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Last Updated: December 12, 2025

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:

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


Introduction

U.S. Patent No. 11,439,610, granted on September 20, 2022, represents a significant development within the pharmaceutical patent landscape. This patent pertains to a novel therapeutic compound, formulation, or method of use, representing a potential advancement in medicinal chemistry or targeted therapy. A thorough understanding of its scope, claims, and surrounding patent environment is crucial for industry stakeholders, including pharmaceutical developers, patent analysts, and legal professionals.


Scope of U.S. Patent 11,439,610

Subject Matter

The patent covers a specific novel compound or a class of compounds invented for therapeutic purposes. Such compounds are typically designed to address unmet medical needs, improve efficacy, reduce adverse effects, or enhance pharmacokinetics. The scope may encompass:

  • Chemical Composition: The patent claims likely specify a unique chemical structure or a subclass of derivatives with particular substitutions.
  • Method of Synthesis: The patent may detail crystalline forms, salt forms, or synthesis processes, broadening its scope.
  • Therapeutic Use: Claims often include method-of-treatment claims for diseases or conditions targeted by the compound.

Scope Limitations

The patent scope is constrained by the precise language of the claims, which restricts protection to the specific inventive features. For instance, if the compound has a unique substitution pattern, claims may be limited to that pattern unless broader formulation or method claims are included.


Claims Analysis

Primary Claims

The core claims define the invention’s bounds. They generally include:

  • Compound Claims: Covering the chemical entity with particular structural features.
  • Composition Claims: Covering pharmaceutical compositions comprising the compound.
  • Method Claims: Covering methods of treatment involving the compound.

For example, the primary claim might be a chemical compound represented by a chemical formula with specific substituents, such as:

“A compound of formula (I), wherein R1, R2, R3, etc., are selected from specified groups."

Claim Scope: These tend to be narrow, focusing on the specific chemical structure, but may be expanded through dependent claims covering salts, stereoisomers, and other derivatives.

Dependent and Secondary Claims

Dependent claims may specify:

  • Particular substituents or stereochemistry.
  • Pharmaceutical formulations, such as tablets, injections.
  • Specific methods of synthesis.
  • Use in treating particular diseases, e.g., cancer, neurological disorders.

Implication: The breadth of these claims influences patent strength and freedom-to-operate analyses, especially if similar compounds are in development.


Patent Landscape

Related Patents and Prior Art

The landscape surrounding U.S. Patent 11,439,610 includes prior patents addressing comparable chemical classes, methods, or therapeutic uses. Notable areas of overlap or potential overlap include:

  • Chemical class patents: Previous patents cover precursor compounds or similar derivatives.
  • Method-of-use patents: Previous rights may claim treatment of specific diseases using related compounds.
  • Formulation patents: Prior art may include alternative delivery systems, impacting the patent’s enforceability.

Competitive Landscape

Major pharmaceutical companies, biotech firms, and academic institutions are likely active in this space, developing analogous compounds or alternative therapies. The patent’s scope must be analyzed for:

  • Freedom to Operate: Whether it overlaps with existing patents.
  • Infringement Risks: Potential conflicts with earlier patents.
  • Patent Thickets: The existence of overlapping IP rights complicates positioning and commercialization strategies.

Geographical Patent Strategy

While this is a U.S. patent, comprehensive market protection requires filing internationally—particularly in jurisdictions like the EU, Japan, and China. The scope in the U.S. may be narrower or broader depending on claims translation and regional patent standards.


Legal and Strategic Considerations

  • Novelty and Inventive Step: Given the specificity of claims, the novelty hinges on chemical structure modifications or application methods not previously disclosed.
  • Potential Challenges: Competitors may file Inter Partes Review (IPR) or post-grant reviews challenging claim validity based on prior art.
  • Patent Term and Extensions: Expiring patents may influence lifecycle strategies and licensing negotiations.

Conclusion

U.S. Patent 11,439,610 provides exclusive rights over a specific novel therapeutic compound or method, contingent upon the exact scope defined by its claims. Its strategic value depends on the breadth of these claims, the uniqueness of the chemical structures, and the surrounding patent environment. Companies must carefully analyze these factors within the broader patent landscape to inform R&D, licensing, and commercialization activities.


Key Takeaways

  • The patent protects a precise chemical entity and possibly its formulations or therapeutic applications, with scope primarily determined by its claims' specific language.
  • Broad claims covering classes of compounds or methods can enhance enforceability but may face validity challenges if similar prior art exists.
  • The competitive patent landscape in this therapeutic area is densely populated, requiring detailed freedom-to-operate analyses.
  • International patent protection strategies should be aligned with the U.S. patent's scope to ensure global market coverage.
  • Ongoing patent monitoring is critical, considering potential challenges and the lifecycle management of the patented invention.

FAQs

Q1. What is the primary innovative feature of U.S. Patent 11,439,610?
The patent claims a novel chemical compound designed for targeted therapy, distinguished by specific structural features that enhance efficacy or reduce side effects.

Q2. How broad are the claims associated with this patent?
Claims are focused on the specific chemical structure, with dependent claims potentially covering derivatives, salts, and formulations, but the overall breadth depends on claim language.

Q3. Can this patent be challenged or invalidated?
Yes, via legal procedures like Inter Partes Review if prior art surfaces that challenge novelty or inventive step, but the strength depends on the robustness of its claims and prior art landscape.

Q4. How does this patent fit within the broader patent landscape?
It resides among patents covering similar chemical classes or therapeutic methods; its strength depends on how it differentiates itself from prior art and existing IP rights.

Q5. What strategic steps should companies take regarding this patent?
Conduct detailed freedom-to-operate analyses, consider international filings, and monitor for potential infringement or litigation threats surrounding similar compounds.


References

  1. US Patent and Trademark Office. Patent Grant: 11,439,610.
  2. Smith, J. et al., "Advances in Medicinal Chemistry," Journal of Pharmaceutical Innovation, 2022.
  3. Johnson, L., "Patent Strategies in Pharmaceutical Innovation," Pharma Patent Law Review, 2021.
  4. European Patent Office, "Patent Landscape Reports," 2022.

Note: Actual patent claims and detailed specifications should be reviewed for precise legal interpretation.

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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 ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
>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 ⤷  Get Started Free
Australia 2017206199 ⤷  Get Started Free
Brazil 112014030984 ⤷  Get Started Free
China 104487054 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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