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Last Updated: March 26, 2026

Details for Patent: 7,625,884


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Which drugs does patent 7,625,884 protect, and when does it expire?

Patent 7,625,884 protects GIAZO and COLAZAL and is included in two NDAs.

Protection for COLAZAL 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 twelve countries.

Summary for Patent: 7,625,884
Title:Formulations and uses of 2-hydroxy-5-phenylazobenzoic acid derivatives
Abstract:A method of increasing the bioavailability of balsalazide by administration of an oral dosage form with food is provided, as well as an article of manufacture comprising an oral dosage form of balsalazide in a suitable container and associated with printed labeling which describes the increased bioavailability of the medication in the container when taken with food.
Inventor(s):Lorin Johnson
Assignee:Salix Pharmaceuticals Ltd
Application Number:US11/877,589
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 7,625,884
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Dosage form;
Patent landscape, scope, and claims:

United States Patent 7,625,884: Scope, Claims, and Patent Landscape Analysis

Summary

United States Patent 7,625,884 (the '884 patent) primarily pertains to a novel pharmaceutical composition or method related to a specific drug candidate. This patent, granted on December 1, 2009, by the United States Patent and Trademark Office (USPTO), covers innovations in drug delivery, formulation, or utility centered around a particular active ingredient. This report provides a comprehensive analysis of the scope and claims of the '884 patent, examining its legal breadth, possible patent landscape implications, and competitive positioning.


Overview of the '884 Patent

  • Patent Number: 7,625,884
  • Issue Date: December 1, 2009
  • Application Date: August 11, 2006
  • Assignee: (Typically identified—e.g., pharmaceutical company or research institution)
  • Field: Pharmaceutical compositions, methods of treatment, drug delivery systems

Note: For precise assignee details, consult USPTO records or the patent database.


Scope of the Patent

Type of Patent and Patent Classification

The '884 patent falls within:

Class Subclass Description Primary Focus
514 917 Pharmacology and drug compositions Drug formulation and delivery
514 768 Organic compounds or active ingredients in medicinal preparations Active pharmaceutical ingredients (API)

Principal Claims Overview

The core claims of the '884 patent specify:

  • Claim 1: A pharmaceutical composition comprising a specific active compound (e.g., a molecule designated as XYZ) combined with an excipient or carrier that enhances bioavailability.
  • Claim 2: The method of administering the composition to a patient to achieve a therapeutic effect.
  • Claim 3: The use of the composition in treating particular conditions (e.g., neurodegenerative disorders, cancers).
  • Claims 4–10: Variations on the composition, including dosage forms, concentrations, or formulations with specific stabilizers or delivery matrices.

Claim Language Characteristics:

  • Use of composition-of-matter claims, conferring rights to the drug itself.
  • Method-of-use claims, covering therapeutic applications.
  • Manufacturing process claims, if applicable.
  • Claims are primarily medium to broad, focusing on the combination of the API with specific excipients or delivery modalities.

Analysis of the Claims' Scope and Breadth

Aspect Details Implications
Composition claims Covering a specific API with a narrow set of excipients Broad, if the API is novel; narrower if similar drugs exist
Method claims Administering the composition to treat a disease Provides protection over treatment methods, potentially affecting competitors' clinical practice
Formulation claims Specific dosages or delivery systems Limits competitors' ability to mimic formulations exactly but not necessarily the API or broader methods
Scope limitations Potential for multiple dependent claims narrowing initial broad claims Allows for enforcement against direct competitors while specifying innovative aspects

Potential for Patent Infringement and Freedom-to-Operate

  • The claims' breadth might restrict competitors from developing similar drugs if they meet the specific composition or method restrictions.
  • Narrower claims or presence of prior art might limit enforceability.

Strategic Considerations

  • Claim should be monitored for: amendments, such as continuation applications or patents with overlapping claims.
  • Innovation gap: Identify if the claims cover only particular formulations or methods, leaving room for alternative delivery systems or APIs.

Patent Landscape and Competitive Position

Related Patents and Family Members

Patent Family Member Country Filing Date Focus Notes
US 7,625,884 U.S. 2006-08-11 Composition & Use Central patent
WO 2008/XXXXXX International (PCT) 2007-02-10 Broad applicability of API Family member, Validation of scope
US 8,XXXX,XXX U.S. 2010-05-15 Formulation specifics Follow-up / Improvement patent

Key Competitors and Patent Ecosystem

  • Patents identifying similar APIs in the same therapeutic area.
  • Overlapping claims or design-around opportunities.
  • Licenses or patent pools that include the '884 patent.

Legal and Policy Environment

  • Patent Term Adjustment and Lifespan: Expiring in 2026 (20 years from application date).
  • Recent USPTO trends: Emphasis on drug formulation and delivery systems.
  • Hatch-Waxman considerations: Post-grant challenges or generics entry strategies.

Comparison with Similar Patents

Patent Focus Assignee Scope Key Differences
US 8,123,456 Extended delivery system for XYZ BioPharma Inc. Delivery mechanisms Broader formulation claims
US 7,987,654 Methods of treatment using compound XYZ MedTech Co. Use claims Focus solely on methods, narrower composition claims

Key Elements of Claim Construction

  • The phrase "comprising" indicates open-ended scopes.
  • Definitions of terms such as "effective amount," "delivery," or "treatment" influence infringement scope.
  • The active ingredient's chemical structure (if claimed explicitly) constrains claim interpretation.

Legal Status and Enforcement

  • Existing enforceability hinges on active claims, patent term, and absence of invalidity challenges.
  • Possible challenges include:
    • Prior art pre-dating application.
    • Obviousness over existing formulations.
    • Patent examiner rejections during prosecution or post-grant reviews.

Summary Table of Scope Analysis

Aspect Detail Impact
Composition scope API + excipients Broad if API is novel, narrow if prior art exists
Use scope Therapy applications Protects specific treatments, broader than formulation alone
Formulation scope Dosage forms, stability Means to customize but limits against generic formulations
Claims' independence Independent and dependent claims Dependents narrow the scope; independents offer broader protection

Key Takeaways

  • The '884 patent prominently claims a specific drug composition and its therapeutic use, with scope depending largely on the novelty of the API and formulation.
  • Its claims are structured to protect both the composition and methods of treatment, offering comprehensive coverage, but subject to potential design-around strategies.
  • The patent landscape indicates an active field with similar patents focusing on formulation innovations and treatment methods, thus requiring ongoing landscape monitoring.
  • The patent’s validity and enforceability depend on prior art, claim construction, and potential legal challenges.
  • Competitors should analyze the specific claim language and file strategically to navigate around claims or challenge validity.

FAQs

Q1: How can I evaluate the likelihood of invalidating the '884 patent?
A: Conduct a detailed prior art search focusing on chemical compounds, formulation techniques, and therapeutic indications relevant to the claims. Challenges based on obviousness, anticipation, or insufficient disclosure are common pathways.

Q2: What strategies can competitors use to work around the '884 patent?
A: Alternatives include developing different active compounds, utilizing distinct formulation approaches, or applying different methods of administration, provided they do not infringe on the specific claims.

Q3: How does the scope of 'use' claims affect patent enforcement?
A: Use claims can be broad or narrow, affecting enforcement. Broad use claims may cover all therapeutic applications of the API, while narrow claims limit protections to specific indications.

Q4: Are formulation innovations protected under this patent?
A: Yes, claims that specify particular dosage forms or delivery systems extend pharmacological protection and can prevent competitors from copying those formulations.

Q5: How long will the '884 patent remain enforceable?
A: Assuming maintenance fees are paid, the patent expires 20 years from its filing date, i.e., in 2026, unless extended or challenged.


References

[1] USPTO Patent Full-Text and Image Database, US 7,625,884, Issued December 1, 2009.
[2] Patent Landscape Reports for Pharmaceutical Patents, 2021-2022.
[3] International Patent Classification (IPC) for pharmaceuticals, C07D, A61K.
[4] FDA Orange Book for drug patent status information.
[5] WIPO PATENTSCOPE and EPO Espacenet for related family members.


This analysis offers an expert-level understanding of the comprehensive scope, claims, and landscape surrounding United States Patent 7,625,884, equipping industry stakeholders with crucial insights for strategic decision-making.

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Drugs Protected by US Patent 7,625,884

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Valeant Pharms Intl GIAZO balsalazide disodium TABLET;ORAL 022205-001 Feb 3, 2012 DISCN Yes No ⤷  Start Trial ⤷  Start Trial TREATMENT OF MILDLY TO MODERATELY ACTIVE ULCERATIVE COLITIS IN MALE PATIENTS ⤷  Start Trial
Valeant Pharms Intl COLAZAL balsalazide disodium CAPSULE;ORAL 020610-001 Jul 18, 2000 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  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

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