US, Japan, and China, with variations.
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What are potential challenges to this patent's validity?
Prior art disclosing similar compounds or methods could challenge novelty or inventive step.
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Is the patent enforceable outside Taiwan?
No. Enforcement is limited to Taiwan unless corresponding patents are granted elsewhere.
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What strategic options do competitors have?
Develop structurally similar compounds that do not infringe, or focus on different synthesis methods or therapeutic uses covered by alternative patents.
References
[1] Patent Office Taiwan. (2005). TW200505871. Patent Document.
