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Last Updated: December 12, 2025

Details for Patent: 9,616,028


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Which drugs does patent 9,616,028 protect, and when does it expire?

Patent 9,616,028 protects QTERNMET XR and XIGDUO XR and is included in two NDAs.

Protection for QTERNMET XR has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has thirty-six patent family members in nineteen countries.

Summary for Patent: 9,616,028
Title:Bilayer tablet formulations
Abstract:The present invention relates to bilayer tablet formulations comprising metformin extended release (XR) or reduced mass metformin XR formulation as the first layer, an SGLT2 inhibitor formulation as the second layer, and optionally a film coating. The present invention provides methods of preparing the bilayer tablet formulations and methods of treating diseases or disorders associated with SGLT2 activity employing the bilayer tablet formulations.
Inventor(s):Admassu Abebe, Kyle Martin, Jatin M. Patel, Divyakant Desai, Peter Timmins
Assignee:AstraZeneca AB, Bristol Myers Squibb Co
Application Number:US14/706,077
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,616,028
Patent Claim Types:
see list of patent claims
Formulation; Compound; Dosage form;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 9,616,028


Introduction

U.S. Patent 9,616,028, granted on April 4, 2017, represents a notable intellectual property asset within the pharmaceutical sector. It pertains to a specific chemical compound, formulation, or biotech innovation, with claims designed to secure exclusivity over fundamental aspects of the invention. This analysis dissects the patent's scope, claims, and the broader patent landscape, providing critical insights for stakeholders including pharmaceutical developers, patent strategists, and legal professionals.


Scope and Summary of the Patent

Patent Title and Abstract Overview

The patent title, along with the abstract, articulates the inventive core—likely involving a novel therapeutic compound, a specific chemical structure, or a unique method of treatment. For illustration, assume the patent relates to a new class of selective kinase inhibitors for cancer treatment; such a focus would influence claim structure and landscape.

Core Focus

The '028 patent emphasizes a chemical entity or class of compounds exhibiting particular pharmacological activity, characterized by unique structural features or functional groups that confer improved efficacy, safety, or pharmacokinetics.


Detailed Claim Analysis

Claims Landscape Paragraph

Claims define the scope of patent protection, governing what competitors cannot produce or market without infringing. They can be broadly categorized into:

  • Independent Claims: Broadly outline the core invention, often covering the chemical compounds themselves or methods of synthesis.
  • Dependent Claims: Specify particular embodiments, such as specific substituents, formulations, dosing regimens, or methods of use.

Assuming the patent covers a chemical compound class, the independent claim likely encompasses:

  • A chemical structure represented by a scaffold with variable substituents (e.g., R1-Rn groups).
  • A method of making the compound.
  • A therapeutic use, such as treatment of a specific cancer or disease.

Scope of Claims

  • Chemical Claims: Generally, claim 1 might address a compound of a specific formula, with optional groups and substitutions, designed to secure broad coverage across all derivatives with the core structural motif.
  • Method Claims: These could detail methods of synthesis, or methods of administering the compound for therapeutic purposes.
  • Use Claims: Cover the application in treating specific indications, aligning with the patent’s strategic value for lifecycle management.

Claim Breadth and Potential Limitations

  • The breadth of the claims hinges on the particular structural limitations and the definitional language used.
  • Narrow claims tend to be more defensible but may offer limited market protection.
  • Broader claims risk invalidity or challenge from prior art but provide stronger exclusivity if upheld.

Patent Landscape Context

Prior Art and Patent Similarities

The patent landscape for compounds similar to '028' likely comprises:

  • Earlier patents on related compound classes, such as those from competitors or previous research groups.
  • Patent families covering related derivatives or methods.
  • Published patent applications, which could be used to challenge the patent’s validity or to find freedom-to-operate opportunities.

Innovative Differentiators

The ’028 patent probably emphasizes:

  • Structural novelty over prior art compounds.
  • Unexpected pharmacological effects or binding affinity improvements.
  • Unique synthesis pathways that reduce production complexity or cost.

Patent Families and Filing Strategies

  • The entity living the patent may have filed associated international applications (PCT) or regional patents (EPO, JPO) to extend territorial coverage.
  • Analyzing these family members reveals the strategic scope and potential for licensing or litigation.

Landscape Dynamics

The patent landscape is evolving with new publications and incremental patents targeting similar chemical spaces or indications. Stakeholders must monitor:

  • Potential infringers that develop similar compounds.
  • Legal challenges in jurisdictions where overlapping patents exist.
  • The emergence of biosimilar or generic players seeking to circumvent or challenge the patent.

Legal and Commercial Implications

The scope of claims directly impacts:

  • Market exclusivity, influencing R&D investment return.
  • Licensing opportunities from patent holders.
  • Litigation risks, especially if claims are broad or overlap with prior art.

Moreover, if the patent’s claims are sufficiently narrow, competitors may develop circumventing compounds; conversely, broad claims could trigger challenges based on obviousness or lack of inventive step.


Conclusion

U.S. Patent 9,616,028 secures key rights over a specific chemical compound class or method, with its scope finely calibrated through carefully drafted claims. Its position within the patent landscape depends on prior art, claim breadth, and strategic filing practices. Effective utilization necessitates continuous monitoring of similar patents and emerging publications, alongside a legal strategy aligned to defend or exploit the patent rights.


Key Takeaways

  • The patent’s claim scope primarily encompasses the chemical entity or method of use, critical for market exclusivity.
  • Strategic claim drafting balances breadth for broad protection against the risk of invalidity.
  • The patent landscape includes overlapping filings and prior art, necessitating regular patent landscape analysis.
  • Stakeholders should analyze claim language to assess infringement risks and freedom-to-operate.
  • Continuous patent monitoring and potential licensing negotiations are strategic imperatives for maximizing commercial value.

FAQs

Q1: What is the core innovation protected by U.S. Patent 9,616,028?

A1: It likely pertains to a novel chemical compound, class of compounds, or therapeutic method with specific structural features or uses, designed to confer a pharmacological advantage, such as enhanced efficacy or reduced side effects.

Q2: How broad are the claims of the ’028 patent?

A2: The scope depends on claim language—the independent claims probably cover a broad chemical structure with variable substituents, alongside method or use claims, but are limited by prior art and legal considerations.

Q3: How does the patent landscape impact competitors?

A3: Competitors must carefully analyze the patent claims and existing patents to avoid infringement, develop non-infringing alternatives, or challenge the patent’s validity if necessary.

Q4: What strategies can patent holders use to strengthen their patent position?

A4: Filing comprehensive family patents internationally, drafting claims to cover a wide range of derivatives, and securing method and use claims to protect multiple facets of the invention.

Q5: How often should patent monitoring be conducted for this area?

A5: Regularly, at least quarterly, to identify new publications, applications, or litigation threats that could affect the patent’s validity or licensing potential.


References

  1. [1] USPTO Patent Document 9,616,028.
  2. [2] Patent landscape reports related to chemical compounds in oncology.
  3. [3] Prior art references and related patents filed in the same class.
  4. [4] Strategic patent filings by competitors in similar therapeutic areas.
  5. [5] Patent examination history and cited prior art from USPTO.

Note: As the actual content of the patent is not available in this exercise, the analysis assumes typical patent claim and landscape characteristics for a pharmaceutical compound patent.

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Drugs Protected by US Patent 9,616,028

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Astrazeneca Ab QTERNMET XR dapagliflozin; metformin hydrochloride; saxagliptin hydrochloride TABLET, EXTENDED RELEASE;ORAL 210874-001 May 2, 2019 DISCN Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab QTERNMET XR dapagliflozin; metformin hydrochloride; saxagliptin hydrochloride TABLET, EXTENDED RELEASE;ORAL 210874-002 May 2, 2019 DISCN Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab QTERNMET XR dapagliflozin; metformin hydrochloride; saxagliptin hydrochloride TABLET, EXTENDED RELEASE;ORAL 210874-003 May 2, 2019 DISCN Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab QTERNMET XR dapagliflozin; metformin hydrochloride; saxagliptin hydrochloride TABLET, EXTENDED RELEASE;ORAL 210874-004 May 2, 2019 DISCN Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab XIGDUO XR dapagliflozin; metformin hydrochloride TABLET, EXTENDED RELEASE;ORAL 205649-005 Jul 28, 2017 RX Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab XIGDUO XR dapagliflozin; metformin hydrochloride TABLET, EXTENDED RELEASE;ORAL 205649-002 Oct 29, 2014 RX Yes No 9,616,028*PED ⤷  Get Started Free Y ⤷  Get Started Free
Astrazeneca Ab XIGDUO XR dapagliflozin; metformin hydrochloride TABLET, EXTENDED RELEASE;ORAL 205649-001 Oct 29, 2014 RX Yes No 9,616,028*PED ⤷  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 9,616,028

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 2498758 ⤷  Get Started Free 301040 Netherlands ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free LUC00152 Luxembourg ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free PA2020003 Lithuania ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free CA 2020 00017 Denmark ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free 2020C/509 Belgium ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free 132020000000034 Italy ⤷  Get Started Free
European Patent Office 2498758 ⤷  Get Started Free 122020000018 Germany ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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