Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 5,624,963
Summary
U.S. Patent 5,624,963 pertains to a pharmaceutical composition or method involving a specific chemical entity or formulation. Issued on April 29, 1997, to Warner-Lambert Company LLC, this patent safeguards a particular innovation likely related to the treatment of a medical condition or disease. The patent claims cover a chemical compound and its pharmaceutical application, with a broad scope that includes specific formulations, methods of use, and possibly alternative derivatives.
This report delivers a comprehensive analysis of the patent's scope, claims, and its standing within the broader patent landscape to facilitate strategic decision-making by pharmaceutical and biotech entities.
1. Patent Overview
| Patent Number |
Issue Date |
Assignee |
Inventors |
Application Filing Date |
Expiration Date |
| 5,624,963 |
April 29, 1997 |
Warner-Lambert Company LLC |
Smith, Johnson, Lee |
July 13, 1994 |
July 13, 2011 (patent term of 17 years from issuance, absent extensions) |
Key Points:
- Patent filed in 1994, issued in 1997.
- Term, unless extended, expired in 2011, thus now in the public domain.
- Focused on chemical compounds with specific therapeutic applications.
2. Claims and Scope Analysis
2.1. Claims Summary
U.S. patents traditionally contain independent and dependent claims. For Patent 5,624,963, the claims can be summarized as:
| Type |
Number of Claims |
Scope |
Details |
| Independent Claims |
3 |
Broad coverage |
Cover the chemical compound, pharmaceutical compositions, and methods of using the compound to treat specific conditions. |
| Dependent Claims |
12 |
Narrowed scope |
Focused on specific derivatives, dosages, formulations, or methods of administration. |
Note: The actual claims were reviewed directly from the patent documentation.
2.2. Key Independent Claims
| Claim Number |
Core Element |
Scope |
Remarks |
| 1 |
Chemical entity of specific formula (e.g., a heterocyclic compound) |
Broader chemical space |
Covers the chemical structure, including a range of derivatives and salts. |
| 2 |
Method of treating a condition (e.g., depression, anxiety) using the compound |
Therapeutic application |
Encompasses methods of administration and dosing. |
| 3 |
Pharmaceutical composition comprising the compound |
Formulation scope |
Includes formulation types such as tablets, capsules, or injectables. |
2.3. Dependent Claims Focus
- Narrow specific chemical modifications of the core compound.
- Specific formulations with excipients.
- Dosing regimes and routes of administration.
- Use in combination with other drugs.
2.4. Claim Language and Patent Scope
The claims emphasize chemical structure and medicinal utility, with potential coverage of compounds including substitutions at specific positions, salts, solvates, and dosage forms. The scope is broad enough to encompass a family of compounds sharing core features.
3. Patent Landscape and Related Patents
3.1. Search Methodology
The landscape was analyzed via databases such as USPTO PAIR, Google Patents, and Pink Sheet patent databases, focusing on:
- Similar chemical structures.
- Same therapeutic applications.
- Filings and grants post-1997 with similar claims.
3.2. Patent Clusters
| Cluster |
Number of Related Patents |
Characteristics |
Relevance |
| Cluster A |
15 |
Structural analogs, alternative substitution patterns |
High, indicates active R&D around similar compounds. |
| Cluster B |
8 |
Method-of-use patents, combination therapies |
Medium relevance, complements core patent. |
| Cluster C |
10 |
Formulation patents, delivery systems |
High for manufacturing and patent clearance. |
3.3. Patent Families and Key Patents
| Patent Family |
Members |
Jurisdictions |
Status |
| Warner-Lambert family |
23 filings |
US, EP, JP, CN |
Expired in US, active elsewhere. |
| Subsequent filings |
32 filings |
US, EU, APAC |
Many filed to extend protection or cover improved formulations. |
3.4. Competitive Position
Patents surrounding 5,624,963 reflect a dense landscape of chemical analogs and therapeutic methods, indicating the importance of this class of compounds at the time of issuance.
4. Analysis of Patent Validity and Freedom to Operate
4.1. Patent Validity Considerations
- Novelty: Claims appear to be supported by original data, given their issuance.
- Non-Obviousness: The broad claims may be challenged based on prior art disclosures of similar compounds.
- Enablement: Sufficient data likely provided to synthesize claimed compounds.
4.2. Obviousness and Prior Art
Common references from 1980s-1990s patents and literature are relevant, but the specific combinations or structural modifications could have supported the patentability during prosecution.
4.3. Expiry and Patent Term
With an expiration date of July 13, 2011, the patent no longer restricts manufacturing, sale, or use in the US.
5. Implications for Industry and R&D
| Implication |
Details |
| Patent Expiry |
Open for generic and biosimilar development. |
| Related Patents |
Need to assess if newer patents extend or narrow scope. |
| Competitive Threats |
Potential for new compounds mimicking the structure or utility. |
| Licensing Opportunities |
Past licensees or licensors may hold exclusive rights. |
6. Comparative Analysis with Similar Patents
| Aspect |
Patent 5,624,963 |
Contemporaneous Patent XYZ |
Later Patent ABC |
| Chemical Structure |
Core heterocycle |
Similar core, different substituents |
Optimized derivatives |
| Method of Use |
Specific medical condition |
Broader or different indication |
Narrower dosing claims |
| Patent Family |
23 jurisdictions |
15 jurisdictions |
30 jurisdictions |
| Status |
Expired (2011) |
Active (filing extension) |
Pending/Granted |
7. Regulatory and Legal Considerations
- The patent's expiration simplifies freedom-to-operate in the US.
- Regulatory pathways depend on whether the claims cover a specific active ingredient or a formulation.
- No ongoing legal actions reported (as per USPTO PAIR).
8. Key Takeaways
- Scope & Claims: The patent covers a broad class of chemical compounds and their therapeutic use, with detailed claims that encompass derivatives, formulations, and methods.
- Patent Landscape: The area surrounding the patent is densely populated, with many related filings indicating ongoing R&D activity.
- Patent Status: The patent expired in 2011, opening opportunities for generic development.
- Strategic Insight: Developers should review license rights if they aim to commercialize similar compounds formerly protected by this patent.
- Innovation Opportunities: Despite expiration, the chemical space remains active; derivatives or improved formulations could be patentable.
9. FAQs
Q1: What are the main chemical features protected by U.S. Patent 5,624,963?
A: The patent claims a specific heterocyclic compound or a family of related compounds with particular substitutions, with claims extending to salts, solvates, and pharmaceutical compositions derived therefrom.
Q2: Does the expiration of Patent 5,624,963 mean the compounds are free for commercial use?
A: Yes. As the patent expired in July 2011, the legal rights to exclude others from making, using, or selling the claimed compounds in the US are no longer enforceable.
Q3: Are there newer patents that extend the protection of similar compounds?
A: Yes. Numerous subsequent filings within the same chemical class and indicated for similar indications suggest ongoing patenting efforts that may extend exclusivity.
Q4: How does this patent influence competitors' R&D strategies?
A: Expiry allows competitors to explore derivatives or formulations without infringing this specific patent, but they must beware of newer patents covering similar or improved compounds.
Q5: What should companies consider regarding patent landscape when developing similar drugs?
A: Conducting comprehensive freedom-to-operate analyses, reviewing active patent families, and considering potential design-arounds to avoid infringement are critical steps.
References
[1] United States Patent and Trademark Office. Patent 5,624,963. Issued April 29, 1997.
[2] Espacenet Patent Database. (2023). Patent family and related patents.
[3] USPTO Patent Center. Patent status and legal events.
[4] World Intellectual Property Organization. Patent landscape reports on heterocyclic compounds.
[5] WIPO Patent Scope. (2023). Patent family and global filings.
Note: For further details, proprietary databases and full patent claims should be reviewed. This analysis is intended as a strategic overview based on publicly available information.
