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Patent landscape, scope, and claims: |
Scope, Claims, and Patent Landscape of U.S. Patent 8,192,722
What is Covered by U.S. Patent 8,192,722?
U.S. Patent 8,192,722, granted on June 12, 2012, assigns rights to a pharmaceutical invention related to compounds and methods for treating diseases, primarily in the field of cancer and inflammatory conditions. The patent describes novel molecules, their synthesis, and utilization methods, focusing on specific chemical structures.
Key Patent Claims
The patent contains 23 claims, with the primary claims centered on:
- Chemical compounds: Novel heterocyclic molecules with specified substituents. These compounds are characterized by a core structure described as a substituted quinazolinone derivative.
- Method of synthesis: Processes for preparing the novel compounds, involving specific reagents, conditions, and intermediates.
- Therapeutic use: Methods for treating cancers such as non-small cell lung carcinoma, breast cancer, and inflammatory diseases by administering the compounds.
Scope of Claims
Compound Claims:
- Cover a class of compounds defined by a quinazolinone core with variable substituents at designated positions.
- The claims specify a range of possible substituents (alkyl, aryl, heteroaryl groups), enabling broad coverage over related derivatives.
Method Claims:
- Include steps for synthesizing the compounds, particularly highlighting conditions like temperatures, solvents, and catalysts.
- Encompass pharmaceutical compositions containing the compounds and their administration routes.
Use Claims:
- Cover methods of treatment using the compounds for diseases associated with abnormal cell proliferation and inflammation.
Patent Landscape Analysis
Similar Patents and Patent Families
The landscape features multiple patent families, including:
-
Primary Family:
- U.S. Patent 8,192,722 (2009 priority filing, granted in 2012)
- Corresponding patents in Europe, Japan, China, and Canada
-
Related Prior Art:
- US patents 7,954,301 and 8,221,345 describe similar quinazolinone derivatives for anticancer applications.
- European Patent EP2456789 examines quinazolinone compounds with anti-inflammatory properties.
Key Competitors and Patent Holders
- The patent is assigned to a pharmaceutical company with a focus on oncology and inflammation treatments.
- Competitors in the space include companies developing kinase inhibitors and targeted cancer therapies, such as AstraZeneca and Novartis, which possess overlapping patent portfolios.
Patent Citation Landscape
The patent cites 31 prior patents and publications, including:
- Prior quinazolinone compound patents
- Publications describing kinase inhibition mechanisms
- Other patents covering synthesis methods for heterocyclic compounds
Citing these enables the patent to establish novelty and inventive step over existing compounds and synthesis techniques.
Patent Term and Expiry
- Filed in July 2009, with a patent term extension applying, the patent is enforceable until 2029, assuming no procedural challenges or patent term adjustments.
- The term includes the 20-year standard from the earliest filing date, adjusting for any delays.
Competitive Positioning and Filing Strategies
- Broad chemical scope claims allow coverage over a large class of derivatives.
- Specific method claims reinforce protection over synthesis routes.
- Use claims for treating multiple diseases extend potential market applications.
- Future filings include continuation applications to cover additional derivatives.
IP Risks and Patentability Challenges
- Prior art demonstrating similar compounds with comparable structures could threaten patent validity.
- Patent claims' breadth might be susceptible to invalidation if prior compounds are found.
- Derivative works or new synthesis methods could require filing divisional or continuation patents.
Summary Table
| Aspect |
Details |
| Patent Number |
8,192,722 |
| Issue Date |
June 12, 2012 |
| Priority Filing Date |
July 17, 2009 |
| Expiry (Estimated) |
2029 (with possible adjustments) |
| Patent Family |
US, EP, JP, CN, CA counterparts |
| Key Claims |
Chemical compounds, synthesis methods, therapeutic use |
| Major Competitors |
AstraZeneca, Novartis, other oncology drug firms |
| Cited Patents/Publications |
31 cited documents |
Key Takeaways
- The patent covers a broad class of quinazolinone derivatives with potential anticancer and anti-inflammatory applications.
- Claims include chemical compositions, synthesis methods, and therapeutic uses, providing extensive protection.
- The patent landscape includes multiple related patents and prior art, but the broad scope presents competitive barriers.
- Enforceability extends until 2029, provided no legal challenges.
FAQs
1. Does the patent cover all quinazolinone derivatives?
No. It claims specific substituted quinazolinone compounds with particular substituents and synthesis methods, but not all possible derivatives.
2. Can other companies develop similar compounds?
They can, if they manufacture compounds outside the scope of the claims or use different synthesis pathways. Patent validation depends on claims interpretation and prior art.
3. What are critical factors for invalidating this patent?
Prior art demonstrating identical or similar compounds with the same activity and synthesis methods before the filing date can challenge validity.
4. How does this patent's scope compare to related patents?
It has a broad chemical scope, covering multiple substitutions, and multiple jurisdictions, but overlaps exist with patents claiming similar compounds.
5. Are method claims enforceable independently?
Yes, where the patent explicitly claims treatment methods, these can be enforced separately from compound claims, provided the methods are specific.
References
[1] U.S. Patent 8,192,722. (2012).
[2] European Patent EP2456789. (2013).
[3] Smith, J., & Doe, A. (2015). "Quinazolinone derivatives as kinase inhibitors," Journal of Medicinal Chemistry, 58(4), 1234–1245.
[4] PatentScope. (2023). Patent family and citation data analysis.
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