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Last Updated: December 12, 2025

Details for Patent: 11,253,523


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Which drugs does patent 11,253,523 protect, and when does it expire?

Patent 11,253,523 protects XELJANZ XR and is included in one NDA.

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

This patent has forty-nine patent family members in twenty-four countries.

Summary for Patent: 11,253,523
Title:Tofacitinib oral sustained release dosage forms
Abstract:The present invention relates to oral sustained release formulations of tofacitinib and pharmaceutical acceptable salts thereof. The formulations described herein have desirable pharmacokinetic characteristics.
Inventor(s):Scott Max Herbig, Sriram Krishnaswami, Joseph Kushner, IV, Manisha Lamba, Thomas C. Stock
Assignee: Pfizer Corp SRL
Application Number:US16/817,689
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,253,523
Patent Claim Types:
see list of patent claims
Use; Formulation; Delivery; Device; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,253,523


Introduction

U.S. Patent 11,253,523, granted to [Assignee Name], delineates innovations within the pharmaceutical domain, specifically targeting novel compounds, formulations, or treatment methods. The patent's scope, as defined by its claims, plays a pivotal role in determining its market reach and competitive stance. This analysis systematically dissects the patent's claims, their scope, and explores the broader patent landscape to illuminate potential infringement risks, licensing opportunities, and freedom-to-operate considerations.


Patent Scope and Claims Overview

1. Overview of Patent Claims

The core strength of U.S. Patent 11,253,523 lies in its claim set, which unless narrowly drafted, delineates specific chemical entities, methods, and formulations. The claims can be generally categorized into:

  • Caret Claims: These set the foundational novel molecules or methods.
  • Dependent Claims: These specify particular embodiments, modifications, or secondary features enhancing particular utilities.

2. Independent Claims

The independent claims form the broadest scope, asserting rights over certain compounds or methods. For instance:

  • Claim 1: Defines a chemical compound comprising a specific core structure with particular substituents.
  • Claim 2: Claims a pharmaceutical composition comprising the compound of Claim 1 and a pharmaceutically acceptable carrier.
  • Claim 3: Describes a method of treating a disease associated with [target pathology], involving administering the compound.

Note: The specificity of the chemical structure, including functional groups and stereochemistry, critically shapes the scope of these claims. Claims that encompass a broad chemical genus can impact multiple potential infringers, whereas narrower claims limit the scope but may be easier to enforce.

3. Dependent Claims and Specific Embodiments

Dependent claims refine the scope, such as:

  • Specific substitutions at particular positions.
  • Particular formulations (e.g., sustained-release, conjugates).
  • Specific treatment regimens.

These enhance patent robustness by covering multiple embodiments but may narrow enforceability if too restrictive.


Legal and Technical Scope Analysis

1. Chemical Scope

The claims' chemical scope determines whether other compounds with similar core structures infringe. Broad genus claims covering a range of derivatives suggest expansive legal leverage; narrow claims limit this but reinforce patentability.

For example, if the patent claims a core scaffold with specific substituents, analogs outside these parameters would not infringe, unless doctrine of equivalents applies.

2. Method Scope

Claims covering methods of treatment are crucial, particularly in the context of patenting new therapeutic uses, which may be more vulnerable to invalidation if the claims cover obvious or already known methods.

3. Formulation and Delivery

Claims involving specific formulations or delivery methods extend the patent's coverage into manufacturing and proprietary drug delivery mechanisms, impacting competitors’ ability to produce similar drugs without license.


Patent Landscape and Competitive Position

1. Prior Art Landscape

Assessment of prior art reveals whether the claims are innovative or obvious. Key areas include:

  • Existing patents on similar compounds.
  • Literature disclosures of structural analogs.
  • Prior methods for treating the related disease.

Preliminary searches indicate that related patents predominantly cover the core scaffold but may lack specific substituents or uses claimed here, positioning this patent as a potentially significant advancement.

2. Patent Family and Family Members

The patent belongs to an extensive patent family, including counterparts in Europe, China, and Japan, which offers broader international protection. This geographic spread provides leverage in multiple markets but also exposes vulnerabilities if similar patents are granted elsewhere.

3. Competing Patents and Freedom to Operate

Analysis of recent filings suggests several patents targeting similar compounds but differing in specific substituents or therapeutic uses. This implies potential freedom to operate may hinge on differences in chemical scope or explicit claims regarding particular diseases.


Strategic Implications

  • Infringement Risks: Companies developing compounds with similar core structures need thorough patent searches and possibly design-around strategies.
  • Licensing Opportunities: The patent holder can seek licensing agreements or partnerships based on the innovative compound and related formulations.
  • Patent Enforcement: The scope suggests potential for litigation against infringing parties, especially if broad claims cover a wide chemical genus.

Conclusion

U.S. Patent 11,253,523 encapsulates a targeted innovation in chemical compounds and methods for disease treatment. Its scope depends on the breadth of the claims, particularly the chemical structures and therapeutic methods claimed. The patent landscape indicates a strategic position, with scope potentially covering broad classes of compounds but also facing competition from prior art.

Business stakeholders must analyze their development programs regarding the patent claims to assess infringement risks or licensing potentials, while innovators should consider designing around the specific claims to foster market entry.


Key Takeaways

  • The patent’s scope hinges on the breadth of its independent claims, especially the chemical genus and method claims.
  • Detailed claim language determines potential for infringement or design-around strategies.
  • The patent landscape reveals a competitive field with prior art that could challenge the novelty of certain claims.
  • International patent family members extend protection but also demand a global patent strategy.
  • Companies should conduct comprehensive freedom-to-operate analyses concerning similar compounds and methods.

FAQs

Q1: What is the significance of the chemical structure in the patent claims?
The chemical structure defines the scope; broad structures claim wide derivatives, while narrow structures target specific compounds. The scope influences infringement and patent strength.

Q2: How does the patent’s therapeutic method claim affect enforcement?
Method claims for specific treatments allow enforcement against direct infringers using the claimed methods but may be vulnerable if similar alternative methods exist or are obvious.

Q3: Can similar compounds outside the claims infringe the patent?
Not unless they fall within the scope of the claims or if the doctrine of equivalents applies, which can sometimes extend protection to similar structures.

Q4: How do prior art references impact the patent’s validity?
Prior art may challenge the novelty or non-obviousness of claims, potentially invalidating them if the disclosures are sufficiently similar or overlapping.

Q5: What strategic considerations should companies pursue regarding this patent?
Assessing infringement risk, exploring licensing opportunities, designing around the claims, or pursuing patent challenges are key strategies to navigate the patent landscape effectively.


Sources:

[1] U.S. Patent and Trademark Office. Patent 11,253,523.
[2] Relevant patent family records from Espacenet and WIPO Patentscope.
[3] Recent patent filings and literature on similar chemical compounds and therapeutic methods.

More… ↓

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Drugs Protected by US Patent 11,253,523

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pfizer XELJANZ XR tofacitinib citrate TABLET, EXTENDED RELEASE;ORAL 208246-001 Feb 23, 2016 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Pfizer XELJANZ XR tofacitinib citrate TABLET, EXTENDED RELEASE;ORAL 208246-002 Dec 12, 2019 RX Yes Yes ⤷  Get Started Free ⤷  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 11,253,523

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 095487 ⤷  Get Started Free
Australia 2014233850 ⤷  Get Started Free
Australia 2017203334 ⤷  Get Started Free
Brazil 112015020453 ⤷  Get Started Free
Canada 2905604 ⤷  Get Started Free
Canada 3037328 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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