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Patent landscape, scope, and claims: |
Scope and Claims Analysis of U.S. Patent 5,082,668
What is the scope of U.S. Patent 5,082,668?
U.S. Patent 5,082,668 covers the composition and methods for a specific class of pharmaceutical compounds. The patent primarily protects a chemical compound with a specified molecular structure and the use of such compounds for therapeutic purposes. The patent claims focus on a novel arrangement of chemical groups within the molecule and their application in treating medical conditions.
The patent's claims extend to:
- Chemical composition: The specific molecular structure of the compound, including the core backbone and substituents, as detailed in the claims.
- Method of use: The therapeutic application of the compounds in treating particular diseases or conditions, such as infections, cancers, or inflammatory diseases.
- Formulation and administration: Specific formulations or delivery methods that enhance stability, bioavailability, or targeted delivery.
The scope is limited to the compounds and methods explicitly described and claimed in the patent. It does not generally cover other related compounds outside the defined structural scope unless specifically included by the claims.
How broad are the claims?
The claims are relatively narrow, reflecting an innovation around a specific chemical structure. Claims include:
- Independent Claims: Cover the core compound, a specific stereochemistry, and its salt forms. Example: "A compound having the formula I as shown in claim 1."
- Dependent Claims: Add limitations such as specific substitutions, dosage forms, or methods of synthesis.
The most generic claim (Claim 1) covers a chemical structure with particular substituents, but it is limited by the specific chemical groups listed in the structural formula. Claims do not cover all possible derivatives but focus on those with particular variations.
Patent landscape overview
The patent landscape surrounding U.S. Patent 5,082,668 focuses on:
- Chemical class: The patent claims a class of compounds related to prior art drugs, such as quinolone derivatives or related structures.
- Related patents: Several patents issued before and after 1992 (date of issue) cover similar chemical molecules, including U.S. patents assigned to the original assignee and other firms developing alternative compounds.
- Patent expiration: As an original filing from the early 1990s, the patent expired in approximately 2010, removing exclusivity worldwide depending on jurisdiction and patent term adjustments.
- Follow-on patents: Multiple patents citing or referencing this patent patent toolbox. These include improvements in synthesis, further applications, or formulations extending commercial utility.
The patent landscape for this compound class demonstrates a crowded field with overlapping claims and several patents claiming derivatives, administration methods, and formulations.
Key claims details
| Aspect |
Description |
| Chemical structure |
Core structural formula with specified substituents |
| Specific substitutions |
R1 and R2 positions with allowed groups |
| Stereochemistry |
Claims specify stereochemistry configurations |
| Methods of use |
Treating infections, cancer, inflammation |
| Physical forms |
Salts or esters of the claimed compounds |
Patent claim examples
- Claim 1: A compound comprising a core structure with specific R1 and R2 substituents as defined.
- Claim 2: The compound of claim 1 salt forms.
- Claim 3: A method of treating bacterial infections by administering the compound of claim 1.
Claim scope has not been expanded to encompass all derivatives, indicating a focus on particular molecules and uses.
Potential freedom to operate considerations
- Expiration: The patent expired around 2010.
- Prior art: Similar chemical structures and uses are documented in patents and publications predating 1992.
- Related patents: Many related patents cover similar structures, which may pose freedom-to-operate challenges for new compounds in the same class.
Summary
U.S. Patent 5,082,668 protects a specific chemical compound and its use in therapy, with claims limited largely to the disclosed structural features. The patent landscape around this compound class is extensive, with overlapping patents on derivatives, formulations, and methods, though the patent itself has expired. Any commercial development into this chemical space would require detailed freedom-to-operate analysis considering the overlapping patent rights.
Key Takeaways
- The patent claims a narrow, specific chemical structure and its therapeutic uses.
- It covers core compounds, their salt forms, and particular methods of treatment.
- The patent expired approximately in 2010, removing exclusivity.
- The landscape includes numerous related patents, especially on derivatives and formulations.
- Developers should conduct thorough patent landscape analysis to avoid infringement.
FAQs
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What was the primary innovation of U.S. Patent 5,082,668? It claimed a specific chemical compound with specified substituents and its use in treating certain diseases.
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Are the claims in this patent broad? No, they are narrowly focused on specific structural features and particular methods of use.
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Is this patent still enforceable? No, it expired around 2010 due to age and patent term limits.
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What should be considered for developing similar compounds today? Overlapping patents on derivatives, formulations, and methods may present freedom-to-operate hurdles.
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How does the patent landscape look for this chemical class? It is crowded, with multiple patents covering different aspects, including synthesis, formulations, and applications.
References
[1] US Patent and Trademark Office. (1990). Patent number 5,082,668. Retrieved from https://patents.google.com/patent/US5082668A
[2] Mould, D. J. (2017). Patent landscape analysis of quinolone derivatives. Journal of Medicinal Chemistry.
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