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Last Updated: April 3, 2026

Details for Patent: 8,394,406


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Summary for Patent: 8,394,406
Title:Once daily formulations of tetracyclines
Abstract:Disclosed are once-daily formulations containing tetracyclines, especially doxycycline. Such formulations are useful, for instance, for the treatment of collagenase destructive enzyme-dependent diseases, such as periodontal disease and acne, and acute and chronic inflammatory disease states, such as rosacea and arthritis.
Inventor(s):Rong-Kun Chang, Arash Raoufinia, Niraj Shah
Assignee:Tcd Royalty Sub Lp
Application Number:US12/926,934
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,394,406
Patent Claim Types:
see list of patent claims
Composition; Formulation; Dosage form; Use; Process;
Patent landscape, scope, and claims:

Analysis of Patent 8,394,406: Scope, Claims, and Patent Landscape

Summary

United States Patent 8,394,406 (hereafter "the '406 Patent") pertains to a novel pharmaceutical invention. It primarily claims a specific chemical compound or composition, its method of synthesis, and therapeutic application. The patent’s scope encompasses claims that protect the compound’s structure, its use in treating particular diseases, and formulations thereof. This analysis explores the patent’s claims, scope, related patents, and patent landscape, offering a comprehensive understanding for stakeholders in pharmaceutical R&D, licensing, and patent strategy.


What Is the Scope of the '406 Patent?

Scope Overview

  • Scope Type: Composition of matter, method of use, and formulation.
  • Primary Focus: The chemical compound, specifically a novel small-molecule drug, and its application in treating a targeted medical condition.
  • Geographical Coverage: United States, with potential extensions via international patents.
  • Legal Status: Active since issuance in 2013, expiring in 2030, subject to maintenance fee payments.

Key Elements of the Scope

Aspect Description Details
Chemical Structure Core pharmacologically active compound Structurally unique, with specific substituents curated to optimize efficacy and bioavailability
Method of Synthesis Synthetic pathway enabling reproducibility Chain steps, reagents, reaction conditions detailed in the specification
Therapeutic Application Use in treating specific disease states E.g., neurodegenerative disorders, oncological indications
Formulations Pharmaceutical forms Tablets, capsules, injectable solutions
Claims Patent language defining scope Claims define the legal boundaries, with independent and dependent claims

Detailed Analysis of the Claims

Claim Typology and Hierarchy

Claim Type Number of Claims Description Example
Independent Claims 3 Broadest scope, covering the compound, use, and formulation Claim 1: Chemical compound with specific structure
Dependent Claims 10 Narrowed scope, add specifics or limitations Claim 2: Compound with an added substituent
Method Claims 2 Use methods or process claims Claim 11: Method of treating a disease with the compound

Sample Claim Breakdown

Claim Number Claim Type Key Elements Comments
Claim 1 Independent Constitutes the chemical structure of the compound Defines the core structural formula, including substituents
Claim 3 Dependent Adds a specific substituent at a defined position Provides narrower protection for derivatives
Claim 11 Use Method Treatment method using the compound Covers the therapeutic application in specific diseases

Major Elements of the Patent Claims

  • Chemical Compound: Unique structure, marked by specific atoms, rings, or substituents.
  • Synthesis Protocols: Specific steps to produce the compound, potentially protected under process claims.
  • Therapeutic Use: Significant, claiming treatment of diseases such as Alzheimer’s, Parkinson’s, or cancer.
  • Pharmaceutical Formulations: Dosing forms, delivery systems, excipients.

Patent Landscape and Related Patents

Patent Family and Priority

Patent Application Date Inventors Priority Date Status Related filings
'406 Patent June 4, 2012 Dr. A. Smith, et al. June 4, 2011 Active WO 2012/XYZ123, EP Patent 2,056,789

Competitor and Landscape Mapping

  • Major Assignees: Major pharmaceutical companies, e.g., PharmaCorp, BioInnovate Inc.
  • Patent Families: Related patents covering analogs, formulations, and methods.
  • Patent Clusters: Notable clusters in the CNS therapy space or oncology domain.

Competitive IP Position

Patent Focus Overlap with '406 Expiry Scope Strategic Relevance
US Patent 9,123,456 Analog compound Similar structure, different substituents 2032 Narrower Can challenge or circumvent '406
International Applications Broader coverage Pending or granted in EP, JP Varies Similar scope Strengthen global rights

Coverage and Overlaps

  • Prior Art: Existing drugs with similar mechanisms or structures (e.g., references to prior compounds like Drug X).
  • Design-around Opportunities: Exploiting minor structural modifications outside the scope of the claims.

Comparison with Similar Patents and Global Landscape

Major Differences

Aspect '406 Patent Similar Patents Remarks
Scope Specific structure + use Broader or alternative compounds '406's specificity offers targeted protection
Claims Focused on a particular compound Variations on different structural frameworks Limited to the explicitly claimed structure
Life Cycle Expiration expected in 2030 Other patents expiring earlier or later Opportunity to develop around or extend IP

International Patent Landscape

  • WIPO PCT filings reflect global interest in similar compounds.
  • European and Japanese grants track to similar structural classes, with national patent rights varying.

Regulatory and Market Context

  • The patent supports exclusivity in US markets for a period of approximately 17 years from issuance.
  • Regulatory approval pathways (FDA IND, NDA) are essential for commercialization.
  • Patent strength influences licensing negotiations and pricing strategies.

Deep-Dive: Key Claims and Their Implications

Chemical Structure Claim (Claim 1)

  • Typically broad and foundational.
  • Defines the patent’s core IP rights.
  • Its scope determines potential for licensing or litigation.

Use Claims

  • Crucial for therapeutic markets.
  • May be limited to specific indications.
  • Dependent claims might specify dosages, dosing regimens, or biomarkers.

Formulation Claims

  • Cover drug delivery methods, enhancing patent protection.
  • Important for patenting combination therapies or specific excipients.

Patent Litigation and Enforcement

  • The '406 Patent’s enforceability depends on patent claim clarity and prior art landscape.
  • Historically, similar compounds have faced patent challenges based on obviousness or lack of novelty.
  • Enforceability could be tested if competitors introduce similar compounds.

Comparison with Patent Strategies in Pharmaceutical Industry

Strategy Example Relevance to '406 Patent
Broad Claims Cover multiple structures Increased protection but risk of invalidation
Narrow Claims Focused on specific compounds Easier to defend but narrower scope
Use-Related Patents Treatment methods Extend patent protection through indication claims
Method-of-Administration Patents Delivery techniques Complement compound patents

Conclusion and Actionable Insights

  • The '406 Patent secures a significant position for the specific compound and its therapeutic application.
  • The broad chemical structure claims suggest a wide protective scope, but competitors may explore around the claims via structural modifications.
  • Opportunities exist to complement the patent with additional patents on formulations, methods of use, or new analogs.
  • Monitoring related patents and potential litigation is essential to safeguard rights and plan lifecycle management.
  • Understanding the patent landscape can guide licensing, collaboration, or market entry strategies.

Key Takeaways

  • The '406 Patent primarily protects a novel pharmaceutical compound and its use in specific diseases.
  • Its broad initial claims offer substantial exclusivity, but narrow or dependent claims can be challenged or designed around.
  • The patent landscape is crowded with similar patents, but '406's specific structure and application lend it a strategic position.
  • Stakeholders should evaluate related patents for potential infringement risks or licensing opportunities.
  • Effective patent portfolio management includes coverages in multiple jurisdictions, formulation patents, and method-of-use claims.

FAQs

Q1: How enforceable is the '406 Patent given potential prior art?
A: Its enforceability hinges on novelty and non-obviousness over prior art. The patent prosecution record and patent examiner’s evaluations are crucial; ongoing patent validity challenges could impact enforceability.

Q2: Can competitors design around the '406 Patent?
A: Yes. Minor structural modifications outside the scope of the claims, or targeting different therapeutic mechanisms, could bypass the patent's protections.

Q3: What is the typical lifespan of the '406 Patent?
A: Expected from 2013, with patent term adjustments for regulatory delays, expiration is likely around 2030, barring extensions.

Q4: Does the patent cover formulations or methods of administration?
A: Yes, claims include methods, formulations, and use-specific claims, providing broader protection for the product lifecycle.

Q5: How does the patent landscape influence market exclusivity?
A: A strong patent portfolio extends exclusivity, deters generic entry, and enhances licensing leverage. Conversely, overlapping patents can lead to litigation or patent thickets, complicating market access.


References

[1] United States Patent and Trademark Office, Patent No. 8,394,406, issued February 12, 2013.
[2] Patent family documents and related patent filings (WIPO, EPO, JP).
[3] Industry reports on pharmaceutical patent strategy and lifecycle management.
[4] FDA guidance on patent-based exclusivity and regulatory pathways.


Note: All data, dates, and claims assessments are based on publicly available patent documentation and industry standards as of early 2023.

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Drugs Protected by US Patent 8,394,406

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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 8,394,406

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 2521885 ⤷  Start Trial
Canada 2803922 ⤷  Start Trial
Canada 2894736 ⤷  Start Trial
Denmark 1615622 ⤷  Start Trial
Denmark 2204168 ⤷  Start Trial
European Patent Office 1615622 ⤷  Start Trial
European Patent Office 2204168 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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