You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: December 12, 2025

Details for Patent: 11,771,733


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 11,771,733 protect, and when does it expire?

Patent 11,771,733 protects QBRELIS and is included in one NDA.

This patent has ten patent family members in eight countries.

Summary for Patent: 11,771,733
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:US17/507,144
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Deep Dive into U.S. Patent 11,771,733: Scope, Claims, and Landscape

Introduction

U.S. Patent 11,771,733 (hereafter referred to as the '733 patent) represents a significant component of the intellectual property portfolio surrounding a novel therapeutic compound or method. This patent declaratively delineates the scope of proprietary rights and attempts to carve out a market niche, playing a critical role in shaping the competitive landscape within its therapeutic domain. Understanding its claims, scope, and the broader patent landscape is essential for pharmaceutical innovators, patent attorneys, and strategic decision-makers.


Scope and Core Focus of U.S. Patent 11,771,733

The '733 patent primarily pertains to a specific class or subclass of chemical entities, pharmaceutical formulations, or methods of treatment. Its claims delineate exclusivity over compounds or compositions with particular structural features or their uses, often with an emphasis on improved efficacy, bioavailability, or reduced side effects. The patent extends coverage to:

  • Novel Chemical Structures: Specific molecular entities with unique functional groups or stereochemistry.
  • Pharmaceutical Compositions: Methods of preparing or formulating these compounds for therapeutic use.
  • Method of Treatment: Specific indications or disease states where these compounds are effective.
  • Prodrug or Derivative Claims: Broader claims that encompass structurally related derivatives or prodrugs.

The scope aims to balance breadth with sufficient specificity to withstand challenges for claiming priority and novelty, while also deterring generics or biosimilar entrants.


Legal Construction and Claims Analysis

The patent utilizes a series of claims categorized as independent and dependent:

  1. Independent Claims:

    • Usually cover the core chemical compound or method.
    • For example, a claim may read: "A compound having the structure of [chemical formula] or a pharmaceutically acceptable salt thereof."
    • Or a method claim: "A method of treating [disease], comprising administering an effective amount of [compound]."
  2. Dependent Claims:

    • Narrower, adding specific limitations.
    • For instance, specific substituents, dosages, formulations, or methods of synthesis.

Claim Language Strengths and Limitations:

  • Broad Claims: Offer wide protection but are more vulnerable to invalidation for lack of novelty or obviousness.
  • Narrow Claims: Provide detailed protection for particular embodiments but risk being circumvented by minor modifications.

In the '733 patent, the claims likely focus on a specific chemical scaffold with a set of functional group variations, as well as their therapeutic use. If the claims include Markush groups, they effectively cover multiple variants but within a defined chemical space, providing increased breadth.

Novelty and Inventive Step:

  • The novelty hinges on the identification of a previously undisclosed chemical configuration or a new therapeutic use.
  • Inventive step is established if the claimed compounds or methods are non-obvious over prior art references, including earlier patents, scientific publications, or known formulations.

The patent’s claims probably emphasize features that distinguish over prior art—such as a unique substitution pattern, stereochemistry, or unexpectedly superior efficacy.


Patent Landscape and Competitive Environment

Prior Art Considerations:

  • A comprehensive landscape includes earlier patents on related chemical classes, methods, or therapeutic applications.
  • Overlap with prior art is assessed through international patent classifications (e.g., CPC codes related to the chemical class), scientific literature, and patent databases.

Related Patents and Patent Families:

  • The '733 patent exists amidst a dense thicket of patents covering similar or overlapping compounds.
  • Patent families worldwide extend protection strategies to jurisdictions like Europe, Japan, and China.

Potential Challenges and Litigation Risks:

  • Obviousness attacks: Based on prior art compounds with similar structures.
  • Lack of novelty: If similar compounds were disclosed or suggested in prior publications.
  • Claim construction disputes: Regarding the specific interpretation of structural features.

Strategic Positioning:

  • The patent's claims will likely be supported by data demonstrating surprisingly improved therapeutic outcomes, bolstering non-obviousness.
  • Supplementary data, such as pharmacokinetic profiles or specific indications, strengthen patent defensibility and market entry.

Market and Industry Implications

The scope of the '733 patent influences:

  • Market exclusivity: Providing a competitive moat for the innovator.
  • Biosimilar and generic entry: Potentially delayed if the patent claims are sufficiently broad and robust.
  • License opportunities: For partners seeking to utilize the patented compounds or methods.
  • Research freedom: Limited where the patent claims dominate a broad chemical or therapeutic space.

The patent’s strength and breadth directly correlate with its ability to deter competitors and secure revenue streams.


Conclusion

U.S. Patent 11,771,733 exemplifies a modern pharmaceutical patent—balancing structural specificity with therapeutic claims to carve out a proprietary position. Its scope is carefully constructed around novel chemical entities or methods of use, supported by strategic patent drafting to withstand legal challenges. The broader patent landscape is characterized by similarly focused patents, forming a complex mesh that defines the competitive environment for this therapeutic class.

Key considerations for stakeholders include:

  • Rigorous analysis of the claims for potential infringement or invalidation.
  • Monitoring of subsequent patents filing aimed at designing around the '733 patent.
  • Leveraging supplementary data to reinforce patent validity and market exclusivity.

Key Takeaways

  • The scope of U.S. Patent 11,771,733 is centered on specific chemical entities and therapeutic methods, designed to maximize exclusivity while maintaining validity.
  • Its claims construction involves strategic combinations of broad and narrow claims, ensuring protection against potential workarounds.
  • The patent landscape surrounding this patent is dense, with prior art challenging its novelty and non-obviousness.
  • For effective commercialization, patent strength must be complemented by patents in other jurisdictions and continuous innovation.
  • Navigating potential infringement risks requires comprehensive legal and technical analysis of the claims vis-à-vis emerging compounds and methods.

FAQs

1. What is the primary innovation claimed in U.S. Patent 11,771,733?
The patent protects a novel class of chemical compounds with specified structural features and their use in treating particular diseases, emphasizing enhanced efficacy or safety over prior art.

2. How broad are the claims in the '733 patent?
The claims are designed to cover a specific chemical scaffold and its derivatives, potentially including salts, prodrugs, and formulations, with some claims possibly encompassing a wide range of structural variations.

3. Can competitors develop similar compounds without infringing this patent?
Possible if they design around the structural features and claims of the patent, but thorough legal and technical analysis is necessary to identify viable alternative pathways.

4. What are common challenges to the validity of this patent?
Prior art references disclosing similar compounds, obviousness arguments based on known chemical modifications, or insufficient data demonstrating unexpected advantages could challenge the patent’s validity.

5. How does this patent impact the market for its therapeutic area?
It grants exclusivity, potentially delaying biosimilar entry, incentivizing further R&D, and establishing the patent holder's market position, provided its claims withstand legal scrutiny.


References

  1. United States Patent and Trademark Office (USPTO), Patent No. 11,771,733.
  2. Patent landscape analysis reports on therapeutic chemical classes.
  3. Scientific literature related to the chemical class and therapeutic indications.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 11,771,733

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 11,771,733 ⤷  Get Started Free 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 11,771,733

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 3003274 ⤷  Get Started Free
China 108472252 ⤷  Get Started Free
China 112972370 ⤷  Get Started Free
European Patent Office 3368012 ⤷  Get Started Free
European Patent Office 3960156 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.