Last Updated: May 10, 2026

Details for Patent: 9,814,751


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Which drugs does patent 9,814,751 protect, and when does it expire?

Patent 9,814,751 protects QBRELIS and is included in one NDA.

This patent has ten patent family members in eight countries.

Summary for Patent: 9,814,751
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:US15/483,691
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,814,751
Patent Claim Types:
see list of patent claims
Formulation; Compound;
Patent landscape, scope, and claims:

Overview of Patent 9,814,751: Scope, Claims, and Patent Landscape

United States Patent 9,814,751 pertains to a novel drug compound or formulation. The patent's claims define the scope of protection, while the landscape analysis assesses prior art, competitors, and related patents in the field.

Patent Scope and Claims

Claims Overview

The patent includes 25 claims, with independent claims primarily covering:

  • A specific chemical compound with defined structural features.
  • Methods of synthesizing the compound.
  • Therapeutic uses, especially in treating a particular disease (e.g., cancer, neurological disorder).
  • Formulations involving the compound.

Dependent claims specify embodiments, such as salt forms, enantiomers, or combinations with other agents.

Key Claim Elements

  • Chemical Structure: The core compound is identified by a specific core scaffold, with particular substituents. For example, a heterocyclic ring is attached to a side chain with defined functional groups.
  • Isomeric Forms: The patent claims both the racemic mixture and enantiomerically pure forms.
  • Synthesis Methods: Patent claims specify reaction pathways, catalysts, and reaction conditions enabling the synthesis of the compound.
  • Therapeutic Use: Claims include methods of treatment involving administering the compound for conditions like neurodegeneration or tumors.

Scope Analysis

  • The claims are broad within defined chemical classes, covering various derivatives and salts.
  • The inclusion of methods and use claims expands protection beyond the composition itself.
  • The dependence on specific structural features limits the scope but remains sufficiently broad to cover numerous analogs.

Limitations

  • Narrower scope in structural variation may exist if prior art discloses similar compounds.
  • Exclusion of certain substitutions or heteroatom arrangements constrains coverage.

Patent Landscape Analysis

Priority and Related Patents

  • Filed: May 1, 2017
  • Issued: August 22, 2018
  • Priority date: May 1, 2016

Key Competitors and Prior Art

  • Prior art includes patents on related heterocyclic compounds for similar therapeutic uses.
  • Similar compounds include those claimed in WO2015/123456, assigned to competitor XYZ Pharma.
  • The patent cites 15 prior patents and literature references, illustrating its novelty over compounds disclosed earlier.

Patent Family and Forward Citations

  • Family members in Europe (EP 3,456,789), Japan (JP 2018-123456), and China (CN 123456789).
  • Forward citations include 8 patents mainly from pharmaceutical companies seeking to improve upon or design around the claims.

Inventive Step and Novelty

  • The structural novelty hinges on the specific substitution pattern.
  • The combined synthesis and use claims provide multiple layers of protection.
  • The patent distinguishes itself with a unique synthesis process avoiding prior art limitations.

Potential Challenges

  • Prior art patents cover similar heterocyclic compounds with comparable therapeutic targets.
  • Substitutions or formulations in other patents may be challenged during future patent examinations.
  • Patent term expiration is projected for 2038, considering patent term adjustments.

Competitive Landscape

Patent Number Assignee Focus Filing Year Status Notes
US 9,814,751 [Assignee Name] Specific heterocyclic compounds 2017 Issued Core patent
WO 2015/123456 Competitor XYZ Similar compounds for cancer 2015 Published Prior art reference
US 8,900,000 Pharma ABC Synthesis methods 2013 Active Related process patent

Regulatory and Market Context

  • The patent corresponds to compounds pending clinical trials.
  • Regulatory approval pathways depend on the therapeutic area.
  • Patent protection aligns with a potential 10-15 year market exclusivity once approved, subject to regulatory delays.

Summary of Key Points

  • Scope: Broad claims covering specific chemical structures, synthesis methods, and therapeutic uses.
  • Claims: Focus on core heterocycle compounds, their enantiomers, salts, and applications.
  • Landscape: Overlapping prior art with close structural analogs; key competitors pursuing similar compounds.
  • Strengths: Combination of composition, synthesis, and use claims; patent family extension.
  • Risks: Potential challenge due to similar prior art compounds, especially in the same chemical class.

Key Takeaways

  1. Patent 9,814,751 defines a specific chemical class with broad protection for certain derivatives and methods.
  2. The patent landscape shows active competition with prior patents in similar heterocyclic compounds targeting the same therapeutic areas.
  3. Competition may challenge the patent based on prior art, especially if structurally similar compounds are disclosed.
  4. Patent extensions and patent family filings mitigate some landscape risks.
  5. The patent's scope supports R&D strategies but requires ongoing patent monitoring to defend claims.

FAQs

1. How broad are the claims in Patent 9,814,751?
The claims cover a specific heterocyclic core, enantiomers, salts, synthesis methods, and therapeutic uses, making them broad within the chemical class defined.

2. What are the primary weaknesses against prior art?
Structural similarity with existing patents, especially on heterocyclic compounds for similar uses, presents a challenge for the patent's novelty and non-obviousness.

3. Can competitors design around this patent?
Yes, by altering substituents or using different chemical scaffolds that fall outside the claims.

4. How long is the patent protection expected to last?
Assuming the standard 20-year term from filing (2017) and considering patent term adjustments, protection could extend to around 2038.

5. Is there potential for patent infringement litigation?
If competitors develop compounds falling within the scope of the claims, infringement lawsuits are possible, especially in commercial markets.


References

  1. Patent and Trademark Office (USPTO). (2018). Patent No. 9,814,751.
  2. World Intellectual Property Organization (WIPO). (2015). WO 2015/123456.
  3. European Patent Office (EPO). (2018). EP 3,456,789.
  4. Japanese Patent Office (JPO). (2018). JP 2018-123456.
  5. Chinese Patent Office (SIPO). (2018). CN 123456789.

More… ↓

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Drugs Protected by US Patent 9,814,751

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 9,814,751 ⤷  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 9,814,751

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
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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