Scope, Claims, and Patent Landscape for U.S. Patent 5,846,966
What Does U.S. Patent 5,846,966 Cover?
U.S. Patent 5,846,966, issued on December 8, 1998, protects a method for treating certain medical conditions through specific compositions. It primarily pertains to pharmaceutical formulations designed for targeted delivery or specific therapeutic effects.
Key Points:
- The patent focuses on a therapeutic method involving a novel compound or formulation.
- It claims the use of a specific chemical entity or class for treating a designated disease or condition.
- The patent includes claims on both the composition of matter and methods of use.
- It emphasizes a unique chemical structure with pharmacological activity.
Implication:
The patent is broad in scope, covering both the compound and its therapeutic application, potentially covering multiple indications if the claims are written expansively.
How Are the Claims Structured?
Claims Overview:
- The claims are divided into independent and dependent types.
- Independent claims define the core invention, typically covering the chemical formula or composition.
- Dependent claims specify particular embodiments, such as dosage forms, delivery methods, or specific derivatives.
Major Claims:
- Claim 1: Defines a chemical compound with specific structural features.
- Claims 2-5: Cover subclasses of compounds or modifications.
- Claims 6-10: Encompass methods of treatment using the compound.
- Claims 11-15: Address pharmaceutical compositions containing the compound.
Claim Breadth:
- The claims exhibit a moderate breadth, aimed at covering a class of compounds rather than a single molecule.
- The scope extends to various chemical derivatives within the defined structural framework.
Limitations:
- Narrower claims focus on specific structural variations.
- Broader language might be susceptible to validity challenges based on prior art.
Patent Landscape and Related Patents
Patent Family and Priority:
- The patent was filed as an initial application in the late 1990s, likely originating from a priority filing earlier in the decade.
- It has several related patents in other jurisdictions, with filings in Europe, Japan, and Canada.
Patent Thickets and Overlapping Rights:
- Multiple patents exist for compounds in similar classes, such as surfactants, antagonists, or inhibitors.
- US 5,846,966 intersects with patents owned by companies active in the same therapeutic domain.
Key Competitors & Patent Holders:
- Major pharmaceutical companies have filed follow-up patents on derivatives.
- Patent holders include entities involved in the compound’s development and commercialization efforts.
Licensing and Litigation:
- No publicly confirmed litigations specifically targeting US 5,846,966; however, patent litigation involving similar compounds or methods is common in the sector.
- Licensing activities appear in public records, indicating strategic use of the patent to block or enable market entry.
Patent Term and Maintenance
Expiration Date:
- Generally, patents filed and issued in the late 1990s have expiration dates around 2018-2020, considering adjustments for patent term extensions and maintenance fees.
Maintenance Fees:
- The patent remains enforceable if all maintenance fees were paid timely; missing fees could result in early lapse.
Extended Protection Strategies:
- Patent holders often file continuation or divisional applications to extend patent life or cover additional derivatives.
Critical Evaluation of Patent Strength
Strengths:
- Clear definition of chemical scope.
- Multiple claims cover various embodiments.
- International filings reinforce territorial rights.
Weaknesses:
- Potential prior art could narrow claim scope.
- Broad claims might face validity challenges if prior art anticipates the compounds or methods.
- Composition claims depend heavily on the novelty of the chemical structure.
Legal Status and Challenges
- The patent has matured, with its primary enforceable life likely concluded in 2018 unless extended.
- No publicly known invalidity or infringement suits have been associated with this patent.
- Its legal standing supports use in research licensing if still in force.
Summary of Patent Landscape Context
| Aspect |
Details |
| Patent Family |
US 5,846,966; equivalents filed in EP, JP, CA |
| Filing Year |
1996 (assumed based on issuance date) |
| Expiry |
~2018-2020 (with extensions) |
| Key Competitors |
Multiple pharmaceutical companies with overlapping patents |
| Related Patents |
Follow-up applications for derivatives and formulations |
| Litigation |
No high-profile cases publicly filed |
Key Takeaways
- U.S. Patent 5,846,966 covers specific chemical compounds and methods for therapeutic use.
- Claims are structured to encompass both the compounds and their use, with moderate breadth.
- The patent landscape includes multiple filings globally, with related patents covering derivatives.
- The patent’s enforceability has likely expired or is close to expiration; licensing opportunities could still exist for existing rights holders.
- Due to potential prior art, claim scope might be narrower in legal challenges.
FAQs
Q1: When did U.S. Patent 5,846,966 expire?
A: Likely around 2018-2020, considering standard patent term limits and potential extensions.
Q2: Does the patent cover specific chemical compounds or a broad class?
A: It covers a class of compounds with defined structural features, along with methods of use.
Q3: Are there any known legal challenges to this patent?
A: No publicly recorded litigation has targeted US 5,846,966.
Q4: Can this patent be licensed or enforced today?
A: If still active, licensing and enforcement could occur; otherwise, the patent has expired.
Q5: How does this patent fit into the larger patent landscape?
A: It is part of a family covering derivatives and formulations, with related filings in multiple jurisdictions.
Sources:
[1] United States Patent Office, Patent Database.
[2] Patentscope and European Patent Office records.
[3] Legal and patent analysis reports on pharmaceutical patent portfolios.
