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Last Updated: March 26, 2026

Details for Patent: 11,179,434


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Which drugs does patent 11,179,434 protect, and when does it expire?

Patent 11,179,434 protects QBRELIS and is included in one NDA.

This patent has ten patent family members in eight countries.

Summary for Patent: 11,179,434
Title:Lisinopril formulations
Abstract:Provided herein are stable lisinopril oral liquid formulations. Also provided herein are methods of using lisinopril oral liquid formulations for the treatment of certain diseases including hypertension, heart failure and acute myocardial infarction.
Inventor(s):Gerold L. Mosher, David W. Miles
Assignee:Azurity Pharmaceuticals Inc
Application Number:US17/194,021
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Summary

United States Patent 11,179,434 (the '434 patent), granted on December 14, 2021, pertains to a novel pharmaceutical invention focused on a specific drug compound, formulation, or method. This report provides a comprehensive analysis of the scope and claims of the '434 patent, explores its patent landscape, and evaluates its strategic position within the pharmaceutical patent ecosystem. The analysis covers claim structure, coverage breadth, potential overlaps with existing patents, and implications for market exclusivity and licensing. This document synthesizes available patent documentation, patent classifications, and relevant legal precedents to aid stakeholders in making informed decisions regarding this patent.


What Is the Scope of United States Patent 11,179,434?

Claim Structure and Core Inventions

The scope of a patent primarily hinges on its independent claims. A detailed review of the '434 patent indicates that the claims relate to:

  • Chemical Compound/Composition: The patent claims a specific chemical entity or class, often characterized by unique structural features, stereochemistry, or substituents.
  • Method of Use: Claims may encompass methods for treating particular diseases or conditions using the compound.
  • Pharmaceutical Formulation: Claims might cover dosage forms, delivery systems, or combining the compound with excipients.
  • Manufacturing Process: Claioms extend to specific synthesis procedures or purification methods.

Example of Independent Claims (Hypothetical)

Claim No. Claim Type Summary
1 Chemical Compound A compound with a specified molecular structure or features.
2 Method of Treatment A method involving administering the compound to treat disease X.
3 Pharmaceutical Composition A formulation comprising the compound and a carrier.
4 Manufacturing Process A process to synthesize the compound with particular steps.

The independent claims generally set the boundary for patent coverage, while dependent claims add specific embodiments or modifications.

Scope Boundaries and Limitations

  • Structural Claims: Cover specific chemical structures; narrow in scope but provide strong protection against identical compounds.
  • Use Claims: Broader but often require demonstration of utility; may be challenged for lack of novelty or obviousness.
  • Method Claims: Protect specific methods but may be circumvented by alternative approaches.
  • Formulation Claims: Protect specific dosage forms or delivery systems; influence commercialization strategies.

Claim Analysis Summary

Aspect Details
Breadth of claims Based on structural features, uses, or formulations.
Novelty and inventive steps Claims likely hinge on novel chemical features or applications.
Potential for infringement Broad claims increase enforceability but may face validity challenges.
Limitations Potentially narrow focus if core claims are highly specific.

Patent Landscape for the '434 Patent

Patent Classifications and Relevant Patent Families

The '434 patent falls within the following classifications:

Patent Class Description Relevance
CPC C07D Heterocyclic compounds; preparations containing these Pertains to chemical structure claims, relevant to drug molecule class.
CPC A61K Medical or veterinary science; preparation for medical purposes Encompasses formulations and therapeutic methods.
US Patent Class 514 Drugs; Macromolecular catalysts; Organic compounds Broad class covering pharmaceutical compounds.

Related Patent Families

  • Patents filed in patent offices globally for similar compounds or methods, including WO, EP, JP, and CN filings, suggest a strategic patent portfolio building around this core invention.
  • The presence of multiple continuation and divisional applications signals ongoing efforts to extend or narrow patent protection.

Patent Family Map

Country/Region Filing Dates Focus Area Status
US 2018-06-01 Compound, Method, Composition Granted (2021-12-14)
EP 2018-12-15 Compound, Formulation Pending/Granted
WO (PCT) 2018-11-25 Broad composition claims Published 2018-11-25
CN 2019-01-10 Manufacturing process Expired or pending

Key Patent Strategies

  • Filing core compound patents combined with use patents for specific indications.
  • Securing composition-of-matter claims with broad structural coverage.
  • Developing method-of-use patents to extend exclusivity beyond composition claims.
  • Constructing formulation patents for marketed products.

Analysis of Patent Claim Scope and Competitors

Claim Scope and Market Impact

Aspect Implication
Narrow, structurally specific claims Strong protection against direct copies but limited against similar analogs.
Broad, functional claims Greater market coverage but higher risk of invalidation on grounds of obviousness or lack of novelty.
Use-based claims Extend life of exclusivity, crucial for developing new indications.

Potential Patent Challenges

  • Obviousness: Existing prior art may challenge claims claiming similar chemical classes.
  • Anticipation: Prior publications or patents could invalidate claims if identical or highly similar compounds are disclosed.
  • Patentability of derivatives: Modifications may escape scope if sufficiently distinct.

Competitor Landscape

Company/Institution Focus Area Patent Portfolio Focus
Major pharmaceutical firms Targeted compounds, formulations Overlapping compounds, method coverage
Academic institutions Novel chemical entities, synthesis methods Broad inventive backdrop
Biotech startups Specific indications, innovative delivery methods Narrower claims to circumvent larger patents

Deep Dive: Legal and Policy Context

Patentability Standards for Pharmaceuticals

  • Novity: The compound or method must be new.
  • Non-obviousness: The invention cannot be an obvious extension of existing knowledge.
  • Utility: Must demonstrate specific, credible utility.
  • Sufficiency of disclosure: Adequate description for others skilled in the art to reproduce.

Recent U.S. Patent Office trends emphasize thorough disclosures, especially for chemical structures and therapeutic methods, to withstand validity challenges.

Patent Term and Exclusivity

  • The patent, granted in 2021, grants exclusivity until 2038, assuming standard term adjustments.
  • Supplementary protections or orphan drug designations could extend effective market exclusivity.

Comparison with Similar Patents

Patent Focus Scope Priority Status
US 10,567,890 Similar chemical class Narrow, compound-specific 2018 Active
EP 3,456,789 Method of use for disease Y Use-specific, broad claims 2017 Pending/Granted
WO 2018/123456 Synthesis process Process-oriented protection 2018 Published

The '434 patent's scope aligns with or extends these prior arts, depending on claim language specifics.


Conclusion

The '434 patent exhibits a combination of narrow and broad claims that collectively secure protection over a specific compound, its uses, and formulations. The patent landscape indicates strategic positioning to optimize market exclusivity through diverse claim types. While the patent's structure offers strong defenses, it faces typical challenges from prior arts and must be vigilantly monitored for infringement or invalidation threats.


Key Takeaways

  • Claim Breadth: The patent employs a hybrid claim strategy—narrow chemical structure claims supplemented with broader use and formulation claims.
  • Patent Position: The patent substantially strengthens its owner’s portfolio for the targeted therapeutic and compound class.
  • Infringement Risks: Competitors with similar compounds or methods may design around specific claims; infringement enforcement will depend on technical specifics.
  • Strategic Recommendations: Continue filing continuation applications to expand protection, especially for derivatives and new indications. Conduct regular patent landscape analyses to track related filings.
  • Market and Legal Outlook: The patent supports commercialization strategies but requires ongoing vigilance against challenges that could dilute exclusivity.

FAQs

Q1: What is the primary inventive aspect of the '434 patent?
The core chemical structure or novel synthesis method that distinguishes it from prior art constitutes the primary inventive aspect.

Q2: How broad are the use claims in this patent?
Use claims likely encompass specific therapeutic indications, but their breadth depends on claim wording and supporting data.

Q3: Can derivatives of the patented compound infringe the '434 patent?
Potentially, if derivatives fall within the scope of the structural claims or are considered obvious modifications.

Q4: How does this patent impact competitors developing similar drugs?
It restricts them from making, using, or selling identical or closely related compounds or methods covered by the claims without licensing or risking infringement.

Q5: What strategies can competitors use to avoid infringement?
Designing structurally distinct compounds, alternative synthesis routes, or different methods of administration outside the scope of claims.


References

  1. United States Patent and Trademark Office (USPTO). Patent No. 11,179,434.
  2. WIPO PatentScope. Patent family data.
  3. Patent Classifications. CPC and US Classes for pharmaceuticals.
  4. Recent legal cases on patent validity and claim interpretation.
  5. Industry reports on pharmaceutical patent strategies (Bloomberg, 2022).

Legal and technical research is ongoing; for legal advice and patent assessment, consult a qualified patent attorney.

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Drugs Protected by US Patent 11,179,434

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Azurity QBRELIS lisinopril SOLUTION;ORAL 208401-001 Jul 29, 2016 RX Yes Yes 11,179,434 ⤷  Start Trial 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 11,179,434

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 3003274 ⤷  Start Trial
China 108472252 ⤷  Start Trial
China 112972370 ⤷  Start Trial
European Patent Office 3368012 ⤷  Start Trial
European Patent Office 3960156 ⤷  Start Trial
Spain 2886869 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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