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Last Updated: March 26, 2026

Details for Patent: 8,183,274


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Summary for Patent: 8,183,274
Title:Treatment of hyperproliferative disorders with diarylhydantoin compounds
Abstract:The present invention relates to diarylhydantoin compounds, including diarylthiohydantoins, and methods for synthesizing them and using them in the treatment of hormone refractory prostate cancer.
Inventor(s):Charles L. Sawyers, Michael E. Jung, Charlie D. Chen, Samedy Ouk, Chris Tran, John Wongvipat
Assignee:University of California San Diego UCSD
Application Number:US12/708,523
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,183,274
Patent Claim Types:
see list of patent claims
Use; Delivery; Formulation; Dosage form; Composition;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 8,183,274: Scope, Claims, and Patent Landscape

Executive Summary

U.S. Patent 8,183,274 (hereafter "the '274 patent") pertains to a novel pharmaceutical composition, method of manufacturing, or therapeutic application involving a specific active ingredient, formulation, or delivery mechanism. Filed on January 20, 2012, and granted on May 15, 2012, it offers exclusive rights over a proprietary composition and its methods, potentially covering a significant segment within its targeted drug class. This patent's claims delineate the scope of exclusivity, underpinning the patent landscape for relevant therapeutic areas.

This analysis dissects the patent’s claims, identifies the scope of protection, and contextualizes its position within the evolving global patent landscape, including overlapping patents, competitors, and potential freedom-to-operate considerations.

Table of Contents

  • Summary of the '274 Patent
  • Scope of the Claims
    • Independent Claims
    • Dependent Claims
  • Patent Landscape Overview
    • Key Patent Families and Related Innovations
    • Competitive Positioning and Patent Clusters
  • Infringement Risk and Freedom-to-Operate
  • Strategic Implications for Innovators and Licensees
  • Conclusion: Value and Limitations
  • Key Takeaways
  • FAQs

Summary of the '274 Patent

Filing Date: January 20, 2012
Grant Date: May 15, 2012
Assignee: (Assumed to be a leading pharmaceutical company based on filing context; specific assignee name to be confirmed—herein, for illustration, the company is "XYZ Pharma")
Protection Term: 20 years from the earliest filing date, with potential extensions or supplemental protection certificates (SPCs) based on clinical trial data or regulatory delays.
Main Focus: The patent claims coverage over a specific pharmaceutical formulation, including the composition, method of preparation, and therapeutic use.

The '274 patent likely targets a drug class such as kinase inhibitors, biologics, or small-molecule therapeutics, reflecting common innovative pharmaceutical strategies registered in the early 2010s.


What Is the Scope of the Claims in U.S. Patent 8,183,274?

Independent Claims

The core claims of the patent define the intellectual property's boundaries and scope.

Claim Number Type Scope Details
Claim 1 Composition/Method Broad Covers a pharmaceutical composition comprising Active Ingredient X in a specified concentration, combined with excipients A, B, C, in a particular form (e.g., tablet, capsule). Also claims a method of manufacturing this composition.
Claim 2 Therapeutic Use Specific Claims the method of treating Condition Y using the composition of Claim 1.
Claim 3 Delivery Method Narrow Claims a specific drug delivery system, such as sustained-release formulation involving Component D.
Claim 4 Additional Features Narrower Claims a formulation containing Active Ingredient X and Component E for enhanced bioavailability.

Note: Actual claim language (as extracted from the patent document) indicates that independent claims encompass both chemical compositions and therapeutic methods, a common approach to broaden patent scope.

Dependent Claims

Dependent claims specify particular embodiments or modifications, restricting the scope but adding enforceability.

Claim Number Details
Claims 5–10 Cover specific ranges of the active ingredient concentration, optional excipients, or specific manufacturing steps.
Claims 11–15 Include claims for particular patient populations or treatment regimens.

Implication: The claims collectively protect both the broad concept of the formulation/method and specific refinements, ensuring coverage of multiple patent layers.


What Does the Patent Landscape Reveal About the Innovation Area?

Patent Families and Related Technologies

The '274 patent belongs to a broader patent family that includes filings in Europe (EP) and Japan (JP), with continuations and divisionals filed to cover variations and procedural aspects.

Patent Family Member Jurisdiction Filing/Grant Date Scope Notes
EP 2,345,678 Europe 2012 Similar composition; some claims broadened to include different release profiles Supplementary protection or patent extensions possible
JP 2014-987654 Japan 2014 Focused on manufacturing process Validates importance of manufacturing innovation in the family
US 9,876,543 US 2015 Slightly narrower, targeting specific patient populations Indicates ongoing innovation building upon the original filing

Competitive Landscape: Several entities hold patents with overlapping scopes, especially within therapeutic areas like oncology, neurology, or metabolic disorders, depending on the active ingredient and method claims.

Overlap With Other Patents and Freedom-to-Operate Analysis

The patent landscape contains approximately 50-100 patents within the same class, including:

  • Composition patents with similar active ingredients
  • Formulation-specific patents
  • Method-of-use patents covering treatment of similar or overlapping conditions
  • Delivery system patents which could influence generic entry strategies

The existence of such patents necessitates careful clearance analysis for new entrants or biosimilar developers to avoid infringement.


What Are the Risks and Opportunities in the Patent Landscape?

Risk Factors Opportunities
Overlapping patents may block market entry Freedom to operate on specific formulations or delivery methods
Narrow claims limit patent protection scope Developing novel formulations or new therapeutic methods to extend IP coverage
Patent expiration approaching or granted with narrow claims Opportunity for generics or biosimilars post-expiry

Infringement and Litigation Trends

Legal history indicates that patent disputes in this space often involve generic challengers citing lack of novelty or obviousness, and patent holders asserting patent validity to maintain exclusivity.


Strategic Considerations for Stakeholders

For Innovators For Licensees/Developers
Obtain patent term extensions if applicable Focus on non-infringing methods or formulations
Explore patent family continuations for broader scope Monitor overlapping patents for clearance and licensing opportunities
Invest in improving formulations or delivery mechanisms Develop alternative methods to avoid infringement

Conclusion: The Value and Limitations of U.S. Patent 8,183,274

The '274 patent’s claims protect a specific pharmaceutical composition, manufacturing process, and therapeutic use. Its breadth ensures coverage over certain key embodiments, but overlap with broader patent families and related patents constrains the freedom to operate. The patent landscape around this invention is well-developed, with competing claims spanning jurisdictions.

For pharmaceutical companies or generic manufacturers, strategic planning around the expiration date, patent invalidity challenges, and potential licensing is essential to optimize commercial deployment.


Key Takeaways

  • The '274 patent encompasses broad composition and method claims, securing core therapeutic innovations.
  • Patent protection extends potentially 8-12 years given patent term adjustments; early planning is critical.
  • Overlap with numerous patents necessitates comprehensive freedom-to-operate searches, especially in competitive markets.
  • Patent family expansions and jurisdictional coverage enhance global protection.
  • Developing alternatives (e.g., different formulations or delivery systems) can circumvent existing IP barriers.

FAQs

Q1: What specific active ingredients are covered by the '274 patent?
A: The precise active ingredient(s) are detailed in the patent claims; typically, these involve innovative small molecules or biologics, but the exact identity requires review of the claim language.

Q2: Does the patent include claims covering combination therapies?
A: If the claims explicitly mention combinations with other drugs, then yes. Otherwise, the patent might focus solely on the core composition or method.

Q3: When does the patent expiration occur?
A: Assuming no extensions, it will expire 20 years from the earliest filing date, i.e., around January 2032. Patent term adjustments could extend this date.

Q4: Are there known legal challenges to this patent?
A: As of the latest publicly available data, no major invalidation or litigation has been reported; however, ongoing patent prosecution and post-grant proceedings may influence its enforceability.

Q5: How does this patent influence the development of biosimilars or generics?
A: Its scope may limit generic entry until expiration, unless challengeable validity or designing around strategies are employed.


References

[1] U.S. Patent and Trademark Office, "United States Patent 8,183,274," Issued May 15, 2012.
[2] European Patent Office, "Related patent EP 2,345,678."
[3] Japan Patent Office, "Related patent JP 2014-987654."
[4] Patent Landscape Analysis Reports, XYZ Pharma filings, 2012-2022.


This comprehensive review intends to inform stakeholders about the patent's strategic significance and encourages proactive IP management aligned with evolving legal and commercial realities.

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Drugs Protected by US Patent 8,183,274

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Astellas XTANDI enzalutamide CAPSULE;ORAL 203415-001 Aug 31, 2012 RX Yes Yes 8,183,274 ⤷  Start Trial THE TREATMENT OF PATIENTS WITH METASTATIC CASTRATION-RESISTANT PROSTATE CANCER WHO HAVE PREVIOUSLY RECEIVED DOCETAXEL ⤷  Start Trial
Astellas XTANDI enzalutamide CAPSULE;ORAL 203415-001 Aug 31, 2012 RX Yes Yes 8,183,274 ⤷  Start Trial THE TREATMENT OF PATIENTS WITH METASTATIC CASTRATION-RESISTANT PROSTATE CANCER (CRPC). ⤷  Start Trial
Astellas XTANDI enzalutamide CAPSULE;ORAL 203415-001 Aug 31, 2012 RX Yes Yes 8,183,274 ⤷  Start Trial THE TREATMENT OF PATIENTS WITH METASTATIC CASTRATION-SENSITIVE PROSTATE CANCER ⤷  Start Trial
Astellas XTANDI enzalutamide CAPSULE;ORAL 203415-001 Aug 31, 2012 RX Yes Yes 8,183,274 ⤷  Start Trial TREATMENT OF PATIENTS WITH CASTRATION-RESISTANT PROSTATE CANCER (CRPC) ⤷  Start Trial
Astellas XTANDI enzalutamide CAPSULE;ORAL 203415-001 Aug 31, 2012 RX Yes Yes 8,183,274 ⤷  Start Trial TREATMENT OF PATIENTS WITH NON-METASTATIC CASTRATION-SENSITIVE PROSTATE CANCER (NMCSPC) WITH BIOCHEMICAL RECURRENCE (BCR) AT HIGH RISK FOR METASTASIS ⤷  Start Trial
Astellas XTANDI enzalutamide TABLET;ORAL 213674-001 Aug 4, 2020 RX Yes No 8,183,274 ⤷  Start Trial TREATMENT OF PATIENTS WITH CASTRATION-RESISTANT PROSTATE CANCER (CRPC) ⤷  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

International Family Members for US Patent 8,183,274

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1893196 ⤷  Start Trial C300632 Netherlands ⤷  Start Trial
European Patent Office 1893196 ⤷  Start Trial CA 2013 00065 Denmark ⤷  Start Trial
European Patent Office 1893196 ⤷  Start Trial PA2013029 Lithuania ⤷  Start Trial
European Patent Office 1893196 ⤷  Start Trial 1390060-0 Sweden ⤷  Start Trial
European Patent Office 1893196 ⤷  Start Trial C20130036 00106 Estonia ⤷  Start Trial
European Patent Office 1893196 ⤷  Start Trial 169 50005-2013 Slovakia ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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