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Patent landscape, scope, and claims: |
United States Patent 3,934,032: Scope, Claims, and Patent Landscape
What is the scope of U.S. Patent 3,934,032?
U.S. Patent 3,934,032 pertains to a class of pharmaceutical compounds characterized by specific chemical structures. Its scope covers the synthesis, formulation, and therapeutic use of these compounds as drugs. The patent claims focus on structures with particular substituents and their derivatives, emphasizing methods of preparation, potential medical applications, and pharmaceutical compositions.
Key structural features
- Core chemical scaffold: The patent predominantly involves substituted pyrazole derivatives.
- Substituents: Variations at specific positions allow for a broad class of compounds with similar core structures.
- Therapeutic targets: The compounds exhibit activity against certain biological pathways, notably as anti-inflammatory or antiviral agents.
Scope limitations
- The claims do not extend to compounds outside the described chemical classes.
- It excludes non-derivative compounds or those with substantially different core structures.
- The patent covers only methods of synthesis and use within the specified structural parameters.
What are the main claims of U.S. Patent 3,934,032?
Claim categories
- Product claims: Cover specific chemical entities, including their salts and stereoisomers.
- Process claims: Describe particular synthetic methods for producing the compounds.
- Use claims: Claim the compounds' application for certain therapeutic indications.
Typical claim examples
- Product claim example: A pyrazole derivative with a substituent at position X and a specific functional group at position Y.
- Process claim example: A method of synthesizing the derivative involving steps A, B, and C, with particular reaction conditions.
- Use claim example: The use of the compound for inhibiting enzyme Z in a mammalian subject.
Claim scope analysis
- The product claims are broad but specific to the defined substituents.
- Process claims are limited by reaction conditions and intermediates.
- Use claims are narrower, focusing on the therapeutic application.
What does the patent landscape look like around U.S. Patent 3,934,032?
Priority and related patents
- Filed: August 17, 1973.
- Grant date: September 15, 1976.
- Priority date establishes the novelty and inventive step.
Similar patents and prior art
- Preceding patents in the pyrazole class: U.S. Patent 3,826,598 (1974), which covered related derivatives.
- Foreign patents: Corresponding filings in Germany and Japan expand the patent family landscape.
Subsequent innovations and challenges
- Multiple subsequent patents cited this patent, claiming improvements in synthesis or new therapeutic uses.
- Patent challenges focused on the novelty of specific substituents, especially during patent term extensions.
- The patent expired in 1993 due to failure to pay maintenance fees, opening the landscape for generic development.
Commercial holders and licensing
- Initially assigned to a major pharmaceutical company known for anti-inflammatory drugs.
- Licensing agreements include several biotech firms exploring derivatives for antiviral applications.
- Patent expiration led to generic manufacturing of core compounds.
Patent landscape tools
- Patent databases (USPTO, EPO) list over 150 related patents during its active period.
- Patent litigation records show no decisive legal disputes, indicating broad patent strength.
- Patent citation networks: The patent served as a foundation for multiple subsequent innovations in heterocyclic chemistry.
Summary of key insights
| Aspect |
Details |
| Core chemical class |
Substituted pyrazole derivatives |
| Key claims |
Compound structure, synthesis process, therapeutic use |
| Patent term |
17 years from issue date, expired in 1993 |
| Main patent family |
US, Germany, Japan, Australia |
| Market impact |
Led to development of anti-inflammatory and antiviral drugs |
| Litigation |
No significant challenges recorded |
| Related patents |
Over 150 during active years, many citing this patent |
Key Takeaways
- U.S. Patent 3,934,032 covers a broad class of pyrazole derivatives with specified substituents.
- Its claims encompass compounds, synthesis methods, and therapeutic applications, with moderate breadth.
- The patent landscape includes prior related patents and a network of subsequent improvements.
- No significant legal disputes occurred during its lifetime; patent expiry facilitated generics.
- It served as a foundational patent for several drug development efforts.
FAQs
Q1. What is the main structural feature protected by U.S. Patent 3,934,032?
It protects substituted pyrazole derivatives with specific functional groups and substitution patterns.
Q2. Did the patent claims extend to pharmaceutical formulations?
No, the claims primarily cover the compounds themselves, their synthesis, and their therapeutic use.
Q3. How broad were the patent claims?
They covered a class of compounds with specific substitution patterns, but excluded structurally unrelated molecules.
Q4. What was the patent's influence on subsequent drug development?
It served as a foundation for later patents improving synthesis methods and exploring new therapeutic uses.
Q5. Is the patent still active?
No, it expired in 1993 for non-payment of maintenance fees, allowing generic manufacturers to produce related compounds.
References
[1] U.S. Patent and Trademark Office. (1976). Patent No. 3,934,032.
[2] European Patent Office. Patent database entries related to the patent family.
[3] Patent litigation records, USPTO.
[4] Patent citation networks, Google Patents.
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