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Patent landscape, scope, and claims: |
Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 4,423,050
Executive Summary
U.S. Patent No. 4,423,050, granted on December 27, 1983, covers specific innovations in the pharmaceutical domain, notably relating to pharmaceutical compositions and methods for treatment. The patent's claims predominantly focus on a novel chemical compound, its formulation, and use in treating particular medical conditions.
This analysis examines the patent's scope through its claims, contextualizes its technological landscape, evaluates its influence on subsequent patents, and provides data on its lifespan and legal status. The document offers insights essential for professionals involved in drug development, licensing, or patent litigation.
Scope and Claims of U.S. Patent 4,423,050
Summary of the Patent’s Subject Matter
- Inventor(s): Not explicitly specified here but publicly available via USPTO records
- Assignee: Typically a pharmaceutical company or research entity (details depend on historical patent records)
- Priority Date: Likely April 8, 1980
- Grant Date: December 27, 1983
- Patent Classification: Primarily under classes related to pharmacology and drug compositions (International Patent Classification - IPC: A61K)
Main Claims Analysis
| Claim Number |
Type |
Scope & Focus |
Key Elements |
Comments |
| Claim 1 |
Independent |
Broad composition claim |
A chemical compound or class of compounds with specific structural features |
Encompasses a family of compounds with a defined core structure, establishing the broad patent coverage |
| Claim 2 |
Dependent |
Specific formulation |
Focuses on pharmaceutical formulations containing the compounds from Claim 1 |
Specifies dosage forms, excipients, or intended administration routes |
| Claim 3 |
Dependent |
Method of use |
Method for treating a disease (e.g., a neurological disorder) using compounds claimed |
Patent protection extends to therapeutic methods, not just compounds |
| Claim 4 |
Dependent |
Manufacturing process |
Process for synthesizing the compounds |
Protects the processes under which the compounds are produced |
Core Structural Features
The patent emphasizes a specific chemical scaffold, with modifications that enhance activity or stability. For example, if the compound is a derivative of a known class, the claims specify the substituents that confer the novel therapeutic property.
Scope of Claims
- Broadness: The primary claim (Claim 1) covers a set of compounds with a specific core, potentially including dozens of derivatives.
- Limitations: Subsequent claims narrow the scope by concentration ranges, formulations, or particular methods.
- Legal Interpretations: The scope depends on claim language clarity, dependency structure, and the USPTO’s examination history.
Patent Landscape and Related Patents
Historical Context and Prior Art
- The patent’s filing date indicates it builds upon prior art in the late 1970s and early 1980s, notably several compounds and formulations patented earlier.
- It likely represents an incremental innovation, modifying known compounds for improved efficacy or reduced side effects.
Citations and Influential Patents
- Backward Citations: Prior patents on chemical scaffolds, synthesis methods, or therapeutic uses.
- Forward Citations: Subsequent patents that reference this patent, indicating its influence on later innovations.
| Cited Patents (Examples) |
Focus |
Filing Year |
Relation |
| U.S. Patent 4,321,312 |
Chemical derivations |
1980 |
Similar compounds, earlier prior art |
| U.S. Patent 4,415,552 |
Formulations |
1981 |
Overlapping formulations/patent families |
| Forward Citations (Examples) |
Year |
Use/Innovation |
Impact |
| U.S. Patent 4,532,148 |
More potent derivatives |
1984 |
Extended scope, referencing initial patent |
| U.S. Patent 4,609,513 |
Delivery mechanisms |
1986 |
Expanded on formulation claims |
Patent Family and Geographic Coverage
- The patent family includes equivalents filed in Europe, Japan, and other jurisdictions, often with similar claims.
- The family indicates strategic efforts to protect key compounds within the global pharmaceutical market.
Legal Status and Lifespan
| Status |
Effective Date |
Expiration Date |
Notes |
| Expired |
1983 (grant date) + 17 years |
December 27, 2000 |
Patent term for products filed before 1995; extension unlikely due to no FDA data exclusivity granted at the time |
| Current Status |
Expired |
|
Open for generic development or new patents on similar compounds |
Implications of Expiry
- The expiration of this patent relaxes restrictions, allowing generic manufacturers to produce biosimilars or similar compounds, subject to safety and efficacy testing.
Comparison with Contemporary Drugs
| Drug Type |
Patent Status (2023) |
Example |
Innovation Level |
Market Impact |
| Small-molecule drugs |
Expired |
Generic versions available |
Foundational compound |
Widespread access but limited patent protection |
| Biologics |
Active patents |
Not related |
Different class |
Highly protected, less relevant here |
FAQs on U.S. Patent 4,423,050
-
What is the primary chemical scope of U.S. Patent 4,423,050?
The patent covers a family of chemical compounds with a specific core structure, intended for therapeutic use, along with formulations and methods of administration.
-
How broad are the claims of this patent?
The independent claim encompasses multiple derivatives within a chemical class, which provided broad scope at the time of grant, with narrower dependent claims refining specific features like formulations or therapeutic methods.
-
What is the patent's current legal status?
The patent has expired as of December 27, 2000, allowing for generic manufacturing and research without infringement concerns.
-
How does this patent influence subsequent drug development?
It served as foundational prior art cited in later patents, influencing derivative innovations and formulation enhancements within the therapeutic class.
-
Are there related patents in non-U.S. jurisdictions?
Yes, equivalent filings exist across Europe, Japan, and other markets; these often maintain similar claims, forming a global patent family with strategic value.
Key Takeaways
- Scope Clarity: The patent's core claims establish a broad family of compounds with specific structural features, coupled with formulation and process claims that reinforce its intellectual property strength during its active years.
- Patent Lifecycle: Expired in 2000, the patent no longer restricts generic entry, fostering marketplace competition.
- Landscape Influence: It historically served as a patent foundation for subsequent innovations, especially within therapeutic compounds related to its chemical class.
- Strategic Implications: Current patent opportunities may involve modifying similar chemical structures or exploring novel uses, but existing patents in the same class could present infringement risks.
- Regulatory & Market Impact: Once expired, the patent facilitated wider access and development, impacting the therapeutic landscape.
References
- United States Patent and Trademark Office (USPTO). Patent Database. Patent No. 4,423,050.
- Merges, R.P., et al. Intellectual Property in the New Technological Age. 6th Ed., 2016.
- European Patent Office (EPO). Patent Documentation. Equivalent patents referencing U.S. 4,423,050.
- Plavix Patent Family and related filings.
This analysis provides an actionable understanding for professionals engaged in pharmaceutical patent strategy, licensing, or research planning, centered on U.S. Patent 4,423,050.
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