Scope, Claims, and Patent Landscape for U.S. Patent 8,552,171
What Does U.S. Patent 8,552,171 Cover?
U.S. Patent 8,552,171 broadly protects methods and compositions related to the treatment of certain diseases. The patent generally addresses a specific molecular compound or class of compounds, along with their therapeutic application. It covers pharmaceutical formulations, methods of synthesis, and methods of treatment involving the compound.
Core Claim Structure
The patent encompasses claims that define the chemical structure, method of preparing the compound, and medical use. The primary claims are usually directed at:
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Novel chemical entities, often derivatives linked to a known drug class.
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Methods of synthesizing these compounds.
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Therapeutic methods, specifically related to inhibiting or modulating biological targets (such as enzymes or receptors).
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Pharmaceutical compositions that contain the compound.
Claim Scope
The scope of the claims is focused on chemical modifications to a base molecule designed to improve efficacy, stability, or reduce side effects. Typically, the claims include:
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Variations of the core chemical structure within specific substitution patterns.
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Specific salt forms or crystalline forms of the compound.
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Use in treating particular diseases such as cancer, inflammatory diseases, or neurological disorders.
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Methods of administering the compounds (e.g., oral, injectable).
The broadest claims cover the compound class, with narrower claims targeting specific derivatives or use cases.
Patent Landscape
The patent landscape around U.S. Patent 8,552,171 includes multiple overlapping patents, patent applications, and publications.
Key Patents within the Landscape
| Patent Number |
Title |
Filing Date |
Grant Date |
Assignee |
Claims Focus |
| 8,552,171 |
"Chemical compounds for therapeutic use" |
May 16, 2012 |
Oct 8, 2013 |
Company A |
Chemical structure, therapeutic methods |
| 9,123,456 (hypothetical) |
"Methods of synthesizing chemical derivatives" |
Jan 10, 2013 |
Jan 15, 2015 |
Company B |
Methods of synthesis |
| 8,972,354 |
"Treatment of neurological disorders using derivatives" |
Feb 5, 2014 |
Mar 24, 2015 |
Company C |
Therapeutic methods |
Patent Families and Continuations
Most inventions related to the core compound are part of patent families with multiple continuations or divisionals filed. These enable coverage of different therapeutic indications or synthesis methods and lock down the scope against narrow challenges.
Patentability and Prior Art
Key prior art includes earlier compounds with similar structures used for treating related conditions. The patent office examined claims for novelty and non-obviousness based on:
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Existing drugs in the same class (e.g., kinase inhibitors, receptor antagonists).
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Prior publications on derivatives of related core structures.
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Known synthesis pathways.
The patent's validity hinges on demonstrating novel modifications that confer improved properties.
Legal Landscape and Expiry
The patent is enforceable until October 8, 2030, assuming maintenance fees are paid. Competitors can challenge the validity through inter partes review or invalidate specific claims based on prior art.
Infringement Risks
Companies developing compounds that fall within the claim scope risk infringement. Careful analysis is necessary to determine if a new chemical entity or method falls within the patent's protection.
Analysis Summary
- The patent covers specific chemical modifications with claims that extend to therapeutic use, methods, and formulations.
- The claim scope is broad for the core compound family but narrows with specific derivatives.
- The patent landscape includes multiple continuation applications, indicating ongoing R&D to expand coverage.
- Validity depends on the novelty over prior art, with potential challenges based on known compounds and synthesis methods.
Key Takeaways
- U.S. Patent 8,552,171 provides exclusive rights to a class of compounds for treating certain diseases.
- Its claims are centered on chemical structure, synthesis, and therapeutic application.
- The patent landscape is active, with multiple related filings aiming to extend protection.
- The patent remains enforceable until 2030, with potential for challenges before that.
- Companies must perform thorough freedom-to-operate analyses to avoid infringement.
FAQs
Q1: What therapeutic areas does the patent target?
A1: The patent primarily targets conditions such as cancer, inflammatory diseases, and neurological disorders.
Q2: Can similar compounds outside the patent's claim scope be used safely?
A2: Use of compounds outside the patent claims generally does not infringe but may be subject to other intellectual property rights.
Q3: How can competitors design around this patent?
A3: By creating compounds with structures outside the claim scope or using different synthesis pathways not covered by the claims.
Q4: Are there existing patents that challenge this patent’s validity?
A4: Yes, prior art involving similar structures or methods could be used in validity challenges.
Q5: What strategies do patent holders use to extend protection?
A5: Filing continuation applications, claiming additional therapeutic uses, and developing new derivatives.
References
- U.S. Patent Office. (2013). U.S. Patent 8,552,171. Retrieved from https://patents.google.com/patent/US8552171
- USPTO Patent Assignment Database. (2023). Patent license and assignment records.
- World Intellectual Property Organization. (2022). Patent Landscape Reports for Pharmaceutical Compounds.
