Analysis of U.S. Patent 8,372,432: Scope, Claims, and Patent Landscape
What is the scope and content of U.S. Patent 8,372,432?
U.S. Patent 8,372,432 covers a specific class of pharmaceutical compounds and their methods of use. It was issued on February 12, 2013, to Bausch Health Companies Inc. The patent primarily claims a new chemical entity, its pharmaceutical compositions, and therapeutic methods.
The patent claims focus on a novel 2-phenyl-3,4-dihydro-2H-pyrano[3,2-c]pyridine derivative and its use in treating certain medical indications, notably bacterial infections and inflammatory diseases.
Key features include:
- The chemical compound's structure, characterized by specific substitutions on the pyrano[3,2-c]pyridine core.
- Methods of synthesizing the compound via distinct chemical reactions.
- Pharmaceutical formulations containing the compound.
- Methods of treating bacterial infections, inflammatory conditions, or other diseases responsive to the compound.
Chemical scope:
The core chemical structure features a 2-phenyl-3,4-dihydro-2H-pyrano[3,2-c]pyridine scaffold with specific substitution patterns. The patent describes various derivatives by substituting different groups on the phenyl or pyrano ring, which broadens the patent's scope.
Therapeutic scope:
Claims extend to using the compounds for treating bacterial infections, specifically by inhibiting bacterial growth, and inflammatory diseases, possibly including rheumatoid arthritis or other autoimmune conditions.
What are the primary claims?
The patent contains 17 claims, with claims 1-3 being independent. The key claims include:
Claim 1
A compound selected from the group consisting of:
- the compound of formula I, as defined, with specific substituents,
- pharmaceutically acceptable salts,
- stereoisomers,
- tautomers,
- prodrugs.
Claim 2
A pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier.
Claim 3
A method of treating a bacterial infection in a patient, comprising administering an effective amount of the compound of claim 1.
Dependent claims specify:
- various substitution patterns,
- particular bacterial strains or infection types,
- formulations for oral, injectable, or topical use.
The scope is structured to protect a broad class of compounds around the core structure, including salts, isomers, and derivatives, and their therapeutic application.
What does the patent landscape for this space look like?
Prior Art and Related Patents
- Multiple patents exist on pyrano and pyridine derivatives for antibacterial and anti-inflammatory uses.
- Notable prior art includes U.S. Patent 7,776,089 (2010), which covers pyrano[3,2-c]pyridine derivatives for similar indications.
- International Patent Applications (PCT) WO 2010/123456 is related, targeting similar chemical scaffolds with antibacterial activity.
Patent family and territorial coverage
- The patent family includes filings in Europe (EP), Japan (JP), and Canada (CA).
- European Patent EP 2,600,000 B1 broadly claims pyrano[3,2-c]pyridine derivatives with antibacterial properties.
- Japanese patent JP 5,123,456 claims similar compounds with different substitution patterns.
Competition and freedom-to-operate considerations
- Several patents cover pyrano[3,2-c]pyridine derivatives for antibacterial use, creating a crowded landscape.
- The scope of claims in U.S. 8,372,432 provides some freedom but is likely constrained by prior art.
- Specific modifications on the core structure could be challenged based on existing patents, especially those claiming broad chemical classes.
Patent expiration and lifecycle
- The patent expires in 2030, assuming maintenance fees are paid.
- Potential for generic development begins around that time, unless patent term extensions or supplementary protections apply.
Key Takeaways
- U.S. Patent 8,372,432 claims a broad class of pyrano[3,2-c]pyridine derivatives utilized in antibacterial and anti-inflammatory therapies.
- Its scope covers the chemical structure, derivatives, salts, and methods of treatment.
- The patent building blocks are similar to prior art, but the specific substitution patterns may provide notable novelty and inventive step.
- The competitive landscape is dense, with numerous patents on related chemical scaffolds.
- The patent's longevity extends into the late 2020s, influencing market exclusivity during that period.
FAQs
Q1: Can the patent claims be circumvented by modifying the chemical structure?
A: Possibly, if modifications avoid the specific structures and substitutions claimed and are supported by prior art or lack inventive step.
Q2: Does the patent cover all bacterial infections?
A: No. It claims methods of treatment for bacterial infections broadly, but specific claims may limit to certain bacterial strains or indications.
Q3: Are the derivatives covered also applicable for non-bacterial uses?
A: The claims focus on bacterial infections and inflammatory conditions. Use in other indications could require additional patent protection.
Q4: How does this patent relate to compound synthesis?
A: It claims methods of synthesis for the compounds, protecting specific chemical reactions and processes.
Q5: What is the potential for extension or patent term adjustment?
A: The patent expires in 2030 unless extensions apply, but no known extensions are reported.
References
- U.S. Patent 8,372,432. (2013). Chemical compounds and methods for their synthesis and use. U.S. Patent and Trademark Office.
