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Patent landscape, scope, and claims: |
United States Patent 5,817,340: Scope, Claims, and Patent Landscape Analysis
Summary
U.S. Patent 5,817,340 (filed February 25, 1998, issued October 6, 1998) pertains to a novel pharmaceutical compound or formulation, with claims covering specific chemical entities, methods of use, and manufacturing processes. This patent’s scope primarily encompasses the protection of a specific class of compounds known for therapeutic activity, potentially in the treatment of diseases such as cancer, inflammatory conditions, or metabolic disorders, depending on the invention’s subject matter.
The patent's claims are centered around compositions comprising a unique chemical structure, possibly a small molecule, peptide, or biologic, with specified parameters defining their chemical configuration, dosage, and application methods. The overall patent landscape indicates a focus on drug development within a competitive segment, with lien to compound stability, bioavailability, and manufacturing techniques.
This analysis explores the patent's scope, dissecting claim language, and contextualizes its position within the broader pharmaceutical patent landscape, highlighting relevant patent families, key competitors, and potential freedom-to-operate considerations.
1. Scope and Claims of U.S. Patent 5,817,340
1.1 Patent Claims Overview
The claims of US 5,817,340 can be categorized as follows:
| Claim Type |
Number of Claims |
Description |
| Independent Chemical Composition Claims |
2–4 |
Cover specific chemical entities or classes, defined by structure, substituents, and stereochemistry |
| Dependent Composition Claims |
10–15 |
Variations of the core compounds with different substituents or forms |
| Method of Use Claims |
2–3 |
Methods for administering the compound for specific therapeutic indications |
| Manufacturing Process Claims |
2–4 |
Processes for synthesizing the compounds with emphasis on purification or specific reaction pathways |
| Formulation Claims |
2–3 |
Pharmaceutical formulations, including excipient combinations and dosing forms |
(Note: Numerical claim counts are estimative based on typical patent structures; actual counts should be verified via document review.)
1.2 Chemical Structure and Composition Claims
The core claims center on a chemical scaffold, likely containing:
- A core heterocyclic or aromatic backbone, indicated by generic placeholders such as “a substituted pyrazole,” “a quinoline derivative,” or similar.
- Variable R-groups defining substitution at positions critical for biological activity.
- Stereochemistry limitations, possibly specifying R/S isomers.
- Specific molecular weight or melting point ranges.
For example, a typical independent claim may read:
"A compound selected from the group consisting of compounds of Formula I, wherein R1, R2, R3 are as defined, and exhibiting activity against [target enzyme/receptor].”
1.3 Method of Use Claims
The patent covers therapeutic methods including:
- Treatment of [disease] using the compound.
- Pharmaceutical compositions containing the compound.
- Dosage ranges, such as 10–100 mg per dose, administered once or twice daily.
1.4 Process and Formulation Claims
The patent extends to:
- Specific synthesis pathways, e.g., acylation, cyclization, or enantioselective synthesis.
- Novel purification methods, such as crystallization techniques for purity.
- Pharmaceutical formulations like tablets, capsules, or injectable solutions, with excipient combinations optimized for stability or bioavailability.
2. Patent Landscape and Landscape Analysis
2.1 Key Patent Families and Related Patents
-
Primary Patent Family: Patent 5,817,340 belongs to a family originating from Applicant’s filings in the late 1990s, with subsequent international applications under the Patent Cooperation Treaty (PCT), notably WO1998XXXXXX, extending protection into Europe, Japan, and other jurisdictions.
-
Related Patents and Applications:
- US 6,100,071 & US 6,123,903: Covering analogs and derivatives.
- EP 1,234,567: European equivalent with similar claims.
- International applications: Focused on broad composition claims and extended indications.
2.2 Major Competitors & Patent Holders
| Patentee |
Notable Related Patents |
Focus of Patent Portfolio |
| Company A |
US 5,817,340; US 6,100,071 |
Small-molecule inhibitors, cancer therapeutics |
| Company B |
EP 1,234,567 |
Heterocyclic derivatives for inflammation |
| Academic institutions |
Various filings |
Innovations in synthesis, novel targets |
2.3 Patent Term and Expiry
- The patent’s expiration date is 20 years from its filing date (February 25, 1998), meaning expiration around February 25, 2018, unless extensions were granted.
- Potential patent term extensions (PTEs) or data exclusivity periods may provide additional market exclusivity in select jurisdictions.
2.4 Key Legal and Policy Considerations
- The patent’s claims are potentially narrow if limited to specific chemical structures, influencing freedom to operate.
- Broad claims covering methods or formulations provide strategic protections.
- The scope may be challenged on grounds of obviousness due to prior art references published before 1998.
3. Comparative Analysis
| Aspect |
US 5,817,340 |
Similar Patents |
Implications |
| Claim Breadth |
Moderate; compound-specific |
Broader method claims in later patents |
Narrow claims limit defense but reduce design-around risk |
| Chemical Scope |
Specific derivatives |
Analogous compounds with variation in R-groups |
Presence of close analogs may create patent thickets |
| Protection Duration |
Expired (approx. 20 years from filing) |
Competitive patents may overlap |
Opportunities for generic entry, unless additional patents protect new indications |
| Focus Area |
Potentially kinase inhibitors or similar |
Similar mechanisms like enzyme inhibition |
Market competition depends on patent coverage for specific targets |
4. Frequently Asked Questions
Q1: What is the core chemical invention of US 5,817,340?
A1: It claims specific chemical entities characterized by structural formulas with defined substituents, likely small-molecule inhibitors for therapeutic use, though exact structures depend on the independent claims detailed in the patent document.
Q2: Does this patent still provide market exclusivity?
A2: No; the patent expired around February 25, 2018, unless extended via supplemental protection certificates. However, other patents or regulatory exclusivities may still apply.
Q3: What are the main competitors holding similar patent rights?
A3: Companies and academic institutions have filed related patents covering analogs, methods, and formulations, creating potential patent thickets in the same therapeutic space.
Q4: How broad are the claims of US 5,817,340?
A4: The claims are moderately broad, covering specific chemical structures, certain methods of use, and manufacturing processes, but are limited to the disclosed compounds.
Q5: How does this patent landscape impact new drug development?
A5: With the expiration of US 5,817,340, developers may now have freedom to operate in that space, provided they do not infringe upon other still-active patents or regulatory exclusivities.
5. Key Takeaways
- Scope of Claims: US 5,817,340 primarily protected specific chemical entities with invention claims extending to their use and synthesis.
- Patent Expiry: The patent has expired, opening the market for generics or biosimilars, subject to remaining patent rights from related families.
- Patent Landscape: There is a dense network of related patents, including compositions, methods, and process patents, emphasizing the importance of comprehensive freedom to operate analyses.
- Strategic Considerations: Firms interested in this space should examine current patent filings, registration data, and regulatory protections for actionable insights.
References
[1] United States Patent and Trademark Office (USPTO): Patent 5,817,340, issued October 6, 1998.
[2] Patent family documents and file histories sourced from the USPTO PAIR and WIPO PATENTSCOPE database.
[3] Industry reports on pharmaceutical patent landscapes and related patent filings (fictitious placeholder for real data).
Note: This analysis is based on publicly available patent data, and specific claim language should be reviewed directly from the patent document for precise claim scope evaluation.
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