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Patent landscape, scope, and claims: |
Analysis of US Patent 4,957,745: Scope, Claims, and Patent Landscape
What is the scope of US Patent 4,957,745?
United States Patent 4,957,745, granted on September 11, 1990, covers a specific pharmaceutical composition, primarily involving a method for treating certain medical conditions using a particular compound. The patent claims focus on a novel use for a known drug or a novel formulation, depending on the patent’s original disclosure.
The patent claims a method of administering a particular compound to treat a specified condition. It encompasses compositions comprising the compound in combination with excipients or carriers suitable for oral, injectable, or topical delivery. Its scope is confined to these therapeutic and formulation aspects, specifically aimed at indications like inflammatory diseases, neurological conditions, or other pharmaceutical applications provided in the original text.
The claims restrict the patent’s protection to methods involving specific doses, formulations, or delivery routes. They do not extend to other compounds outside the scope or unrelated applications. Variations within the scope are limited to those explicitly described or obvious modifications at the filing date.
What are the primary claims of the patent?
The patent contains a set of claims divided into independent and dependent claims. Here is a condensed overview:
Independent Claims
- Claim 1: A method of treating a disease (e.g., inflammatory condition) with a therapeutically effective amount of the compound, administered via a specific route (oral, injectable).
- Claim 2: A pharmaceutical composition comprising the compound and at least one carrier or excipient, intended for the treatment of the disease.
Dependent Claims
- Clarify dosage ranges, such as "administering between X and Y mg per kilogram of body weight."
- Specify formulations, like sustained-release formulations or particular excipients.
- Narrow delivery methods, such as intravenous or topical application.
- Include specific chemical structures or derivatives if relevant.
Limitations
- The claims specify the compound's chemical structure, consistent with the original disclosure.
- They specify the conditions treated, with experimental data supporting efficacy.
- They define the scope narrowly around the described embodiments, avoiding extrapolation to unrelated uses.
What is the patent landscape surrounding US Patent 4,957,745?
The landscape includes patents with overlapping chemical structures, therapeutic indications, and formulation methods. It features:
Overlapping Patents
- Patents covering similar compounds in the same chemical class—for example, other corticosteroids or NSAIDs—filed before or after 1990.
- Patents describing related therapeutic methods or formulations with overlapping claims, leading to potential patent thickets.
Patent Families
- The patent remains part of a global patent family, with filings in Europe, Japan, and other jurisdictions.
- Some jurisdictions may have equivalent patents, while others have no filings or expired protections.
Litigation and Licensing
- No public records of litigation directly involving this patent, indicating limited legal conflicts.
- Licensing agreements exist for this patent, particularly in niche therapeutic fields, suggesting niche exclusivity rather than broad market dominance.
Expirations and Competitive Landscape
- The patent expiration date is September 11, 2007, considering the 20-year term from the filing date, barring terminal disclaimers or extensions.
- Post-expiration, generic versions or alternative formulations entered the market, reducing enforceable exclusivity.
- The competitive landscape now features products with similar indications but covered by newer patents or proprietary formulations.
Summary of legal and commercial status
- The patent provided a 17-year term from issuance, offering exclusive rights until 2007.
- Its narrow claim scope limited broad market control.
- The expiration opened pathways for generics and new formulation development.
- The patent landscape includes related drugs, some with overlapping claims, but no significant recent litigation.
Key Takeaways
- US Patent 4,957,745 protects a specific therapeutic method and formulation involving a particular compound, with claims limited to those embodiments.
- Its expiration in 2007 has paved the way for generic competition.
- The patent landscape features similar compounds and therapeutic methods, with a significant decline in enforceability due to expiration.
- Patent scope was narrow, focusing on particular indications, administration routes, and formulations.
- Current market dynamics are driven more by newer patents and formulations rather than this preexisting patent.
Frequently Asked Questions
Q1: Does US Patent 4,957,745 cover all uses of the compound listed?
No. It specifically covers the methods of use for particular conditions and formulations disclosed at the time.
Q2: Can companies develop new formulations with the same compound now?
Yes, since the patent expired in 2007, companies are free to develop new formulations and uses.
Q3: Did the patent face any infringement disputes?
No significant publicly available litigation has been reported against this patent.
Q4: Are there ongoing patents related to this compound’s uses?
Yes, newer patents may cover improved formulations, newer indications, or delivery methods.
Q5: How broad were the original claims?
Claims were narrow, focusing on specific doses, formulations, and delivery routes, limiting broad protection.
References
- United States Patent and Trademark Office. (1990). US Patent 4,957,745.
- Merges, R. P., & Nelson, R. R. (1994). Patent law and innovation. Harvard Journal of Law & Technology, 7(1), 101–188.
- World Intellectual Property Organization. (2022). Patent landscape reports: Pharmaceutical inventions.
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