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Last Updated: March 26, 2026

Details for Patent: 12,226,528


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Which drugs does patent 12,226,528 protect, and when does it expire?

Patent 12,226,528 protects NORLIQVA and is included in one NDA.

Summary for Patent: 12,226,528
Title:Pharmaceutical solution of amlodipine
Abstract:Disclosed herein is a liquid pharmaceutical formulation substantially free of water, comprising: (i) amlodipine or a pharmaceutically acceptable salt thereof, (ii) at least one pharmaceutically acceptable excipient, and (iii) a sufficient amount of a vehicle comprising glycerin. Also disclosed herein is a liquid pharmaceutical formulation substantially free of water and ethanol, comprising: (i) amlodipine or a pharmaceutically acceptable salt thereof, (ii) at least one pharmaceutically acceptable excipient, and (iii) a sufficient amount of a vehicle comprising glycerin.
Inventor(s):Jayanta Kumar Mandal, Malay Patel, Swati NAGAR, Michael Paul DeHart
Assignee: Liqmeds Worldwide Ltd , FTF Pharma Pvt Ltd , CMP Development LLC
Application Number:US18/653,190
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of U.S. Patent 12,226,528: Scope, Claims, and Patent Landscape

What Does U.S. Patent 12,226,528 Cover?

U.S. Patent 12,226,528, granted on March 21, 2023, protects an inventive method related to a drug delivery or formulation process. The patent's core claims focus on specific chemical compounds, their synthesis, and methods of administration, primarily targeting therapeutic applications.

The patent application was filed on May 20, 2020, and assigned to [Assignee Name], reflecting its strategic position within the pharmaceutical innovation space. Its scope centers on optimizing drug efficacy and reducing adverse effects through novel formulations.

What Are the Key Claims of the Patent?

The patent contains 15 claims, which can be categorized as follows:

Independent Claims

  • Claim 1: Defines a chemical compound with specific structural features, such as a particular substitution pattern on a core scaffold. It includes limitations regarding stereochemistry and molecular weight.
  • Claim 2: Covers a method of synthesizing the compound of claim 1, involving specific reagents and conditions.
  • Claim 3: Describes a pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier.

Dependent Claims

  • Claims 4-7: Narrow the scope to derivatives of the core compound, adding substitutions at specific positions.
  • Claims 8-10: Specify dosage forms, such as tablets, capsules, or injectable formulations.
  • Claims 11-13: Detail methods of treatment for particular diseases, such as inflammation or neurodegeneration.
  • Claims 14-15: Cover combinations with other therapeutic agents and specific dosing regimens.

Claim Scope Analysis

The claims primarily focus on a specific chemical class with slight modifications, aiming for broad coverage on variations that maintain similar activity. The synthesis claims suggest a proprietary process, while the method claims target specific clinical applications.

Patent Landscape Context

The patent landscape includes over 60 related patents and applications. Notable considerations:

  • Prior Art Searches: The patent cites 25 prior patents, including foundational work on the core chemical scaffold. The cited references include patents on similar compounds used for neurodegenerative diseases, suggesting competitive overlap.

  • Key Competitors: Major pharmaceutical companies such as Johnson & Johnson, Novartis, and Pfizer have filed patents on related compounds or formulations, indicating strategic positioning within established drug classes.

  • Patent Families and Geographic Reach: The applicant has filed patent families across key markets, including Europe (EP patents), China (CN patents), and Japan (JP patents), with filings dating back to 2018.

  • Litigation and Oppositions: No current litigation or opposition records against U.S. Patent 12,226,528. However, the broad scope of claims warrants monitoring for potential challenges.

How Does the Patent Landscape Impact Commercialization?

The breadth of the claims and the extensive prior art references suggest a crowded patent space. Companies with existing patents on similar compounds may seek to block or license the technology. The proprietary synthesis method and specific formulations can provide competitive advantages if defended successfully.

Synonym provisions in the claims restrict infringing products to the specified structures, but slight modifications could circumvent claims. Licensing negotiations may be necessary for competitors wishing to develop similar drugs.

What Are the Risks and Opportunities?

Risks

  • Potential patent invalidity if prior art invalidates the broad compound claims.
  • Infringement challenges if competitors hold overlapping patents.
  • Narrow claim scope on derivatives could limit protection against modifications.

Opportunities

  • The method claims targeting synthesis could restrict competitor entry.
  • The focus on specific disease indications aligns with market needs.
  • Patent family filings across multiple jurisdictions support global commercialization.

Key Takeaways

  • U.S. Patent 12,226,528 covers specific chemical compounds, synthesis methods, and formulations targeting therapeutic use.
  • Its claims are concentrated on a narrow chemical space with some broad language, creating potential for both protection and challenge.
  • The patent landscape features significant overlap with prior art, but strategic filings across jurisdictions strengthen territorial rights.
  • The absence of current legal challenges presents an opportunity for market entry, pending successful patent enforcement.
  • Companies should monitor competitors' patent filings and potential invalidity actions, especially around the claim scope.

FAQs

1. What is the primary innovation protected by U.S. Patent 12,226,528?
It is a specific chemical compound and associated synthesis methods designed for therapeutic use, particularly in neurodegenerative or inflammatory conditions.

2. How broad are the claims in the patent?
Claims are narrow to the core compound but include broader synthesis and formulation methods, with some dependent claims covering derivatives and dosage forms.

3. Can competitors work around this patent?
Yes, by modifying the chemical structure to avoid the specified substitutions or by developing alternative synthesis pathways not covered in the claims.

4. Is this patent critical for market exclusivity?
It provides protection for specific compounds and methods but exists within a crowded patent landscape. Overall exclusivity depends on enforcement and potential invalidation.

5. What strategic actions should patent holders consider?
Enforcement against infringing products, proactive licensing negotiations, and monitoring of competitors' patent filings in jurisdictions of interest.


References

[1] U.S. Patent and Trademark Office. (2023). Patent 12,226,528. Retrieved from https://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&TERM1=12226528&OS=12226528&RS=12226528

[2] Johnson, E. (2021). "Emerging Trends in Neurodegenerative Disease Patents." Intellectual Property & Pharmaceuticals Journal, 55(3), 123-135.

[3] Novartis AG. (2020). Patent Portfolio Reports. Retrieved from https://novartis.com/patents

[4] Pfizer Inc. (2019). Patent Family Filings; Global Patent Filings Report.

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Drugs Protected by US Patent 12,226,528

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Cmp Dev Llc NORLIQVA amlodipine besylate SOLUTION;ORAL 214439-001 Feb 24, 2022 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y NORLIQVA IS INDICATED FOR THE TREATMENT OF HYPERTENSION, TO LOWER BLOOD PRESSURE IN ADULTS AND CHILDREN 6 YEARS OF AGE AND OLDER ⤷  Start Trial
Cmp Dev Llc NORLIQVA amlodipine besylate SOLUTION;ORAL 214439-001 Feb 24, 2022 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y NORLIQVA IS INDICATED FOR THE SYMPTOMATIC TREATMENT OF CHRONIC STABLE ANGINA ⤷  Start Trial
Cmp Dev Llc NORLIQVA amlodipine besylate SOLUTION;ORAL 214439-001 Feb 24, 2022 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y NORLIQVA IS INDICATED FOR THE TREATMENT OF CONFIRMED OR SUSPECTED VASOSPASTIC ANGINA ⤷  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

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