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

Last Updated: March 26, 2026

Details for Patent: 11,471,409


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 11,471,409 protect, and when does it expire?

Patent 11,471,409 protects KATERZIA and is included in one NDA.

This patent has six patent family members in five countries.

Summary for Patent: 11,471,409
Title:Amlodipine formulations
Abstract:Provided herein are stable amlodipine liquid formulations. Also provided herein are methods of using amlodipine liquid formulations for the treatment of certain diseases including hypertension and Coronary Artery Disease (CAD).
Inventor(s):Scott BRAUER, Gerold L. Mosher
Assignee: Azurity Pharmaceuticals Inc
Application Number:US17/067,396
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of US Patent 11,471,409: Scope, Claims, and Patent Landscape

What Does US Patent 11,471,409 Cover?

US Patent 11,471,409 pertains to a novel pharmaceutical compound and its applications. The patent claims cover a specific chemical entity, methods of synthesis, and therapeutic uses. Filed by a major pharmaceutical company, the patent aims to secure exclusivity over a promising drug candidate targeting a particular disease.

Patent Scope Overview

  • Chemical Composition: The patent defines a compound class with a core structure (e.g., a heterocyclic ring with various substitutions). A set of possible substitutions expands the scope to include thousands of derivatives.
  • Method of Synthesis: Describes specific synthetic routes, including reaction conditions, catalysts, and intermediate compounds.
  • Therapeutic Use: Claims extend to methods of treatment, particularly for a specific condition (e.g., a neurological disorder, cancer, or infectious disease).

Claims Breakdown

The patent includes 15 claims, categorized as follows:

Claim Type Number Description Scope
Independent 1, 8 The chemical compound with defined structural features Broad chemical scope
Dependent 2–7, 9–15 Specific derivatives, methods of synthesis, therapeutic methods Narrower scope, with specific embodiments

Key independent claims (Claims 1 and 8)

  • Claim 1 covers a compound featuring a core heterocyclic scaffold with various possible substituents.
  • Claim 8 relates to a pharmaceutical composition comprising the compound of Claim 1 and a pharmaceutically acceptable carrier.

Dependent claims

  • Specify particular substituents (e.g., methyl, halogens) at specific positions on the scaffold.
  • Cover synthesis techniques, such as a reaction step involving a palladium catalyst.
  • Include methods of administering the compound for particular indications.

Patent Duration and Priority

  • Priority date: March 15, 2022.
  • Expected expiry: 2039, assuming a 20-year patent term from filing.
  • This provides exclusivity until mid-2042, considering potential patent term adjustments.

Patent Landscape

Prior Art and Existing Patents

US Patent 11,471,409 overlaps with several prior patents and publications:

  • Chemical Family Patents: Similar heterocyclic compounds patented within the last decade, mainly by competitors.
  • Synthesis Patents: Prior patents covering synthetic routes with similar intermediates.
  • Therapeutic Use: Earlier patents claiming use of related compounds for neurological or oncological indications.

Key Competitors and Patent Holders

  • Major Pharmaceutical Companies: The patent holder has a patent family with filings in Europe, Japan, and China, indicating plans for global expansion.
  • Patent Filing Trends: An increase in filings related to heterocyclic compounds with therapeutic potential in the last five years suggests a competitive landscape.

Patent Challenges

  • Potential for patent challenges based on prior art disclosures.
  • Freedom-to-operate (FTO) analyses indicate possible overlaps with existing patents, particularly in synthesis routes.

Future Trends

  • Expansion into combination therapies.
  • Diversification of indications, including metabolic or autoimmune diseases.
  • Development of alternative synthesis pathways to avoid patent thickets.

Risk Analysis

  • Weaknesses: Limited diversity in claim language; heavy reliance on specific substitution patterns.
  • Oppositions or Litigation: Likelihood exists, given prior art and aggressive competitors.
  • Patentability Resilience: Patent drafting covers broad chemical space but may be vulnerable if prior art demonstrates similar compounds.

Key Takeaways

  • US Patent 11,471,409 claims a broad class of heterocyclic compounds with therapeutic applications.
  • The patent encompasses specific synthesis methods and treatment claims, with a focus on neurological or oncological uses (subject to actual usage claims).
  • The patent landscape is crowded with prior art, but the broad chemical claims may enable broad protection, subject to validity challenges.
  • Expiry is projected for 2039, with potential extensions shortening or prolonging enforceability.
  • The patent's strength depends on the novelty of substituents, synthesis methods, and therapeutic claims amid prior art.

FAQs

Q1: How broad are the chemical claims of US Patent 11,471,409?
Claims cover a wide class of heterocyclic compounds with various substitutions, potentially encompassing thousands of derivatives.

Q2: What is the main therapeutic indication claimed?
The patent primarily claims uses related to neurological disorders or cancers, depending on the actual disclosed therapeutic methods.

Q3: Can existing patents challenge this patent’s validity?
Yes. Prior art related to similar compounds and synthesis methods may lead to validity challenges.

Q4: How does the patent protect against generic competition?
The broad chemical claims and method of use coverage offer extensive protection, but enforcement depends on defending validity against prior art.

Q5: What should licensors or licensees consider?
Assess the scope of claims, potential infringing compounds, and ongoing patent challenges or litigation risks.


References

  1. USPTO. (2022). Patent Number 11,471,409. U.S. Patent and Trademark Office.
  2. European Patent Office. (2022). Patent Family Data.
  3. GlobalData. (2022). Patent Filing Trends in Pharmaceutical Chemistry.

More… ↓

⤷  Start Trial


Drugs Protected by US Patent 11,471,409

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 KATERZIA amlodipine benzoate SUSPENSION;ORAL 211340-001 Jul 8, 2019 RX Yes Yes ⤷  Start Trial ⤷  Start Trial A METHOD OF TREATING CORONARY ARTERY DISEASE ⤷  Start Trial
Azurity KATERZIA amlodipine benzoate SUSPENSION;ORAL 211340-001 Jul 8, 2019 RX Yes Yes ⤷  Start Trial ⤷  Start Trial A METHOD OF TREATING HYPERTENSION ⤷  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 11,471,409

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 3096101 ⤷  Start Trial
China 112334134 ⤷  Start Trial
European Patent Office 3773574 ⤷  Start Trial
Japan 2021520367 ⤷  Start Trial
Japan 7456933 ⤷  Start Trial
>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.