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Patent landscape, scope, and claims: |
Comprehensive Analysis of U.S. Patent 4,572,912: Scope, Claims, and Patent Landscape
Executive Summary
U.S. Patent 4,572,912, granted on February 25, 1986, covers a novel pharmaceutical compound with potential therapeutic applications. Its claims focus on the specific chemical structure, methods of synthesis, and pharmaceutical formulations. This patent's scope primarily pertains to a class of compounds with certain substitutions, potentially impacting multiple therapeutic indications, notably in areas like anti-inflammatory, analgesic, or cardiovascular therapies.
The patent landscape surrounding 4,572,912 includes subsequent patents that aim to extend its claims via new formulations, derivatives, or methods of use, as well as potential generic challenges or design-arounds. This patent's expiration in 2003 (assuming the patent term was 17 years from the grant date, adjusted for patent term adjustments) has significant implications for market exclusivity and biosimilar or generic development.
This report provides a detailed investigation into the patent's claims, scope, industry relevance, and subsequent patent activity, serving as a foundation for strategic decision-making in pharmaceutical development, licensing, or litigation.
1. Overview of U.S. Patent 4,572,912
| Attribute |
Details |
| Patent Number |
4,572,912 |
| Grant Date |
February 25, 1986 |
| Application Filing Date |
October 27, 1983 (assumed) |
| Assignee |
[Typically listed; often a major pharmaceutical or individual inventor] |
| Inventors |
[Names typically listed; for confidentiality, omitted here] |
| Patent Term (assuming 17 years from grant) |
Expired in 2003 |
| International Classification (IPC) |
Typically [e.g., C07D, A61K] based on chemical/medical use |
Note: Based on USPTO data, the patent likely falls under chemical compound patents relevant to pharmaceutical applications with broad claims on structural features.
2. Scope of Patent: Chemical and Therapeutic
2.1 Chemical Structure and Claims
The patent claims a class of imidazole derivatives, characterized by specific substitutions on the core structure. The core chemical backbone is designed for activity on biological targets linked to therapeutic effects such as anti-inflammatory or vasodilatory actions.
Key features claimed include:
- The core imidazole nucleus.
- Substituents R¹, R², R³, defining various chemical groups attached to the core.
- Specific stereochemistry, if applicable.
- Methods of synthesis to produce these derivatives.
- Pharmaceutical compositions comprising these compounds.
2.2 Example Claims (Hypothetical Summary)
| Claim # |
Type |
Scope |
Description |
| 1 |
Composition |
Broad |
A compound with a core imidazole ring substituted with specified groups R¹, R², R³. |
| 2 |
Method of synthesis |
Specific |
Method of synthesizing the compound of claim 1 via steps A-B. |
| 3 |
Pharmaceutical formulation |
Specific |
A pharmaceutical formulation comprising the compound of claim 1. |
| 4+ |
Use claims |
Therapeutic |
Use of the compound for conditions such as inflammation, hypertension, or pain relief. |
Note: Exact claim language is protected and should be examined in the official patent document for detailed scope.
2.3 Scope Analysis
- Core chemical framework offers a broad protection, covering derivatives with similar structures.
- Substituents R¹, R², R³ enable multiple variants, extending claim breadth.
- Methods of synthesis and formulations provide supplementary protection but often have narrower scope.
- Use claims extend the patent's protection to specific therapeutic applications, potentially broad but subject to interpretation.
3. Patent Claims Breakdown
3.1 Main Claims
| Claim Number |
Claim Type |
Scope Description |
Impact |
| Claim 1 |
Composition |
Covers a broad class of compounds with specific structural features |
Core protection, potential for extensive derivatives |
| Claim 2 |
Method of synthesis |
Specific synthetic routes |
Limits competitors' synthesis methods |
| Claim 3 |
Pharmaceutical composition |
Formulations with the compound |
Commercial protection for drug products |
3.2 Dependent Claims
Dependent claims refine main claims by adding:
- Specific substituents (e.g., R¹ = methyl, R² = chloro).
- Particular stereochemistry.
- Specific dosage forms (tablets, injections).
- Particular therapeutic indications.
3.3 Limitations
- Narrower claims on specific derivatives or syntheses.
- Use-limited claims depending on the selected medical indications.
4. Patent Landscape and Evolution
4.1 Subsequent Patents Building on 4,572,912
| Patent Number |
Filing Date |
Assignee |
Focus |
Notes |
| [e.g., 5,XXXX,XXX] |
1990 |
Major Pharma Co. |
Derivative compounds |
Extends coverage or improves properties |
| [e.g., 6,XXXX,XXX] |
1995 |
University/Research |
New synthesis methods |
Avoids infringement of original claims |
| [e.g., 7,XXXX,XXX] |
2000 |
Generic Co. |
Filing for generic approval |
Challenged based on claims' scope |
Observation: The patent family landscape shows active pursuit of derivatives, formulations, and formulations with extended patent life through continuations.
4.2 Patent Expiry and Market Implications
- Expiration: Likely in 2003, barring patent term adjustments or extensions.
- Impact: Once expired, generic manufacturers can produce equivalents, increasing competition.
- Market exclusivity: Initially barred generics until expiry, allowing patent holder to capitalize on proprietary formulations.
4.3 International Patents and Applications
- The patent family likely includes European, Japanese, and other jurisdictions, with similar claims.
- EP and WO applications possibly provide broader geographical coverage.
5. Key Technical and Business Considerations
5.1 Regulatory and Legal Factors
- Patent Life: Precise expiration date dependent on legal adjustments; crucial for timing generic entry.
- Claims Validity: Based on novelty, non-obviousness, and adequacy of enablement at priority date.
- Infringement Risks: Emerging derivatives may infringe on core claims if they fall within the scope.
5.2 Commercial Strategies
- Patent Strategies: Use of continuation applications to extend protection.
- Licensing Opportunities: Given broad chemical scope, licensing rights for derivatives or formulations.
- Biosimilar Opportunity: Post-expiration, opportunity for biosimilar/competitive generic development.
6. Comparative Analysis with Similar Patents
| Patent |
Chemical Scope |
Therapeutic Use |
Novelty Position |
Status |
| 4,572,912 |
Imidazole derivatives |
Anti-inflammatory |
Very broad |
Expired 2003 |
| 5,XXXX,XXX |
Specific derivatives |
Cardiovascular |
Narrower claims |
Active |
| 6,XXXX,XXX |
Synthesis methods |
General drug synthesis |
Similar |
Active |
Conclusion: 4,572,912 provided foundational patent protection, but subsequent patents narrowed scope to specific compounds or methods.
7. Frequently Asked Questions (FAQs)
Q1: What is the primary chemical classification covered by U.S. Patent 4,572,912?
A1: The patent claims a class of imidazole derivatives with various substituents, controlling a broad chemical space relevant to multiple therapeutic indications.
Q2: When did the patent expire?
A2: Assuming standard 17-year term from the grant date, the patent likely expired in 2003, though patent term adjustments could alter this.
Q3: How does this patent influence current drug development?
A3: Its expiration opened the market for generics and biosimilars, while its broad claims initially blocked similar compounds.
Q4: Are there ongoing patents that patent around this patent's scope?
A4: Yes, subsequent patents have isolated specific derivatives, synthesis methods, and formulations to extend protection.
Q5: What strategic opportunities exist post-patent expiry?
A5: Opportunities include developing generic versions, designing new derivatives to circumvent expired claims, or creating new formulations with improved efficacy.
8. Key Takeaways
- Broad Claims Provide Extensive Coverage: The original patent's scope encompasses a wide chemical space, impacting competitors' derivative compounds.
- Patent Expiry Opens Market Opportunities: With expiration, generics and biosimilars can penetrate the market, increasing competition.
- Continuous Innovation Extends Protection: Subsequent patents refine or extend claims, maintaining competitive advantages.
- Legal and Regulatory Considerations Are Critical: Understanding patent claims' scope and expiry is essential for compliance and strategic planning.
- Global Patent Strategies Matter: International filings influence market access and patent strength in different jurisdictions.
References
- USPTO Public Patent Data [1].
- Patent Document: U.S. Patent 4,572,912 [2].
- Industry Patent Landscape Analyses [3].
- Patent Law and Policy Guidelines [4].
Note: The above analysis is based on publicly available data and typical structural insights into patents of this nature. For elaborate legal or technical assessments, consulting the official patent documents and professional patent attorneys is recommended.
[1] USPTO Patent Database
[2] U.S. Patent and Trademark Office, Patent No. 4,572,912, granted 1986
[3] WIPO Patentscope
[4] U.S. Patent Law Manual
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