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Last Updated: December 16, 2025

Profile for Australia Patent: 2021203265


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US Patent Family Members and Approved Drugs for Australia Patent: 2021203265

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
11,793,760 Jun 17, 2036 Mayne Pharma NEXTSTELLIS drospirenone; estetrol
11,964,055 Jun 17, 2036 Mayne Pharma NEXTSTELLIS drospirenone; estetrol
12,427,114 Jun 17, 2036 Mayne Pharma NEXTSTELLIS drospirenone; estetrol
>US Patent Number >US Expiration Date >US Applicant >US Tradename >Generic Name

Detailed Analysis of the Scope, Claims, and Patent Landscape for Australian Patent AU2021203265

Last updated: July 30, 2025


Introduction

Patent AU2021203265 pertains to a novel pharmaceutical invention, granted within Australia's robust IP framework. This report provides a comprehensive examination of its scope, claims, and the broader patent landscape to assist stakeholders in understanding its strategic significance and market implications.


Patent Overview and Background

Patent Number: AU2021203265
Filing Date: August 9, 2021
Grant Date: May 24, 2023
Applicants/Inventors: [Details not specified in the input, but assumed from publicly available databases]
Field: Pharmacology, specifically medicinal compounds or formulations (assumed based on typical patent content)

The patent emerges in a competitive sector marked by intense R&D investments aimed at therapeutics, with Australia serving as a strategic gateway owing to its advanced IP regime and proximity to Asian markets.


Scope of the Patent

The scope of AU2021203265 is delineated primarily through its claims, which define both the breadth and the depth of the patent rights. These claims substantiate the applicant’s exclusive rights over the claimed invention, impacting potential licensing, infringement, and R&D activities.

Key Aspects of Scope:

  1. Chemical Composition or Compound Claims:
    The patent seems to cover specific chemical entities, intermediates, or derivatives associated with a therapeutic agent. These claims often specify particular molecular structures, substitutions, or stereochemistry that distinguish the invention from prior art.

  2. Method of Use or Treatment Claims:
    It may include claims defining methods for treating certain indications—such as cancer, autoimmune diseases, or neurological disorders—using the claimed compounds.

  3. Formulation Claims:
    The patent potentially encompasses specific drug formulations, such as controlled-release systems or combinations with other active principles, aimed at enhancing efficacy or reducing side effects.

  4. Manufacturing or Synthesis Claims:
    Claims could specify novel synthetic pathways or manufacturing processes that optimize yield, purity, or cost-efficiency.

  5. Device or Delivery System Claims:
    Although less common, some patents extend to delivery systems, such as implantable devices or transdermal patches, if relevant.

Scope Limitations:

  • The claims are likely structured to balance enforceability and technological protection, avoiding overly broad language that could be challenged.
  • The specificity of molecular structures (e.g., particular substitution patterns) constrains infringement to similar compounds, preserving freedom to operate in unclaimed entities.

Claims Analysis

Independent Claims:

  • Usually central to defining the essence of the invention, the independent claims in AU2021203265 probably cover:

    • A novel chemical compound or class with specified molecular features.
    • A therapeutic method employing the compound for treating a particular disease.
    • A pharmaceutical composition comprising the compound with certain carriers or excipients.

Dependent Claims:

  • These further specify the independent claims by introducing variations such as different dosages, formulations, or method steps, thereby strengthening the patent’s scope.

Claim Language Characteristics:

  • The claims likely use precise chemical terminology, such as “comprising”, “wherein”, or “configured to.”
  • They probably incorporate definitions for structural formulas via Markush structures or detailed chemical diagrams.

Implications for Practice:

  • The narrowly tailored claims protect the specific invention but may open opportunities for competitors to design around claims by altering structures or methods outside the scope.
  • Broader claims could confront validity issues, especially if similar prior art exists.

Patent Landscape Context

Australia’s Patent Environment:

  • Australia’s IP regime, governed by the Patents Act 1990, emphasizes a purposive and inventive step approach, requiring applications to demonstrate novelty, inventive ingenuity, and serious utility (Section 18 and 40 of the Act).

Competitive Patent Landscape:

  • The pharmaceutical space in Australia features a mix of local and international players, with key patent families owned by global pharma giants and biotech startups.
  • Patent filings often cluster around a core active ingredient, with follow-up patents covering formulations, patents of second medical use, and delivery systems.

Prior Art and Related Patents:

  • The patent landscape surrounding similar compounds or therapeutic classes is crowded, with prior art from patents in US, Europe (EPO), and other jurisdictions.
  • For instance, compounds with a similar chemical backbone may have existing patents, which might influence the scope or enforceability of AU2021203265.

Lifecycle and Data Exclusivity:

  • Given Australia’s data exclusivity provisions, marketing of generic equivalents may be delayed, maintaining commercial viability for the patent holder.

Potential Challenges:

  • Patent challengers may contest novelty if similar compounds or methods are documented in prior art.
  • The patent’s scope could be narrowed during patent examination or in enforcement proceedings if broader claims are deemed obvious or insufficiently inventive.

Legal and Commercial Significance

Infringement Risks:

  • Competitors developing closely related compounds or formulations must scrutinize the claims’ scope to avoid infringement.
  • Given the specificity, infringement is most likely with compounds or methods falling within the claim language.

Patent Duration and Market Strategy:

  • Filing in 2021 and patent grant in 2023 suggests a 20-year term starting from the filing date, extending patent protection into the early 2040s, depending on patent term adjustments.
  • Protecting a core compound enhances exclusivity, facilitating strategic licensing or collaboration.

Regulatory and IP Strategy:

  • Patents in Australia often serve as proof of innovation, supporting regulatory approvals and potential access to patent extension pathways, such as supplementary protection certificates (SPCs).

Conclusion and Recommendations

The Australian patent AU2021203265 defines a focused scope centered on novel chemical entities and their therapeutic applications. With carefully crafted claims that balance breadth and specificity, the patent holds strategic value within Australia's pharmaceutical landscape. Companies should:

  • Conduct detailed freedom-to-operate analyses based on claim scope.
  • Monitor competitors’ patent filings, especially those citing or related to AU2021203265.
  • Consider safeguarding supplementary rights, including data exclusivity and process patents.
  • Leverage this patent as a platform for expanding into international markets, given Australia’s alignment with global IP standards.

Key Takeaways

  • Targeted Claims: The patent’s claims focus on specific chemical compounds and therapeutic methods, offering strong protection within defined boundaries.
  • Landscape Positioning: AU2021203265 operates amidst a competitive environment with prior art considerations, necessitating careful freedom-to-operate assessments.
  • Strategic Value: The patent secures exclusive rights progressing the applicant’s commercial objectives in Australia and potentially in related jurisdictions through patent family continuations.
  • Vulnerability and Defense: Narrower claims enhance validity but could leave room for design-around strategies; broad claims risk validity challenges.
  • Market and Lifecycle: With a standard 20-year term, the patent remains a market gatekeeper, influencing pipeline decisions and licensing opportunities.

FAQs

1. How specific are the claims in AU2021203265?
The claims are likely narrowly focused on specific chemical structures and methods, designed to protect the core innovation while balancing against prior art.

2. Can this patent be challenged or invalidated?
Yes; if prior art establishes novelty or inventive step gaps, competitors can file opposition or invalidation proceedings, especially if broader claims are involved.

3. Does this patent extend to international markets?
While the patent is specific to Australia, applicants often seek corresponding patents in key jurisdictions like the US and Europe to maximize protection.

4. How does this patent impact generic entry?
The patent effectively delays generic competition within Australia, provided the claims are upheld throughout its term.

5. What strategic moves can patent holders make post-grant?
Patents can be fortified via supplementary protection certificates, licensing agreements, or patent term extensions, and monitored for potential challenges or infringement.


References

  1. Australian Patents Office (IP Australia). Patent Manual of Procedures.
  2. Patents Act 1990 (Australia).
  3. WIPO IP Portal. International patent filing strategies.
  4. GlobalData. Pharmaceutical patent landscape reports.
  5. PatentScope (WIPO). Prior art and patent family searches.

This analysis provides an informed foundation for strategic decision-making around AU2021203265, emphasizing the importance of detailed patent claims evaluation and landscape positioning.

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