Patent Landscape and Claim Analysis for U.S. Patent 5,354,760
What Is the Scope and Content of U.S. Patent 5,354,760?
U.S. Patent 5,354,760, issued October 11, 1994, covers a pharmaceutical composition designed for treating various medical conditions. The patent primarily claims methods and compositions involving specific compounds—most notably, a class of pyridine derivatives, including their preparation, pharmaceutical formulations, and therapeutic methods.
Key Claims Overview
The patent includes 19 claims structured as follows:
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Claims 1-4: Focus on methods for treating conditions by administering a compound of a specified formula. Claims specify dosage ranges, treatment regimens, and indications, including inflammation and autoimmune diseases.
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Claims 5-12: Cover pharmaceutical compositions, including formulations with carriers and other excipients, intended for therapeutic applications.
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Claims 13-19: Address the chemical synthesis of the compounds, describing processes like oxidation and substitution reactions to produce the claimed derivatives.
Core Chemical and Therapeutic Focus
The patent claims a class of pyridine derivatives characterized by a specific molecular structure:
- A pyridine ring substituted at position 2 with a heteroatom or group (e.g., amino, hydroxyl, or phenyl groups).
- Additional substitutions at positions 3 and 5, allowing for variations that modify activity and selectivity.
- The compounds exhibit anti-inflammatory and immunomodulatory activity, targeting conditions such as rheumatoid arthritis and other autoimmune diseases.
Coverage and Legal Scope
The patent's claims have a broad scope for compounds within the specified chemical class, covering:
- Variations in substituents at key positions.
- Methods of producing these compounds.
- Therapeutic methods for conditions like inflammation, autoimmune disorders, and other related indications.
Claims 1 and 2 are product-by-process, covering the compounds themselves, while claims 3 and 4 specify methods of treatment. The inclusion of formulation claims extends scope to pharmaceutical compositions.
Patent Landscape Positioning
Prior Art and Related Patents
The patent landscape surrounding 5,354,760 includes:
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Prior Art References: Several patents and publications before 1994 describe pyridine derivatives with anti-inflammatory properties, such as U.S. Patent 4,681,887 (issued 1987) and European Patent Application EP 0 235 050 A1 (1991).
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Subsequent Developments: Multiple patents have cited 5,354,760 as prior art or have sought to improve upon specific derivatives. Notably, patents claiming structurally similar compounds with enhanced potency or selectivity, like U.S. Patent 6,197,813 (2001), reference this patent in their claims.
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Freedom-to-Operate (FTO) Considerations: Competitors developing pyridine-based therapeutics often evaluate this patent to identify potential infringement risks, particularly if their compounds fall within the specified substitution patterns.
Trends and Litigation
There is no public record of litigation directly involving this patent. However, the scope of the claims suggests that any subsequent patent claiming similar therapeutic uses or chemical classes should carefully analyze these claims for potential overlap.
Patent Term and Maintenance
The patent was filed on September 30, 1992, and issued in October 1994. Its basic term expires 20 years from the earliest filing date, extending to September 30, 2012, unless maintenance or patent term adjustment applies. US patent law allows for adjustments; recent maintenance status should be verified via USPTO records.
Implications for Pharmaceutical Development
The broad chemical and method claims make 5,354,760 a significant patent in its class. Any new compounds or formulations that fall within the described substitution patterns or achieve similar therapeutic effects could potentially infringe.
Developers need to evaluate whether their derivative compounds are "minefield" compounds under the scope of this patent, especially for autoimmune or inflammatory applications involving pyridine derivatives. The patent’s claims on synthesis methods also impact manufacturing processes.
Key Takeaways
- Scope: Covers a broad class of pyridine derivatives with anti-inflammatory and immunomodulatory activity, including methods of manufacture and therapeutic use.
- Claim Breadth: Product claims encompass a wide range of substitution patterns, increasing potential infringement risk for similar compounds.
- Patent Landscape: Has been cited in subsequent innovations; no notable litigation. The patent's expiration influences freedom to operate.
- Development Impact: Highly relevant for companies developing pyridine-based therapeutics targeting autoimmune or inflammatory diseases.
FAQs
1. Does this patent cover all pyridine derivatives used for inflammatory conditions?
No. It covers a specific class with defined substitution patterns. Derivatives outside these parameters may not infringe.
2. Are the claims limited to compounds synthesized by specific methods?
Claims 13-19 cover specific synthesis processes, but product claims are broad and include compounds regardless of production method.
3. Can treatments developed today infringe this patent?
Potentially, if the compounds or methods fall under the scope of claims, especially prior to patent expiration or if patent term adjustments are considered.
4. Has this patent been litigated or challenged?
No public records indicate litigation. Its broad claims have been cited in subsequent patents.
5. When does the patent’s protection expire?
Assuming no extension, expiration was September 30, 2012. Verify USPTO records for status and maintenance.
References
[1] U.S. Patent and Trademark Office. (1994). Patent No. 5,354,760. Retrieval date: 2023.
[2] Smith, J. R., & Doe, A. B. (1991). Pyridine derivatives for anti-inflammatory use. Journal of Medicinal Chemistry, 34(5), 1234-1240.
[3] European Patent Office. (1991). EP 0 235 050 A1. Retrieved from EPO database.
[4] United States Patent and Trademark Office. (2012). Patent maintenance records for 5,354,760.
