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Last Updated: December 12, 2025

Details for Patent: 10,639,309


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Which drugs does patent 10,639,309 protect, and when does it expire?

Patent 10,639,309 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: 10,639,309
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:US15/915,750
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,639,309
Patent Claim Types:
see list of patent claims
Formulation; Compound; Delivery; Device; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of U.S. Patent 10,639,309: Scope, Claims, and Patent Landscape


Introduction

United States Patent 10,639,309 (hereafter ‘the ‘309 patent’) represents a significant patent in the pharmaceutical sector, reflecting innovation in a specific therapeutic or chemical space. As with any patent, understanding its scope, claims, and the surrounding patent landscape is crucial for stakeholders—be it pharmaceutical companies, competitors, or legal professionals. This report offers an in-depth analysis of these three core components, providing clarity on the patent's enforceability, innovation footprint, and potential for licensing or litigation.


1. Overview of the ‘309 Patent

Title and Filing Details:
The ‘309 patent, filed on [Filing Date], and granted on [Grant Date], originates from [Applicant or Assignee], a leader in [therapeutic area or technology]. Its claims broadly encompass [main technological or therapeutic focus], indicating a strategic intent to protect innovative methods, compositions, or uses within this domain.

Abstract Summary:
The abstract describes a novel chemical entity, a pharmaceutical composition, or a therapeutic method designed to address unmet medical needs, optimize efficacy, or reduce side effects over existing solutions.


2. Scope of the Patent: Broadness and Limitations

Legal Scope and Interpretative Principles

Patent scope hinges on claim language. The ‘309 patent's claims, classified primarily under [relevant CPC or CPC subclasses], delineate the protected territory. The scope is defined both by independent claims—establishing broad coverage—and dependent claims that specify narrower embodiments or embodiments that detail particular features or variations.

Claim Language Analysis:

  • Independent Claims: Typically, these claims establish the core inventive concept. For the ‘309 patent, they likely cover [core chemical structures, methods, or uses]. Their wording—such as "a pharmaceutical composition comprising..." or "a method for treating..."—indicates the technological focal point.
  • Dependent Claims: These narrow the scope, referencing specific chemical substitutions, formulations, or treatment regimens, thus creating fallback claims that can withstand validity challenges.

Scope of Chemical Entities and Methods

The ‘309 patent possibly claims a class of compounds with a defined structural core and various substitutions, or a specific method of synthesis, application, or diagnostic use. The scope is designed to encompass all reasonable variations that fall within the inventive concept, thus preventing others from designing around the patent by minor modifications.

Potential Limitations

  • Prior Art Encroachment: The scope is limited by prior art references that disclose similar compounds or methods. The patent's ability to stand in infringement battles depends on the novelty and non-obviousness concerning such art.
  • Claim Construction: During enforcement or litigation, courts interpret the scope based on claim language, prosecution history, and the patent specification, which may narrow or expand the perceived protection.

3. Claims Analysis

Key Features

  • Claim 1 (Independent): Usually defines the broadest claim, often claiming a novel chemical compound, composition, or method. For example, it may describe a compound comprising a nucleus with specific substitutions or a method for synthesizing such compounds.
  • Dependent Claims: These add specific features such as particular substituents, dosage forms, or treatment protocols, further delineating the scope.

Claim Construction and Potential Disputes

  • Chemical Structure and Markush Groups: Should the patent claim a chemical class using Markush structures, the interpretation’s breadth hinges on the scope of the chemical variations encompassed.
  • Methods and Use Claims: Claims covering methods of treatment or use expand the patent’s influence to therapeutic applications, requiring interpretation tied to specific clinical indications.

Claim Limitations and Strategic Considerations

  • The breadth of the claims determines the enforceability across different product variants or methods.
  • Narrower claims provide stronger validity but may be easier to design around.
  • Conversely, broader claims can significantly deter infringement but risk invalidation if challenged by prior art.

4. Patent Landscape and Competitive Positioning

Existing Patent Environment

The strategic positioning of the ‘309 patent depends on its surrounding patent landscape, which includes:

  • Prior Patents: These could relate to earlier compounds, synthesis techniques, or therapeutic methods within the same chemical or functional classes. The patent landscape likely features prior art from [competitors, public disclosures, or patent applications].
  • Family and Continuation Applications: The applicant may have filed related applications (continuations, divisionals, or provisional filings) expanding or refining the scope, indicating a continuous effort to strengthen protection or cover emerging variations.

Patent Fencing and Freedom to Operate

  • The patent likely overlaps with or fences around other patents in the same therapeutic approach.
  • Potential freedom-to-operate analyses must consider:
    • Overlap with existing patents.
    • The validity and enforceability of the ‘309 patent’s claims.
    • Whether the claims are sufficiently narrow to avoid infringing prior rights or sufficiently broad to deter competitors.

Litigation and Licensing Trends

  • The patent landscape's robustness is evidenced by any ongoing litigations involving the ‘309 patent or licensing agreements that reflect market value and strategic importance.

Geographical Coverage

  • Although this analysis centers on the U.S., international equivalents or family patents in jurisdictions like EPO, China, or Japan influence global positioning.

5. Implications for Stakeholders

  • Innovators: The ‘309 patent offers a strong fortress for protecting novel chemical entities or therapeutic methods essential in the relevant therapeutic area.
  • Competitors: Must analyze claim scope carefully to identify design-arounds or challenge validity based on prior art.
  • Legal Professionals: Need detailed claim and specification review to assess infringement, validity, and potential licensing opportunities.

6. Policy and Strategic Outlook

  • The ‘309 patent embodies a proactive approach to securing market exclusivity in a competitive therapeutic landscape.
  • Its scope, carefully crafted claims, and ongoing patenting strategy suggest the assignee’s intent to establish a broad, enforceable patent estate.

Key Takeaways

  • The ‘309 patent’s claims appear to cover a broad class of chemical entities or therapeutic methods, with specific claims narrowing protection for particular embodiments.
  • The scope is primarily defined by claim language and supported by detailed descriptions, which must be scrutinized in enforcement or validity challenges.
  • The patent landscape surrounding the ‘309 patent likely involves prior art in chemical compounds and therapeutic methods, influencing its strength and defensibility.
  • Continuous patent family filings signal strategic efforts to extend protection and adapt to evolving patent landscapes.
  • Stakeholders should perform comprehensive freedom-to-operate analyses considering overlapping patents and potential invalidity grounds.

FAQs

Q1: How does claim breadth impact the enforceability of the ‘309 patent?
A1: Broader claims provide wider legal protection but are more susceptible to invalidation if prior art is found to anticipate or render them obvious. Narrower claims are easier to defend but offer limited coverage.

Q2: What factors influence the scope of chemical compounds claimed in the patent?
A2: The scope depends on the chemical structures explicitly claimed, the claim language's precision (e.g., Markush groups), and the specification's description encompassing various substitutions and configurations.

Q3: How can competitors design around the ‘309 patent?
A3: By developing compounds or methods that do not fall within the claim limitations, such as different chemical structures or alternative therapeutic approaches, they can avoid infringement.

Q4: What is the importance of the patent prosecution history in understanding scope?
A4: The prosecution history clarifies how claims were narrowed or amended during examination, aiding in interpreting the scope and strength of the patent’s protection.

Q5: How does the patent landscape influence a license or litigation strategy?
A5: Analyzing overlapping patents informs the likelihood of infringement, potential invalidity defenses, or licensing opportunities, shaping strategic decisions to maximize market protection or challenge competitors.


Sources:

  1. USPTO Public PAIR, Patent Document for US 10,639,309
    2.-filed patent applications and family info, PatentDB or equivalent patent database
  2. Relevant prior art references and patent classifications
  3. Legal and strategic analyses from patent law literature and industry reports

More… ↓

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Drugs Protected by US Patent 10,639,309

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 208246-002 Dec 12, 2019 RX Yes Yes 10,639,309*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 10,639,309

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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