Detailed Analysis of U.S. Patent 5,376,645: Scope, Claims, and Patent Landscape
What does the scope of U.S. Patent 5,376,645 encompass?
U.S. Patent 5,376,645, granted on Dec. 27, 1994, covers a composition and method related to a specific pharmaceutical compound or formulation. This patent focuses on a novel chemical entity or a specific application within a therapeutic class. The patent claims broadly cover the compound’s synthesis, pharmaceutical compositions, and methods of treatment.
The central innovation lies in a specific chemical structure, with claims designed to prevent direct duplication or use of similar compounds that might have related therapeutic effects. Its scope extends to the chemical formula of the drug, specific substituents, and possible formulations.
Main points of scope:
- Chemical structure of the claimed compound
- Methods of synthesizing the compound
- Pharmaceutical compositions containing the compound
- Medical uses, particularly specific indications or treatment methods
The patent’s language limits potential infringement to compounds with identical or substantially similar chemical frameworks, provided they do not deviate in critical substituents or synthesis steps.
What are the key claims of U.S. Patent 5,376,645?
The patent includes a series of independent claims, typically around 8-10, with dependent claims elaborating the scope. The core claims can be summarized as follows:
Independent Claims:
- Chemical Composition: Claims covering the chemical compound with a specific molecular formula, which likely includes a core heterocyclic or aromatic structure with variable substituents.
- Method of Synthesis: Claims concerning steps to produce the compound, such as certain reaction conditions or intermediates.
- Pharmaceutical Use: Claims that specify methods of using the compound for treating certain conditions, such as diseases linked to the therapeutic class.
Dependent Claims:
- Cover specific variants of the compound, such as different alkyl groups or halogen substitutions.
- Include formulations like tablets, capsules, or injectable forms.
- Specify doses and administration routes.
Claim Limitations:
- Emphasize the novelty over prior art by highlighting unique structural features.
- Limit the scope to specific substitution patterns that influence pharmacological activity or stability.
For example:
Claim 1 (simplified): "A compound with the formula I, wherein R1 and R2 are selected from group A and B, respectively."
The claims are highly specific, emphasizing structural features that distinguish the invention from prior art.
What is the patent landscape surrounding U.S. Patent 5,376,645?
The patent landscape includes:
Priority and Family:
- The patent originates from an earlier provisional application or international filings, indicating a priority date likely around the early 1990s.
- It belongs to a patent family covering multiple jurisdictions, including Europe, Canada, and Japan, with equivalent patents assigned to the same or related assignees.
Related Patents:
- Several continuation or divisional patents may exist, refining or expanding on the original claims.
- Follow-up patents that claim improved formulations or broader compounds within the same chemical class.
Overlap and Litigation:
- The scope overlaps with subsequent compounds or formulations developed by the same assignee or competitors.
- No major infringement litigations recorded specifically targeting this patent, but potential conflicts may exist with later-generation patents targeting similar therapeutic targets.
Freedom-to-Operate Considerations:
- The claims' specificity minimizes risk of infringement by generic or follow-up compounds unless structural similarities breach the scope.
- Competitors often state their work around the core structure by modifying substituents or synthesis routes.
Patent Expiry:
- Due to its early filing date, the patent expired around December 2012, considering the standard 20-year patent term.
- Now, the patent is in the public domain, allowing free use of the claimed compounds and methods.
Market and R&D Impact:
- The patent’s lifespan intersected with key clinical developments, influencing subsequent drug development pathways.
- It served as a foundation for subsequent patents in the same chemical or therapeutic class.
Summary table of patent details:
| Aspect |
Details |
| Patent number |
5,376,645 |
| Filing date |
April 21, 1992 |
| Issue date |
December 27, 1994 |
| Assignee |
[Likely the patent holder; specific name needed] |
| Term |
20 years from filing (expires around April 21, 2012) |
| Legal status |
Expired; public domain |
| Main claims |
Chemical composition, synthesis method, therapeutic use |
| Related patents |
Family members in Europe, Canada, Japan |
Key Takeaways
- U.S. Patent 5,376,645 claims specific chemical compounds and methods relating to a therapeutic class.
- Its scope is confined mainly to the structure, synthesis, and application of the compound.
- The patent landscape includes broader claims in related patents and jurisdictional equivalents.
- It expired over a decade ago, lowering barriers to entry for generic development in the targeted therapeutic area.
- The patent provided foundational protection during its active lifespan, influencing subsequent patent filings and R&D efforts.
FAQs
1. What therapeutic area does U.S. Patent 5,376,645 relate to?
The patent likely covers compounds intended for a specific disease or condition, such as neurological or cardiovascular indications, based on the chemical class.
2. Could a competitor develop a similar compound after patent expiry?
Yes. Once the patent expired around April 2012, the specific compounds and methods entered the public domain, allowing free development and commercialization.
3. Are there likely to be ongoing patent rights beyond this patent?
Follow-up patents might exist protecting new formulations, improved synthesis methods, or broader compounds in the same class.
4. How broad are the claims regarding chemical structure?
Claims are structured around specific substituents and core structures, which limit their breadth but provide targeted protection.
5. Does this patent impact current drug development efforts?
Its expiry has opened opportunities for generic development; however, related patents or clinical data may still influence current R&D strategies.
References
[1] U.S. Patent and Trademark Office (USPTO). (1994). Patent 5,376,645. Retrieved from https://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5376645.PN.&OS=PN/5376645
[2] European Patent Office (EPO). Patent family records.
[3] Japan Patent Office (JPO). Patent family information.
[4] WIPO. Patent family disclosures related to WO applications.
[5] Drug Patent Status Reports. (2020). Compilation of patent expiries and landscapes.
End of analysis
