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Patent landscape, scope, and claims: |
Scope, Claims, and Patent Landscape of US Patent 5,914,396
What is the scope of US Patent 5,914,396?
US Patent 5,914,396 covers a novel drug compound and its therapeutic applications. The patent claims a specific chemical entity, its pharmaceutically acceptable salts, and methods of its synthesis. It aims to secure exclusivity over a class of compounds useful for treating a particular medical condition—most notably, a disease linked to the modulation of a specified biological pathway. The patent asserts product claims directed at the compound itself and method claims related to its use in treating said condition.
The patent also encompasses formulations comprising the compound, such as oral, injectable, or topical forms. It specifies the use of the compound as a pharmacologically active ingredient, including methods of administration, dosage levels, and combination therapies.
What are the primary claims of US Patent 5,914,396?
The patent contains a series of claims categorized into product claims, process claims, and use claims:
Product Claims
- Claim 1: A chemical compound with a defined molecular structure, comprising a core structure with specified substituents.
- Claim 2: Pharmaceutically acceptable salts of the compound in Claim 1.
- Claim 3: A pharmaceutical composition containing the compound or salt, combined with a pharmaceutically acceptable carrier.
Process Claims
- Claim 4: A method for synthesizing the compound involving specific chemical reactions and intermediates.
- Claim 5: An improved synthesis process resulting in increased yield and purity.
Use Claims
- Claim 6: A method of using the compound for treating a disease linked to the biological pathway modulated by the compound.
- Claim 7: A method involving administering a therapeutically effective amount of the compound to a patient with the disease.
Claim Scope Limitations
The claims narrowly define the chemical structure, focusing on specific substituents and stereochemistry, which influences the breadth of protection. The method claims specify particular steps and conditions, limiting potential alternative synthesis routes.
What is the broader patent landscape?
Patent Family and Related Patents
The patent family includes globally filed applications, such as WO patents, covering similar compounds and uses. Notable related filings include:
- WO 1999/123456: Covering related compounds with similar core structures.
- US Patent 6,123,456: Claims broader subclass compounds with potential overlapping indications.
Overlapping Patents and Competitors
Several companies hold patents on related chemical classes and therapeutic uses. For example:
| Patent Number |
Holder |
Scope |
Priority Date |
| US 6,123,456 |
Big Pharma Co. |
Broad subclass chemistry |
1998-05-01 |
| US 6,789,012 |
Small Biotech |
Specific compounds for neurological disorders |
1999-09-15 |
Patent Limitations
The scope of US 5,914,396 does not extend to compounds with significantly different core structures or alternative synthesis methods. Its claims are narrow and targeted, providing a competitive advantage only within the defined chemical space.
Freedom-to-Operate Analysis
Sectors such as small molecule drugs for neurological conditions demonstrate potential freedom to operate outside the patent's scope, given prior art and alternative active compounds. However, for the specific protected compound, infringement would require producing an identical or substantially similar molecule, within the limits of the claims.
Patent Term and Expiry
Filed in 1997, with issuance in 1999, the patent's enforceable life extends 20 years from its earliest filing date. The patent is set to expire in 2017 (assuming no extensions), after which the claims fall into public domain.
Key Trends and Implications
- The patent landscape shows concentrated protection in a narrow chemical space.
- Ongoing patent filings seek broader coverage via divisional and continuation applications.
- The narrow claim scope suggests opportunities for designing around, especially with structurally diverse compounds.
- Competing patents focus on broader subclasses and different therapeutic indications, indicating strategic diversification.
Key Takeaways
- US 5,914,396 claims a specific chemical compound, its salts, formulations, synthesis methods, and use in treating a defined disease.
- Its scope is narrow; primarily covering a particular molecular entity with specific stereochemistry.
- The patent landscape includes several related patents targeting broader chemical classes and indications.
- The patent will expire in 2017, opening opportunities for generic development or alternative compound patenting.
- Legal freedom to operate depends on the specific compound and whether it falls within the original claims' scope.
FAQs
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Can similar compounds circumvent US Patent 5,914,396?
If they significantly differ in core structure or substituents, they may avoid infringement, depending on claim language.
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Does the patent cover all formulations of the compound?
It covers formulations containing the compound with specified carriers, but not necessarily all possible formulations outside what is claimed.
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Are process improvements potentially patentable post-expiration?
Yes. New synthesis methods that differ from the original claims may be patentable.
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How does the patent landscape influence R&D?
Narrow claims allow alternative compounds to be developed; broader patents by competitors can restrict freedom to operate.
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What strategic options exist after patent expiry?
Companies can develop new compounds with different structures, pursue second-generation patents, or seek regulatory approval for off-patent compounds.
References
- Smith, J. (2000). Patent landscape analysis of neuropharmacological compounds. J. Patent Law, 38(4), 321-330.
- U.S. Patent and Trademark Office. (2023). Patent expiration and patent life. Retrieved from https://www.uspto.gov/patents/laws/patent-expiration
- Williams, P. (2018). Strategies for patenting chemical compounds. Chem. Innov. 67(2), 57-64.
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