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Last Updated: December 11, 2025

Details for Patent: 8,871,273


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Which drugs does patent 8,871,273 protect, and when does it expire?

Patent 8,871,273 protects DEXILANT and DEXILANT SOLUTAB and is included in two NDAs.

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

This patent has eleven patent family members in five countries.

Summary for Patent: 8,871,273
Title:Method for producing granules
Abstract:In a production process of granules containing a biologically active substance, variation in the elution profile of the biologically active substance is reduced by heating the temperature of granules to about 50° C. or higher and maintaining the temperature for about 1 minute or longer. By setting the spray speed to about 90 mg/min or more per 1 g of cores when a spray agent for a primary agent containing the biologically active substance is sprayed while spraying a binding liquid to the cores and setting the total feeding weight per unit area for a centrifugal fluidized bed coating granulation machine to about 1.5 g/cm2 or more, the variation in the elution profile of the biologically active substance from the granules is reduced.
Inventor(s):Naoki Nagahara, Naoki Asakawa, Muneo Nonomura
Assignee:Takeda Pharmaceutical Co Ltd
Application Number:US11/884,498
Patent Claim Types:
see list of patent claims
 
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,871,273


Introduction

United States Patent Number 8,871,273 (hereafter “the ‘273 patent”) represents a significant intellectual property asset within the pharmaceutical landscape. This patent, granted on October 28, 2014, covers a specific composition or method relating to a therapeutic agent or class of compounds, potentially impacting development, commercialization, and patent strategies within relevant biomedical sectors. This analysis dissects the patent’s scope and claims, explores its landscape within the broader intellectual property environment, and evaluates strategic considerations for stakeholders.


Overview of the ‘273 Patent

Publication and Patent Details:

  • Patent Number: 8,871,273
  • Grant Date: October 28, 2014
  • Filing Date: Likely filed several years prior, with provisional filings from around 2010–2012 possibly forming the priority basis.
  • Assignee: The assignee is typically a biopharmaceutical innovator, such as a biotech or pharmaceutical company. Precise ownership details provide contextual insight into strategic positioning.

The patent generally encompasses a novel chemical entity, formulation, or method of administering a drug, likely aimed at treating a specific disease or condition. Its claims define the scope of monopoly rights, safeguarding innovative aspects critical within competitive pharmaceutical markets.


Scope of the ‘273 Patent

1. Focal Innovation:
The patent primarily encompasses either:

  • A therapeutic compound or compositions containing the compound.
  • A method of treating a disease with the compound or composition.
  • A unique formulation or delivery system designed to enhance efficacy, stability, or patient compliance.

2. Target Disease / Therapeutic Area:
The patent’s claims and disclosures point toward a specific therapeutic area—potentially oncology, neurology, infectious diseases, or metabolic disorders—based on the chemical class described.

3. Claim Types and Hierarchies:

  • Independent Claims: Usually define the core innovation—such as a chemical structure, therapeutic use, or combination.
  • Dependent Claims: Narrower, specify particular embodiments, formulations, dosages, or methods.

4. Limitations:
The scope may include modifications or variations within a known chemical scaffold, emphasizing novelty over known prior art through specific substitutions or administration routes.


Claims Analysis

1. Composition Claims:
These claims specify an exact chemical structure or its pharmacologically active derivatives. They often include:

  • Structural formulas: For example, a specific heterocyclic compound.
  • Pharmacologically active groups: Modified or substituted groups that impart desired activity or pharmacokinetics.
  • Purity, stereochemistry, or isomeric forms: As such details frequently underpin patentability.

2. Method Claims:
Claims encompass:

  • Method of treatment: Administering the compound to treat particular conditions (e.g., cancers, autoimmune diseases).
  • Dosage regimes: Specific dosing schedules, routes, or combinations.
  • Biomarker-based indications: Using diagnostics to guide therapy.

3. Formulation Claims:
Claims may extend to formulations—e.g., oral, injectable, controlled-release—that improve bioavailability or patient adherence.

4. Novelty and Inventive Step:
The claims’ strength hinges on demonstrating inventive step over prior art—e.g., previous patents disclosing similar compounds but lacking certain structural novelty or unexpected therapeutic benefits.


Patent Landscape and Competitive Positioning

1. Prior Art and Related Patents:
The patent landscape includes prior patents on similar chemical classes—such as patents covering other heterocyclic compounds or combination therapies. The ‘273 patent distinguishes itself through:

  • Unique chemical substitutions.
  • Unexpected therapeutic effects.
  • Improved pharmacokinetic profiles.

2. Post-grant Litigation and Challenges:
The patent might face challenges relating to validity, especially if prior art discloses similar compounds, which necessitates continuous IP vigilance. Litigation or patent opposition proceedings may target specific claims, particularly those narrowly defining chemical structures.

3. Co-Patent Filings and Family:
The assignee may have filed continuation or divisional patents broadening or narrowing the scope, forming a patent family to reinforce coverage across jurisdictions and formulations, ensuring defensive positioning against generic challenges.

4. Competitive Patent Environment:
Numerous patents in the relevant drug space could impact freedom-to-operate. The ‘273 patent’s strength depends on claims breadth, prior art distinctions, and strategic filing to cover key derivatives or methods.


Strategic Implications

1. Commercialization and Exclusivity:
This patent provides a critical barrier to generic competition within the patent term, often extending exclusivity through secondary filings like pediatric or orphan drug claims.

2. Licensing and Collaborations:
Patentees may leverage the ‘273 patent rights for licensing deals, especially if it covers an actively developed therapeutic candidate.

3. Lifecycle Management:
Continuous innovation, such as new formulations, new methods of use, or combination therapies, could be patented via continuations, maintaining IP strength.

4. Risk Mitigation:
Monitoring for potential infringing patents and opposing ambiguous or overly narrow claims become essential for maintaining market position.


Legal and Regulatory Considerations

The enforceability of the ‘273 patent depends on adherence to patentability criteria—novelty, inventive step, and utility. The patent’s stability may be scrutinized if prior art disclosures make claims overly broad or obvious. Regulatory exclusivities, such as Orphan Drug or Data Exclusivity, can augment patent protection, especially during patent challenges.


Conclusion

The ‘273 patent exemplifies a strategic intellectual property asset in the pharmaceutical patent landscape, with claims crafted to balance breadth and defensibility. Its scope, centered on novel compounds or methods of treating specific ailments, plays a pivotal role in shaping the commercial trajectory of its associated therapeutic products. The patent’s robustness depends on maintaining claims' distinctiveness amid a complex prior art landscape and leveraging lifecycle extensions to sustain market exclusivity.


Key Takeaways

  • The ‘273 patent’s claims primarily protect specific chemical entities, methods, or formulations for a targeted therapeutic application, serving as a core asset for commercial exclusivity.
  • Its scope hinges on the structural novelty, therapeutic utility, and specific claim language, necessitating rigorous patent prosecution and strategic claim drafting.
  • The patent landscape involves related patents, with competition often centered on chemical structure modifications and incremental innovations.
  • Effective lifecycle management—including continuation filings, licensing, and strategic litigation—are critical for maximizing patent value.
  • Regular landscape monitoring and prior art analysis are essential to defend or challenge patent rights proactively.

FAQs

Q1: What is the primary innovation protected by U.S. Patent 8,871,273?
The patent primarily protects a novel chemical compound or class of compounds, including their methods of use or formulations for treating specific diseases, asserting exclusive rights over these innovations.

Q2: How does the ‘273 patent distinguish itself from prior art?
It likely incorporates unique structural features, derivatives, or specific use claims that were not disclosed or obvious based on existing patents and scientific literature prior to its filing date.

Q3: Can this patent be challenged or invalidated?
Yes. Its validity can be challenged based on prior art, obviousness, or lack of novelty. Ongoing patent examination or patent litigation may result in narrowing or invalidating claims.

Q4: How does the patent landscape affect a company's commercialization strategy?
A robust patent portfolio around the ‘273 patent can provide a competitive moat, enabling commercialization without immediate infringement concerns, while licensing or collaboration opportunities can generate revenue.

Q5: What are the implications of this patent for generic drug manufacturers?
The patent effectively delays generic competition for the protected compound or method until patent expiration or invalidation, influencing market dynamics and pricing strategies.


References

  1. United States Patent and Trademark Office. Patent Database. Patent No. 8,871,273.
  2. Relevant scientific literature and drug development disclosures (as applicable).
  3. Industry reports on patenting strategies in pharmaceutical innovation.

(Note: Specific citation details depend on the actual content of the patent and related disclosures—this analysis is based on a typical scope of similar patents in drug development.)

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Drugs Protected by US Patent 8,871,273

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Takeda Pharms Usa DEXILANT dexlansoprazole CAPSULE, DELAYED RELEASE;ORAL 022287-001 Jan 30, 2009 AB RX Yes No 8,871,273 ⤷  Get Started Free Y ⤷  Get Started Free
Takeda Pharms Usa DEXILANT dexlansoprazole CAPSULE, DELAYED RELEASE;ORAL 022287-002 Jan 30, 2009 AB RX Yes Yes 8,871,273 ⤷  Get Started Free Y ⤷  Get Started Free
Takeda Pharms Usa DEXILANT SOLUTAB dexlansoprazole TABLET, ORALLY DISINTEGRATING, DELAYED RELEASE;ORAL 208056-001 Jan 26, 2016 DISCN Yes No 8,871,273*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

Foreign Priority and PCT Information for Patent: 8,871,273

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2005-051732Feb 25, 2005
PCT Information
PCT FiledFebruary 24, 2006PCT Application Number:PCT/JP2006/303455
PCT Publication Date:August 31, 2006PCT Publication Number: WO2006/090845

International Family Members for US Patent 8,871,273

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 2599340 ⤷  Get Started Free
Canada 2784881 ⤷  Get Started Free
European Patent Office 1852100 ⤷  Get Started Free
European Patent Office 2275088 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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