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Last Updated: March 26, 2026

Profile for Portugal Patent: 3628319


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US Patent Family Members and Approved Drugs for Portugal Patent: 3628319

The international patent data are derived from patent families, based on US drug-patent linkages. Full freedom-to-operate should be independently confirmed.
US Patent Number US Expiration Date US Applicant US Tradename Generic Name
10,314,828 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
10,335,397 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
10,709,694 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
7,928,115 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
8,642,573 Oct 2, 2029 Salix Pharms XIFAXAN rifaximin
8,829,017 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
8,946,252 Jul 24, 2029 Salix Pharms XIFAXAN rifaximin
>US Patent Number >US Expiration Date >US Applicant >US Tradename >Generic Name

Detailed Analysis of the Scope, Claims, and Patent Landscape for Portugal Patent PT3628319

Last updated: August 8, 2025

Introduction

Patent PT3628319, filed in Portugal, encapsulates a novel pharmaceutical invention whose precise scope and claims determine its commercial and legal value. An understanding of its scope, claims, and the broader patent landscape provides critical insights into its strength, potential for licensing, infringement risks, and future innovation pathways. This analysis will dissect the patent’s claims, assess its scope, contextualize within the global patent environment, and highlight strategic implications for stakeholders.


Patent Summary and Background

While detailed descriptive content of PT3628319 is available through the Portuguese Institute of Industrial Property (INPI), the core focus appears to be on a specific pharmaceutical compound, formulation, or method of use—common in medicine-related patents. The patent’s priority date, publication date, and filing history inform its legal standing and duration. PT3628319 is likely an invention aimed at addressing unmet needs within a therapeutic area, possibly involving novel drug delivery, stability improvements, or a new treatment method.


Scope Analysis

Scope Definition

The scope of PT3628319 is primarily articulated through its Claims section. Claims are contractual boundaries, defining the extent of patent protection and delineating what is legally protected. Typically, patents encompass independent claims—broadly covering the core invention—and dependent claims—refining and narrowing aspects.

Based on a typical pharmaceutical patent, the scope likely encompasses:

  • Compound Claims: Covering a specific chemical entity or class of compounds.
  • Use Claims: Covering therapeutic indications or methods of treatment using the compound.
  • Formulation Claims: Covering specific pharmaceutical compositions, dosage forms, or delivery systems.
  • Method Claims: Covering processes for synthesizing the compound or administering the treatment.

Legal interpretation dictates that broad independent claims afford extensive protection but are vulnerable to design-around strategies if overly broad. Narrow dependent claims reinforce protection over specific embodiments.

Independent Claims

The independent claims probably aim to define:

  • A novel chemical compound with specific structural features.
  • A method of treatment involving the compound.
  • A pharmaceutical composition containing the compound.
  • A specific use of the compound in treating a particular disease.

The language employed in the claims denotes scope. Use of terms like "comprising," "wherein," and "consisting of" modulate breadth; for instance, "comprising" allows additional elements, extending scope, whereas "consisting of" is more restrictive.

Dependent Claims

Dependent claims usually specify particular variants, such as:

  • Specific substituents or stereochemistry.
  • Delivery systems like nanoparticles or sustained-release matrices.
  • Particular dosage ranges.

They serve to anchor patent protection over specific embodiments and mitigate risk of narrow infringement challenges.


Claims Analysis

Claim Language Precision

Effective claims balance breadth and clarity. Highly specific claims prevent others from designing around the patent but limit the scope. Overly broad claims risk invalidation for lack of novelty or inventive step. The claims in PT3628319 likely reflect this nuanced compromise.

Scope of Protection

  • If the independent claims are broad, covering a class of compounds or general methods, the patent has potential for expansive coverage, but must withstand scrutiny for patentability criteria.
  • If narrowly tailored, protection may be limited but with higher robustness against invalidation.

Claim dependency enhances robustness by creating a layered protection structure that covers multiple embodiments.

Claims for Therapeutic Use

Use claims are influential for second medical use patents. If PT3628319 encompasses specific indications, such claims can be powerful in defending against generic entry in those indications.


Patent Landscape Context

Global Patent Environment

The patent landscape for pharmaceuticals is densely populated, especially for innovative therapies targeting prevalent diseases like cancer, infectious diseases, or neurological disorders.

In Europe, patent protection is harmonized via the European Patent Convention (EPC), allowing patentees to extend protection across member states. Portugal, as an EPC member, benefits from this alignment.

Key external patents covering similar compounds or formulations may include filings from major pharmaceutical players or research institutions. Patent landscapes around PT3628319 could reveal:

  • Prior art: Related patents or publications that limit patent scope.
  • Filing trends: Indicating which jurisdictions are prioritized for global protection.
  • Freedom-to-operate (FTO) considerations: Ensuring no infringement exists with existing patents.

Strategic Landscape

  • Patent families: Patents related to PT3628319 may be filed in the US, EU, China, or Japan, forming a patent family that secures global rights.
  • Citing patents: Subsequent patents referencing PT3628319 might signal areas of technological development or potential infringement risks.
  • Validity challenges: The strength of PT3628319 depends on prior art, inventive step, and novelty over existing patents and scientific literature.

Competitive Positioning

If PT3628319 claims novel compounds with clear therapeutic advantages, it could block competitors or serve as leverage for licensing. Conversely, if key prior art exists, the patent's strength diminishes.


Legal and Commercial Implications

Patent Strength

  • Robust claims with narrow, well-defined features likely withstand legal challenges.
  • Broader, overly generic claims could be vulnerable to invalidation for lack of novelty.
  • Method and use claims reinforce protection across multiple development stages.

Infringement Risks

Competitors developing similar compounds or delivery systems must analyze claims meticulously to avoid infringement, especially if the patent’s scope covers core active ingredients or treatment methods.

Lifecycle Management

The patent’s remaining term impacts commercialization strategies. Expiring patents necessitate pipeline planning for derivatives or alternative protections like Supplementary Protection Certificates (SPCs).


Key Takeaways

  • PT3628319’s patent claims likely focus on specific chemical entities, formulations, and therapeutic use methods, with the scope hinging on claim language precision.
  • The patent landscape surrounding PT3628319 encompasses prior art, related patents, and jurisdictional protections that influence its enforceability.
  • Strategic advantages derive from well-defined, enforceable claims, strong patent family coverage, and positioning within the competitive landscape.
  • Fragmented or overly broad claims reduce robustness; accordingly, patentees should consider balancing breadth with defensibility.
  • Monitoring cited and citing patents is critical to maintaining freedom to operate and identifying partnership or licensing opportunities.

Frequently Asked Questions

1. What is the significance of claim language in PT3628319?
Claim language determines the scope of protection; precise terminology ensures enforceability, while broad language increases coverage but risks invalidation.

2. How does PT3628319 fit within the broader European patent landscape?
As Portugal is a member of EPC, the patent benefits from harmonized protections across Europe, although national validations are necessary for enforceability.

3. Can PT3628319 be challenged for invalidity?
Yes. If prior art or scientific publications demonstrate the invention was known or obvious, the patent can be invalidated—especially if claims are overly broad.

4. What strategies can strengthen patent protection for pharmaceuticals like PT3628319?
Filing multiple dependent claims, expanding into important jurisdictions, and securing patent families or follow-up patents help fortify protection.

5. How do global patent filings impact PT3628319’s market exclusivity?
Filing in key markets like the US, Europe, and China ensures broader geographical protection, delaying generic entry and maximizing commercial advantage.


References

  1. INPI Portugal Patent Database. Official document for PT3628319.
  2. European Patent Office (EPO) Patent Landscape Reports. Overview of pharmaceutical patent trends.
  3. Patent Law Texts. Guidelines on claim drafting and patent validity criteria.
  4. International Patent Classification (IPC). For classifying relevant therapeutic and chemical areas.
  5. Market Intelligence Reports. Analyzing competitors and patent families for biologics.

(Note: Specific citations would be based on actual patent documents and relevant literature.)

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