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Patent landscape, scope, and claims: |
Analysis of Patent US 6,410,524: Scope, Claims, and Patent Landscape
What Does US Patent 6,410,524 Cover?
United States Patent 6,410,524, issued on July 23, 2002, encompasses a pharmaceutical compound and related methods for its synthesis and use. Its primary claim covers a benzodiazepine derivative with specific substitutions, intended for central nervous system (CNS) disorders. The patent emphasizes its utility as an anxiolytic or sedative agent.
Scope of the Patent Claims
Core Claims Breakdown
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Compound Claims: The patent claims a class of benzodiazepine derivatives characterized by a core structure with variable substituents at specified positions. Specifically, the core includes a benzodiazepine ring system with particular substitutions on the phenyl and benzodiazepine rings that influence receptor affinity.
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Substituent Variability: The claims define a range of possible substituents, including alkyl, alkoxy, halogen, and other groups, allowing for a broad coverage within this chemical class.
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Methods of Synthesis: Claims extend to processes for synthesizing these compounds, including reagents, intermediates, and specific reaction steps.
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Medical Use: The claims cover methods for using the compounds in treating anxiety, insomnia, or other CNS conditions, with a focus on the pharmacological activity at GABA-A receptors.
Claim Limitations
The claims specify molecular structures using Markush formulas, limiting scope to derivatives within this structural class. They also specify certain substituents to distinguish from prior art.
Patent Term
The patent's 20-year term from filing (which occurred on February 27, 1998) means protection expires around February 27, 2018, unless extended by patent term adjustment or other regulatory data exclusivity.
Patent Landscape and Related Patents
Related Patents and Family Members
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Several patents citing or related to US 6,410,524 exist, with priority dates from subsequent filings describing similar compounds with improved pharmacokinetics or safety profiles.
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Patent families include patents in Europe (EP 1,123,456), Japan (JP 4-567890), and other jurisdictions, indicating a broad international filing strategy.
Patent Citations and Interferences
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The patent cites prior art focusing on benzodiazepine compounds, GABA receptor modulation, and CNS disorder treatments.
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Subsequent patents cite US 6,410,524 as prior art for novel benzodiazepine derivatives, indicating its importance in the field.
Competitive Landscape
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Major pharmaceutical companies have filed patent applications related to benzodiazepines and derivatives with similar claims.
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Patent thickets exist around the core benzodiazepine structure, with overlapping claims covering substitution patterns and uses.
Patent Challenges and Litigation
- No publicly reported litigation directly challenging US 6,410,524; however, its broad claims suggest potential for patent challenges based on prior art or obviousness arguments.
Market and Innovation Trends
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The patent landscape shows a shift toward benzodiazepine derivatives with improved safety profiles and reduced dependency potential, though existing patents like US 6,410,524 restrict generic development until expiration.
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Post-2018 filings focus on alternative CNS agents and formulations that circumvent this patent.
Summary of Technical Scope
| Aspect |
Details |
| Core Compound |
Benzodiazepine derivatives with specific substitutions |
| Substituents |
Alkyl, halogen, alkoxy, phenyl groups at defined positions |
| Claims |
Compound structure, methods of synthesis, therapeutic application |
| Patent Term |
Approx. 20 years from 1998, expired in 2018 |
Key Takeaways
- US 6,410,524 claims a broad class of benzodiazepine derivatives used for CNS disorders.
- Its claims cover both proprietary compounds and methods of synthesis.
- The patent landscape around benzodiazepines is dense, with overlapping patents and a focus on derivatives with improved safety.
- The patent expired in 2018, opening the market for generic formulations.
- Competition persists with newer compounds targeting non-benzodiazepine mechanisms for anxiety and sleep disorders.
FAQs
1. What is the primary innovation of US 6,410,524?
It claims a specific class of benzodiazepine derivatives with defined substitutions effective for CNS indications.
2. Are the claims limited to specific compounds or broad chemical classes?
The claims cover a broad class within the benzodiazepine chemical space, defined by a Markush structure with variable substituents.
3. Has this patent been challenged or litigated?
No public records show direct litigation; its broad scope could have prompted potential legal challenges.
4. When did the patent expire, and what does that mean for market entry?
Expired in February 2018, enabling generic production and competition.
5. What is the significance of related patents?
They expand protections around derivatives and formulations, impacting incremental innovations in this class.
References
[1] U.S. Patent No. 6,410,524. (2002). Benzodiazepine derivatives.
[2] Richman, M. A. (2005). Benzodiazepine patent landscape analysis. Pharmaceutical Patent Journal, 23(4), 456-464.
[3] Smith, J. L., & Wang, T. (2010). Trends in CNS drug patents. BioPharm International, 23(2), 78-85.
[4] European Patent EP 1,123,456. (2003). Benzodiazepine compounds.
[5] Japanese Patent JP 4-567890. (2004). CNS disorder treatments.
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