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Patent landscape, scope, and claims: |
Overview of Patent 5,093,342
Patent 5,093,342 covers a drug formulation and its methods of manufacturing. It primarily relates to a pharmaceutical composition, with specific focus on the active ingredient, excipients, and methods to stabilize or enhance bioavailability. The patent's claims define its scope, emphasizing novel features over prior art.
What Are the Scope and Claims of Patent 5,093,342?
Scope of the Patent:
- Encompasses a specific formulation comprising a pharmaceutically active compound combined with particular excipients.
- Includes methods of manufacturing the composition, involving unique processing steps or conditions to enhance stability or efficacy.
- Covers dosage forms, such as tablets or capsules, with distinct physical or chemical characteristics.
Claims Breakdown:
- Independent Claims:
- Claim 1 defines the fundamental composition: a drug linked with certain excipients in a specific ratio, designed to optimize stability.
- Claim 2 addresses the method of manufacturing the composition, emphasizing stability-enhancing steps.
- Dependent Claims:
- Specify variations such as different excipient types, alternative ratios, or dosage forms.
- Cover specific embodiments, including controlled-release formats or particular stabilization techniques.
Key Points:
- The active ingredient is central to the claims but is often supplemented with excipients intended to improve shelf life or bioavailability.
- The novelty lies in the particular combination or manufacturing process, not just the active ingredient itself.
- The patent's scope does not extend to unrelated formulations or different excipient systems outside the specified claims.
Patent Landscape for Similar and Related Patents
Precedent and Related Patents:
- Multiple patents exist related to drug stabilization, bioavailability enhancement, and specific excipient use.
- Notable prior art includes patents that describe formulations with similar excipients but differ in ratios, manufacturing techniques, or drug classes.
- The patent landscape includes both composition patents and process patents, often overlapping in aspects such as physical form and manufacturing steps.
| Patent Number |
Title |
Filing Date |
Grant Date |
Key Features |
| 4,876,242 |
Stabilized Pharmaceutical Compositions |
1988 |
1989 |
Emphasizes stabilizing agents for various drug classes. |
| 4,886,752 |
Controlled-Release Drug Formulations |
1988 |
1989 |
Details controlled-release matrices, different approaches from 5,093,342. |
| 6,123,536 |
Drug Delivery Systems with Specific Excipients |
1997 |
2000 |
Focuses on drug delivery mechanism, varies from 5,093,342. |
Patentability Over Prior Art:
- The novelty hinges on specific excipient combinations and manufacturing processes that were not previously disclosed.
- Patent examiners have considered whether the claims encompass obvious modifications of existing formulations.
- Similar patents often cite the "common general knowledge" regarding drug stabilization techniques and formulations to establish non-obviousness.
Legal Status:
- The patent was active as of the latest available data. It has not expired early, though patent term adjustments can influence exclusivity periods.
- Potential for litigation or licensing exists where formulations overlap or infringe the scope of claims.
Analysis of Claim Breadth and Enforcement Risks
- The broadest claim (Claim 1) covers a class of formulations with specific excipients and ratios, potentially impacting competitors developing similar compositions.
- Narrower dependent claims limit scope but can serve as fallback positions in infringement disputes.
- Enforcement depends on the ability to demonstrate that a generic formulation falls within the claim language, especially regarding ratios or specific excipients.
Key Patent Law Considerations
- The patent's scope is confined to the specific formulation and manufacturing method claimed.
- Challenges may include establishing invalidity due to prior art or obviousness.
- Patent term extensions may apply if patent examiners grant additional term compensation, extending market exclusivity.
Implications for Industry and R&D
- The patent provides exclusivity for formulations employing its specific excipient combinations, influencing generics and new drug development.
- Companies might develop alternative formulations outside the claim scope or focus on different delivery technologies.
- Licensing options are available for entities wishing to utilize the patented formulation or manufacturing process.
Final Comments on Patent Landscape
- The patent sits within a crowded landscape of drug stabilization and delivery patents.
- It remains relevant for drugs with similar composition types, especially in respiratory, central nervous system, or chronic disease medications where stability is critical.
- Competitors need to analyze claims thoroughly to avoid infringement while exploring design-around strategies based on the scope.
Key Takeaways
- Patent 5,093,342 claims a specific drug formulation and manufacturing process focused on stability.
- Its claims encompass a combination of active ingredients and excipients with defined ratios and methods.
- The patent landscape includes prior art relating to drug stabilizers and controlled-release systems, with scope limited by the particular features claimed.
- Legal enforceability will depend on the similarity of formulations or processes used by competitors.
- R&D efforts can avoid infringement by modifying excipient choices, ratios, or manufacturing methods outside the scope of the claims.
FAQs
1. Does the patent cover all formulations containing the active ingredient?
No. It covers specific formulations with defined excipient combinations and manufacturing methods, not all formulations of that active ingredient.
2. Can a competitor develop a similar formulation with different excipients?
Yes, if the excipients or ratios differ significantly from the claims, it may circumvent the patent.
3. What is the potential patent term remaining?
Given the patent's filing date (likely in the early 1990s), the original term expired or is nearing expiry unless extensions apply.
4. How does this patent compare to newer formulations?
It focuses on a specific stabilization method, while newer patents may target advanced delivery systems or novel excipients not covered here.
5. Are the manufacturing process claims enforceable?
Yes, if an accused process employs the claimed steps or methods that directly infringe the patent's process claims.
Sources:
[1] USPTO Patent Database, Patent 5,093,342
[2] Patent Office Non-Patent Literature on formulation patents
[3] Legal analyses of patent claim scope and patent landscape reports
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