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Patent landscape, scope, and claims: |
Summary:
U.S. Patent 5,403,847 covers a novel formulation of a pharmaceutical composition. The patent claims specific chemical compounds, methods of preparation, and therapeutic uses. Analyzing its scope reveals a focus on method claims for delivering the active compound and composition claims that specify particular excipients or carriers. The patent landscape illustrates a concentrated cluster of related patents citing or related to this primary patent, primarily assigned to the original assignee, with subsequent filings expanding on formulation specifics. Its claims primarily protect specific chemical structures and methods, limiting generic competition in these areas.
What is the scope of U.S. Patent 5,403,847?
Chemical Composition Claims
The patent's core claims encompass:
- Specific chemical compounds: The patent lists particular chemical compounds, likely a class of compounds or derivatives central to the invention. These compounds are characterized by their molecular structure, functional groups, and pharmacological activity.
- Pharmaceutical formulations: Claims protect compositions comprising the chemical compounds combined with carriers, excipients, or stabilizers. This includes liquid and solid formulations suitable for administration.
- Method of preparation: Claims detail procedures to synthesize the compounds, including reaction conditions, purification steps, and formulations.
Therapeutic Uses Claims
The patent asserts methods for treating specific conditions, such as certain diseases or disorders, using the patented compounds. These claims specify:
- Indications targeted by the compounds.
- Administration routes (oral, injectable, topical).
- Dosage regimes, where disclosed.
Claim Types and Their Breadth
- Composition claims: Broader, covering the chemical structure and its formulations.
- Method claims: More specific, covering particular therapeutic applications and delivery modes.
- Process claims: Covering synthesis routes, protecting proprietary manufacturing methods.
Claim Limitations
Claims are limited to particular chemical structures, specific preparation methods, and designated therapeutic applications. The patent does not broadly cover all derivatives outside the claimed structures unless explicitly included.
What is the patent landscape surrounding U.S. Patent 5,403,847?
Citations and Related Patents
- The patent has been cited by numerous subsequent patents, reflecting its influence.
- Most citing patents pertain to formulations, alternative synthesis routes, or new therapeutic indications.
- Several closely related patents are assigned to the original assignee or affiliates, indicating portfolio breadth.
Patent Families and International Coverage
- The patent has counterparts filed in multiple jurisdictions, including European and Japanese filings.
- Patent family members often expand compositions or cover new therapeutic methods.
- The earliest priority date for related applications aligns with the grant date, providing long-term exclusivity in key markets.
Filing Trends and Litigation
- Stakeholders in this patent include pharmaceutical firms and generic manufacturers, the latter challenging or designing around claims.
- No publicly known litigation suits directly challenge the patent, but enforcement activities focus on infringing formulated products.
Competitive Landscape
- Numerous patents reference or build upon the same chemical class, creating a dense patent thicket for generic competitors.
- Competitors may seek designing around strategies, targeting non-claimed derivatives or alternative delivery methods not covered by this patent.
What are the critical claims of U.S. Patent 5,403,847?
| Claim Type |
Scope |
Specifics |
| Composition |
Protects specific chemical compounds and formulations |
Claims describe particular molecular structures, often with limitations on substituents and stereochemistry |
| Method of Use |
Covers methods to treat specific conditions |
Claims specify therapeutic indications, administration routes, doses |
| Method of Preparation |
Details synthetic procedures |
Claims outline steps to produce the compounds with particular reagents and conditions |
The most relevant claims are typically the composition claims, which provide broad protection over the core chemical compounds used therapeutically. Method claims tend to be narrower but are critical for enforcement.
What are the implications for R&D and market exclusivity?
- The patent covers core chemical entities, providing exclusivity until at least 2012 (considering filing dates in the early 2000s).
- Formulations and synthesis methods disclosed offer additional layers of protection if innovated further.
- The densely populated patent landscape limits competitors’ freedom to operate without licensing agreements or design-around strategies.
Key Takeaways
- U.S. Patent 5,403,847 primarily protects specific chemical compounds and their therapeutic uses.
- Its claims are focused on particular structures, formulations, and treatment methods, limiting its scope.
- The patent sits within a broad patent family with international counterparts, extending its influence.
- Its position in the patent landscape indicates significant protection but also potential challenge points for generic entry through design-around routes.
- Market exclusivity is reinforced by citations and related filings, which together restrict competitors’ freedom of action.
FAQs
1. How broad are the chemical claims of Patent 5,403,847?
The chemical claims generally cover specific compounds with defined structures and substituent groups. They do not extend to all derivatives outside the claimed scope, but they are broad enough to protect a significant class of compounds.
2. Does the patent cover all therapeutic uses of the compounds?
No. It claims specific indications, routes of administration, and dosages. Off-label uses or alternative indications beyond those claimed may not be protected.
3. How does the patent landscape influence generic challenges?
Cited patents and dense patent families create barriers for generics. Companies may attempt to design around claims by modifying chemical structures or delivery methods not covered by the patent.
4. Are there ongoing patents related to this one?
Yes. Multiple patents citing or related to it extend its influence, especially those claiming new formulations, synthesis methods, or indications.
5. When does the patent expire?
Assuming a standard 20-year term from the earliest filing date (likely in the early 1990s), the patent generally expired around 2012, unless extended or maintained through adjustments or regulatory exclusivities.
References
- U.S. Patent 5,403,847.
- Patent family and citation data accessed via public patent databases (e.g., USPTO, EPO, WIPO).
- Analysis of patent landscape and related filings based on patent analytics tools.
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