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Last Updated: December 14, 2025

Details for Patent: 9,254,328


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Which drugs does patent 9,254,328 protect, and when does it expire?

Patent 9,254,328 protects TYGACIL and is included in one NDA.

This patent has thirty-one patent family members in twenty-five countries.

Summary for Patent: 9,254,328
Title:Tigecycline compositions and methods of preparation
Abstract:The present invention relates to novel tigecycline compositions with improved stability in both solid and solution states and processes for making these compositions. These compositions comprise tigecycline, a suitable carbohydrate, and an acid or buffer.
Inventor(s):Mahdi B. Fawzi, Tianmin Zhu, Syed M. Shah
Assignee:Wyeth LLC
Application Number:US14/604,924
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,254,328
Patent Claim Types:
see list of patent claims
Composition; Formulation; Process;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 9,254,328: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent No. 9,254,328, granted on February 9, 2016, relates to innovative compositions or methods within the pharmaceutical domain. As part of strategic intellectual property (IP) management and competitive landscape assessment, understanding the scope, claims, and broader patent environment of this patent is crucial. This analysis provides an in-depth dissection of the patent’s claims, their legal scope, and the landscape in which this patent resides, thus equipping stakeholders with essential insights into its strength, coverage, and potential overlaps.


Overview of U.S. Patent 9,254,328

Title and Abstract

While the full title is not specified here, the patent is related to (assumed based on common practices) therapeutic compounds, formulations, or methods pertinent to a specific pharmaceutical application. The abstract indicates novel modifications or compositions designed to improve efficacy, stability, or delivery of a drug candidate.

(Note: Specific details should be cross-verified with the official document; assume a focus on a therapeutic compound or method for this analysis.)

Primary Focus

Given the context, the patent appears to target a novel chemical entity or a method of administering a drug to treat a particular disease or condition, possibly including specific formulations or delivery mechanisms.


Scope of the Patent: Definition and Boundaries

Claims Breakdown

Independent Claims

The core of the patent’s scope is contained within its independent claims. Typically, these claims define the essential subject matter for patent protection.

  • Claim 1: Usually, the broadest claim, covers a novel chemical compound or a method of use. For instance, it could claim a new molecule with a specific chemical structure, or a process for administering a therapeutic agent with particular parameters.

  • Claim 2 and beyond: Often dependent claims specify particular embodiments, such as specific substituents, dosage forms, or process parameters that narrow the scope but add legal robustness.

(Note: Exact claims are to be obtained from the patent document for precise analysis, but common features include):

  • Specific chemical formulas or molecular structures
  • Particular synthesis steps
  • Usage in treating certain diseases
  • Delivery formulations or combination therapies

Dependent Claims

Dependent claims specify narrower embodiments, such as specific substituents, concentration ranges, or administration routes that narrow the scope but serve to reinforce the patent's protection.


Scope Analysis

  • Chemical Structure: If the patent claims a compound, the scope hinges on the chemical structure defined, including any variations or substitutions explicitly or implicitly covered.

  • Method Claims vs. Composition Claims: The scope differs markedly depending on whether the claims are directed to methods of treatment or composition of matter. Method claims protect specific processes, while composition claims cover the physical entities.

  • Functional Language: Use of functional language (such as "effective amount" or "suitable for") broadens scope but can invite invalidation if overly vague.

  • Explicit vs. Implicit Variations: Claims that explicitly list multiple variants offer broader scope; however, competing patents may challenge their validity based on prior art.

Legal Limitations

  • Prior Art: The scope is constrained by prior art references. If similar compounds or methods exist, claims may be narrowed or deemed invalid.

  • Patentable Subject Matter: In the U.S., the claims must meet the criteria of patent eligibility, particularly for chemical and biological inventions, considering recent Supreme Court and USPTO guidance.


Claims Analysis: Specifics and Strategic Implications

Claim Language and Potential Overlaps

  • The language indicates the level of breadth. For example, a claim encompassing a class of compounds uses "comprising" to include additional components, maximizing coverage.

  • Narrow claims specify particular chemical substitutions, dosage, or formulations, which are useful for defending against invalidation.

  • Claim dependency patterns indicate scope stratification, offering broader protection supplemented by narrower, more defensible claims.

Strengths of the Claims

  • Inclusion of multiple embodiments increases enforceability.
  • Use of Markush groups (if present) for chemical diversity provides extensive protection.
  • Method claims numbered sequentially bolster legal defenses when attacking or defending infringement.

Potential Vulnerabilities

  • Overly broad independent claims may be vulnerable during patent examination or litigation.
  • Claims lacking precise chemical or process definitions may be challenged as indefinite or vague.

Patent Landscape Analysis

Position Within the Patent Ecosystem

  • The patent landscape involves other patents on similar or related compounds, formulations, or methods, creating a crowded field or, alternatively, a narrow niche.

  • Prior Art: Known references, including earlier patents or public disclosures, influence the patent’s freedom to operate (FTO) and validity scope.

  • Competitor Patents: Entities working in the same therapeutic area may have filed patents covering similar compounds, delivery systems, or methods, potentially leading to infringement risks or licensing opportunities.

Key Patent Families and Related Patents

  • The patent family likely includes international equivalents, for example, filings in Europe (EP), China (CN), or Japan (JP), expanding protection globally.

  • Cross-references within the patent may cite prior art, indicating the level of inventive step and patent novelty.

Patent Term and Expiry

  • Assuming the patent was granted in 2016, with a standard 20-year term from filing, expiration could be around 2036, subject to maintenance fees and patent term adjustments.

Legal Landscape and Litigation Trends

  • The patent’s strength is also influenced by recent legal decisions, such as those at the Federal Circuit, affecting patentability standards for chemical inventions.

  • The rise of patent challenges, including inter partes review (IPR), particularly for broad chemical claims, underscores the importance of claim specificity.


Implications for Stakeholders

For Patent Holders

  • Leveraging the detailed claims to license or defend against infringement.
  • Monitoring competing patents for potential infringement or opportunities to file for improvement.

For Competitors

  • Conducting clearance searches to avoid infringement.
  • Considering design-around strategies by exploiting claim limitations.

For Regulatory Bodies

  • Recognizing patent protection impact on drug availability and generic entry.

Key Takeaways

  • U.S. Patent 9,254,328 encompasses a sharply defined yet potentially broad scope based on its claims, primarily covering novel compounds or methods within the pharmaceutical field.
  • The strength and enforceability hinge on the specificity and breadth of the claims, with carefully crafted dependent claims reinforcing the overall protection.
  • The patent landscape is characterized by a complex network of overlapping patents, prior art references, and evolving legal standards, especially for chemical inventions.
  • Strategic considerations include ongoing surveillance of related patents, potential validity challenges, and leveraging specific claim embodiments for commercialization or licensing.

FAQs

  1. What is the primary focus of U.S. Patent 9,254,328?
    It centers on novel chemical compounds or methods related to therapeutic applications, with specific claims defining the chemical structures or processes protected.

  2. How broad are the claims in this patent?
    The claims' breadth depends on their language; broad claims may cover entire classes of compounds or procedures, while narrower claims focus on specific embodiments.

  3. Can this patent be challenged or invalidated?
    Yes, if prior art is found that anticipates or renders the claims obvious, or if the claims are deemed indefinite, the patent could be challenged or invalidated.

  4. What is the significance of the patent landscape around this patent?
    It indicates the competitive environment, potential overlaps with other IP rights, and influences licensing, litigation, and R&D strategies.

  5. When will this patent expire, and what factors could influence this?
    Typically around 2036, considering a standard 20-year term, but patent term adjustments or maintenance fee issues could affect the actual expiration date.


References

  1. U.S. Patent No. 9,254,328.
  2. USPTO Official Patent Database.
  3. Recent legal analysis on chemical patent validity.
  4. Patent landscape reports for pharmaceutical compounds.
  5. PTO guidance on patent claim formalities and scope.

More… ↓

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Drugs Protected by US Patent 9,254,328

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pf Prism Cv TYGACIL tigecycline POWDER;INTRAVENOUS 021821-001 Jun 15, 2005 AP RX Yes Yes ⤷  Get Started Free ⤷  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 9,254,328

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 053827 ⤷  Get Started Free
Argentina 109500 ⤷  Get Started Free
Australia 2006223226 ⤷  Get Started Free
Brazil PI0608464 ⤷  Get Started Free
Canada 2602089 ⤷  Get Started Free
China 101132775 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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