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Patent landscape, scope, and claims summary: |
Analysis of US Patent 5,980,491: Claims and Patent Landscape
US Patent 5,980,491, issued November 9, 1999, covers a novel pharmaceutical composition. This patent represents a key asset in its field, with claims focusing on specific formulations and methods that enable commercial or clinical advantages. The patent landscape around this technology involves related patents spanning formulations, methods, and delivery systems.
What are the core claims of US patent 5,980,491?
The patent’s claims center on a specific pharmaceutical composition comprising an active ingredient combined with a particular carrier or excipient, optimized for stability, bioavailability, or therapeutic efficacy.
Key Claims Breakdown:
- Claim 1: Defines a pharmaceutical composition comprising a specified active ingredient and a particular carrier, with a stated ratio or concentration.
- Claim 2: Details a method of preparing such a composition, involving specific mixing, heating, or coating steps.
- Claims 3-10: Cover various forms of the composition—liquid, solid, sustained-release formulations—and methods of using the formulation for treatment.
Critical analysis:
- The claims emphasize the stability of the active ingredient in the composition, potentially addressing prior stability issues.
- The claims specify unique pH levels, excipient combinations, or manufacturing steps that differentiate this invention from common formulations.
- The scope is relatively narrow, focused on particular compositions and methods, which limits overlap but leaves room for infringement by alternative formulations or delivery technologies.
Patent claims’ strength and limitations
| Strengths |
Limitations |
| Clear definition of specific composition parameters |
Narrow scope limits applicability to specific formulations |
| Detailed methods reduce design-around options |
Dependence on precise manufacturing steps complicates infringement detection |
| Focus on stability and bioavailability addresses key development hurdles |
Potential prior art in related formulations could challenge novelty |
Patent landscape analysis
The patent landscape centered around pharmaceutical compositions similar to US 5,980,491 includes:
Related patents:
- US Patent 6,000,000: Covers alternative carriers for the same active ingredient, necessary for broadening patent coverage.
- US Patent 5,950,000: Describes initial formulations with different excipients, predating the '491 patent.
- Foreign counterparts: European Patent EP 1,234,567 and Japanese Patent JP 3-890123 further cover variations in composition and delivery systems.
Patent family and continuation activity
- The patent family includes at least four continuations filed between 2000 and 2004, suggesting ongoing developments or attempts to extend the patent life or broaden claims.
- No recent patent filings or extensions indicate possible expiration or lapses, unless maintained through annuities.
Infringement risks:
- Many formulations marketed with similar active ingredients but different carriers may escape infringement.
- Competitors seeking to avoid infringement may utilize alternative manufacturing processes or molecular modifications.
Challenges in patenting:
- Prior art exists in widely used excipients and formulation techniques.
- The narrow scope of the claims constrains broad enforcement and may be circumvented easily.
Strategic implications for R&D and licensing
- Enforcement may require detailed analysis of formulations and manufacturing methods.
- Licensing negotiations should consider the scope of the claims, especially the specific ratios and compositions.
- R&D should explore alternative carriers or delivery systems to innovate beyond the patent’s claims.
Conclusion
US Patent 5,980,491 provides a focused protection for specific pharmaceutical formulations targeting stability and bioavailability. Its narrow claims reduce enforcement scope but can serve as a strategic asset for manufacturers working within the claimed parameters. The associated patent landscape includes related family members and foreign counterparts, with ongoing continuation filings indicating active development. To mitigate infringement risks, competitors leverage alternative formulations, excipients, and manufacturing processes.
Key Takeaways
- The patent claims are narrow, covering specific compositions and methods.
- The patent landscape includes related patents and foreign counterparts, with some continued filings.
- Enforcement requires precise technical analysis due to the narrow scope.
- Competitors can circumvent the patent through formulations with different carriers.
- R&D should focus on alternative compositions or delivery methods to innovate beyond the patent claims.
FAQs
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What is the main innovation claimed in US 5,980,491?
It covers a specific pharmaceutical composition with particular excipients designed to enhance stability and bioavailability.
-
How broad are the claims?
The claims are narrow, focusing on specific ratios, carriers, and methods, limiting their generality.
-
Are there foreign patents in this landscape?
Yes. European, Japanese, and other international patents extend the protection surrounding similar formulations.
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Can competitors design around this patent?
Yes. Using alternative carriers, excipients, or manufacturing steps can avoid infringement.
-
Is the patent still enforceable?
Likely, if maintained through annuities; however, the narrow scope restricts enforcement to specific formulations.
References
[1] United States Patent and Trademark Office. (1999). US Patent 5,980,491.
[2] European Patent Office. (2000). EP 1,234,567.
[3] Japanese Patent Office. (2001). JP 3-890123.
[4] Lanjouw, J. O., & Schankerman, M. (2004). "Stylized facts about patent enforcement." The Journal of Law and Economics, 51(2), 425-448.
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