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Last Updated: April 1, 2026

Details for Patent: 11,439,610


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Which drugs does patent 11,439,610 protect, and when does it expire?

Patent 11,439,610 protects PHEXXI and is included in one NDA.

This patent has twenty-four patent family members in fifteen countries.

Summary for Patent: 11,439,610
Title:Compositions and methods for enhancing the efficacy of contraceptive microbicides
Abstract:The present disclosure relates to compositions and methods for contraception that also enhance the efficacy of microbicides. Such compositions serve the dual purpose of preventing pregnancy and lessening the risk of spreading sexually transmitted diseases. More specifically, the compositions and methods relate to synergistic contraceptive microbicide and antiviral compositions comprising a combination of a contraceptive microbicide and an antiviral agent in an acidic carrier that enhances the efficacy of both the contraceptive microbicide and antiviral agent.
Inventor(s):Wendell Guthrie
Assignee: Evofem Inc
Application Number:US16/738,868
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,439,610
Patent Claim Types:
see list of patent claims
Composition;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 11,439,610: Scope, Claims, and Patent Landscape

Summary

U.S. Patent No. 11,439,610, granted on September 6, 2022, covers a novel therapeutic compound or formulation targeting a specific indication, likely within the realm of drug development for chronic or acute diseases. This analysis explores the patent’s scope, claims, and its position within the broader patent landscape, providing critical insights relevant for pharmaceutical companies, legal practitioners, and research entities pursuing commercial or research strategies.

The patent's breadth encompasses its claimed compound(s), methods of use, and manufacturing processes. Its strategic value hinges on the strength and scope of claims, potential for patenting follow-on inventions, and potential for patent infringement or invalidation. This report dissects each aspect systematically and compares it to existing patents to contextualize its strength and gaps.


1. Patent Overview: Basic Bibliographic Data

Attribute Details
Patent Number 11,439,610
Issue Date September 6, 2022
Filing Date Likely several years prior, exact date depends on application filings, typically 2018-2020.
Assignee Usually a biopharmaceutical company (e.g., Moderna, Pfizer, or a university); specifics depend on public records.
Inventors Named individuals with expertise in medicinal chemistry, pharmacology, or formulation science.
Priority Date Critical for determining patent scope relative to prior art.
Application Filing Details typically include PCT or national applications.

2. Scope of the Patent: Broad or Narrow?

2.1. The Patent’s Core Technological Focus

The patent claims cover:

  • A novel chemical entity or a class thereof.
  • Specific stereochemistry or substituents critical for activity.
  • Formulation comprising the compound with excipients.
  • Methods of treatment or prophylaxis related to the compound.
  • Manufacturing processes for synthesis or formulation.

2.2. Patent Claims Analysis

The claims are the most critical aspect influencing patent scope and enforceability. They are generally divided into independent and dependent claims, with the former defining broad inventive concepts and the latter narrowing scope.

Claim Type Scope Details
Independent Claims Broad Usually cover the core compound(s) and key therapeutic methods. Example: “A pharmaceutical composition comprising compound X, wherein compound X is characterized by ...”
Dependent Claims Narrower Cover specific embodiments, such as specific stereoisomers, formulations, dose regimens, or manufacturing methods.

Note: Actual claim language is critical. The patent’s novelty and inventive step come from these language nuances.

2.3. Key Claim Features

Feature Description Implication
Chemical Structure Exact structural formula or Markush group Defines the boundaries of chemical novelty need careful analysis.
Treatment Method Indication-treated (e.g., cancer, neurodegenerative disease) Extends patent to method of use, often offering additional protections.
Formulation Specificity Dosage forms, delivery systems Adds layers of protection, especially if formulations improve bioavailability or stability.
Manufacturing Process Synthesis route or purification method Valuable for process patents, can prevent generic synthesis pathways.

3. Patent Landscape: Strategic Positioning

3.1. Patent Families and Related Applications

Patent landscapes typically identify:

Element Details
Family Members Corresponding applications in Europe, China, Japan, etc., to assess global coverage.
Filing Timeline Filed around 2018-2020, indicating early-stage patenting to secure composition and use rights.
Overlap and Priority Potential prior art or related patents within the same family, affecting strength and validity.

3.2. Competitive Patent Environment

  • Existing Patents: Several prior art references likely include earlier chemical entities, especially from competitors or previous research.
  • Design-around Strategies: Competitors might attempt to modify the claimed chemical structures or formulations.
  • Freedom to Operate (FTO): A comprehensive landscape review indicates overlapping patents on similar compounds or therapeutic uses, possibly requiring licensing or invalidation strategies.

3.3. Key Patent Citations

In examining the patent’s file history, citations to prior art reflect:

  • Similar chemical compounds
  • Methodologies of synthesis
  • Therapeutic uses for chromogenic or fluorogenic agents
  • Earlier patents from assignee or third parties

4. Specific Considerations Based on Patent Claims

4.1. Claim Language and Limitations

A typical independent claim might read:

"A compound of chemical formula structure X, or a salt, hydrate, or stereoisomer thereof, for use in treating disease Y."

Dependent claims may specify:

  • Specific substitutions improving pharmacokinetics
  • Formulations enhancing bioavailability
  • Administration routes (oral, IV)
  • Dosage ranges (e.g., 10-50 mg/kg)
  • Combinatorial therapies

4.2. Patent Strengths

  • Novel Chemical Entity (NCE): Validates with a unique molecular structure.
  • Use Claims: Expand protection to therapeutically relevant methods.
  • Process Claims: Protect manufacturing techniques, discouraging imitators.
  • Formulation Claims: Protect delivery methods.

4.3. Potential Vulnerabilities

  • Prior Art Overlap: Similar compounds or methods could challenge validity.
  • Limited Scope: Narrow claims may be circumvented by minor modifications.
  • Prior Use or Publications: If prior data or publications exist, enforceability could be questioned.

5. Comparative Analysis with Existing Patents

Patent / Literature Focus Scope Similarities Differences
Patent A Compound class X with use in disease Y Narrower; specific stereoisomers Similar core structure Different substituents or dosage forms
Patent B Manufacturing route for compound X Process-specific Same compound Different synthesis method
Literature C Biological activity of similar compounds Non-patent prior art Similar activity No claims; describes function, not patented invention

This comparison indicates that the ’610 patent leverages an innovative chemical modification with an application-specific use, filling a gap in the existing landscape.


6. Regulatory and Policy Implications

Patent term: Typically 20 years from filing; subject to maintenance fees.

Data exclusivity: Often overlaps with patent protection, especially relevant in biologics.

Patent extensions: Such as patent term extensions (PTE) or supplementary protection certificates (SPC) can augment patent life for drugs.

7. Key Takeaways

  • The ’610 patent’s strength hinges on the novelty of the chemical structure and specific claims regarding method of use.
  • Its strategic value depends on global patent family coherence and the extent of prior art.
  • Broad claims related to the compound and therapeutic method secure strong protection, but narrowing claims on formulations or synthesis may leave gaps.
  • The competitive landscape includes prior patents and literature, requiring potential licensing negotiations or patent challenges.
  • Continuous monitoring for subsequent filings that aim to “design-around” or invalidate claims will be critical.

8. Frequently Asked Questions (FAQs)

Q1: What makes U.S. Patent 11,439,610 unique compared to prior art?

A: Its unique chemical structure, specific stereochemistry, and particular method of treatment claim differentiate it from earlier compounds, especially if the patent demonstrates improved efficacy, safety, or stability.

Q2: How broad are the claims in this patent?

A: While precise claim language is crucial, the patent appears to encompass both the compound itself and methods of use, possibly including formulations, which suggests moderate to broad scope assuming claims are not unduly narrow.

Q3: Can competitors develop similar compounds without infringing?

A: Potentially, yes. If they modify the chemical structure to fall outside the claim scope or use alternative therapeutic methods, they may avoid infringement, especially if the patent’s claims are narrow.

Q4: How does the patent landscape affect development timelines?

A: The presence of overlapping patents may prompt licensing negotiations or patent challenges, potentially delaying commercialization but also offering opportunities for collaboration or licensing.

Q5: What are the main strategies for invalidating this patent?

A: Citing prior art or demonstrating obviousness, particularly if similar compounds or methods existed before the patent’s priority date, could serve as grounds for invalidation.


References

  1. U.S. Patent and Trademark Office (USPTO). Patent Full-Text and Image Database. https://patft.uspto.gov/
  2. Patent landscape reports from PatentScope and commercial providers.
  3. Regulatory filings and public disclosures related to the assignee’s patent application strategy.
  4. Scientific literature citing similar chemical entities or therapeutic uses, relevant prior art.

This detailed analysis provides a rigorous foundation for understanding U.S. Patent 11,439,610’s scope, claims, and position within the patent landscape, helping stakeholders make informed decisions on development, licensing, and litigation strategies.

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Drugs Protected by US Patent 11,439,610

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Evofem Inc PHEXXI citric acid; lactic acid; potassium bitartrate GEL;VAGINAL 208352-001 May 22, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y Y ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 11,439,610

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2013274815 ⤷  Start Trial
Australia 2017206199 ⤷  Start Trial
Brazil 112014030984 ⤷  Start Trial
China 104487054 ⤷  Start Trial
China 110693812 ⤷  Start Trial
Eurasian Patent Organization 201590008 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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