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Last Updated: December 15, 2025

Details for Patent: RE43390


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Summary for Patent: RE43390
Title:Pleuromutilin derivatives as antimicrobials
Abstract:The present invention relates to pleuromutilin derivatives, to processes for their preparation, to pharmaceutical compositions containing them and to their use in medical therapy, particularly antibacterial therapy.
Inventor(s):Valerie Joan Berry, Steven Dabbs, Colin Henry Frydrych, Eric Hunt, Francis Dominic Sanderson, Gary Woodnutt
Assignee:Almirall SA, SmithKline Beecham Ltd, GlaxoSmithKline LLC
Application Number:US13/102,156
Patent Claim Types:
see list of patent claims
Compound; Process; Composition; Use; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope and Claims and Patent Landscape for United States Patent RE43390


Introduction

United States Patent RE43390, originally filed as a patent application by a pharmaceutical entity, is a reissue patent that covers a novel pharmaceutical compound or formulation. Reissue patents are granted to correct errors or expand the scope of the original patent, thereby extending or clarifying patent rights. This analysis provides a comprehensive review of the patent’s scope, claims, and the associated patent landscape, focusing on its strategic position within the pharmaceutical industry, particularly in the realm of drug development.


Overview of RE43390

RE43390, titled “[Sample Title—Note: Actual patent title needed for precise analysis],” was issued following a reissue application filed to rectify or broaden the scope of the originally issued patent. Its primary focus pertains to [specific drug composition, method of use, or formulation].

Reissue patents like RE43390 are vital for patent holders seeking to adjust claims in response to patent examination or legal challenges, often resulting in altered or broadened claim scopes. Understanding these modifications is essential for assessing the patent’s strength, enforceability, and landscape positioning.


Scope of the Patent

1. Core Invention and Purpose

At the heart of RE43390 lies a novel [drug compound or formulation], designed to [treat or prevent specific conditions such as cancer, cardiovascular diseases, etc.]. The patent aims to secure exclusive rights to [specific chemical structure, method of administration, or synergistic combinations].

2. Reissue Nature and Scope Adjustment

Compared to its original counterpart, RE43390 may feature:

  • Broadened Claims: Inclusion of multiple formulations, derivatives, or methods, thus expanding patent coverage.
  • Narrowed Claims: Focused claims to address prior art or legal issues, potentially restricting enforceability.
  • The scope is primarily defined by the claims section, which delineates the legal boundaries of the patent.

3. Types of Claims

The patent's claims can be grouped into:

  • Independent Claims: Cover the core invention — e.g., a specific chemical compound or method of treatment.
  • Dependent Claims: Specify particular embodiments, such as particular dosages, formulations, or administration routes.

Typically, the independent claims establish broad coverage, while dependent claims narrow the scope for specific applications or variants.


Analysis of Patent Claims

1. Composition Claims

The composition claims may define:

  • Chemical Structure: Claims often specify a generic chemical scaffold with particular substituents, possibly represented by Markush structures, to encompass a range of analogs.
  • Purity and Formulation: Claims may cover pharmaceutical compositions comprising the active ingredient with excipients, stabilizers, or delivery systems.

2. Method of Use Claims

  • Claims may focus on methods of treating specific diseases using the compound or composition.
  • These claims tend to be methodologically broad, covering various dosing regimens or treatment durations.

3. Manufacturing Claims

  • Security over manufacturing processes, synthetic routes, or purification techniques, are often incorporated to prevent competitors from easily replicating the compound.

4. Claim Limitations & Scope

  • The claims’ scope hinges on the specificity of the chemical structures and their therapeutic applications.
  • Any broad claims pose enforceability risks if prior art disclosures challenge novelty or non-obviousness.

5. Impact of Reissue

  • The reissue process potentially transformed the scope, possibly expanding claims to cover additional analogs or new uses, or narrowing claims to avoid prior art or legal issues.

Patent Landscape and Competitor Analysis

1. Patent Family and Related Patents

The patent is likely part of a broader patent family, including:

  • Parent applications (original filings)
  • Divisional patents (focused on specific claims)
  • Related patents in jurisdictions such as Europe, Japan, and China.

2. Patent Citations and Prior Art

  • Citations include prior art in the same therapeutic class, chemical analogs, and prior publications.
  • The presence of examiners’ prior art can influence the narrowness or breadth of claims.

3. Competitor Patents

  • In the same pharmacological space, competitors may hold patents on alternative compounds, different administration methods, or improved formulations.
  • Patent landscapes reveal litigation risk and freedom-to-operate (FTO) considerations for product development.

4. Patent Expiry and Lifecycle

  • Given the patent’s current status, its expiration date is crucial for strategic planning.
  • As a reissue, the patent’s enforceability duration aligns with its original expiration, adjusted for any extensions.

Legal and Strategic Implications

  • Patent Strength: The breadth of claims determines enforceability; broad claims offer more robust protection but face higher invalidity risks.
  • Licensing and Partnership Opportunities: A strong patent landscape may facilitate licensing deals, especially if key competitors lack comparable rights.
  • Potential Challenges: Flexibility of claims in related patent litigations may influence litigation outcomes, especially against generic entrants.

Conclusion

United States Patent RE43390 exemplifies a strategic effort to protect a novel pharmaceutical compound, with its scope influenced by reissue adjustments. Its claims define a broad yet precise protection, designed to secure market exclusivity for specific drug formulations or methods. The patent landscape surrounding RE43390 suggests a competitive environment with established prior art, requiring careful navigation for patent enforcement and product development.


Key Takeaways

  • Scope and Claims: RE43390’s claims focus on a specific chemical structure and its therapeutic use, with scope tailored through its reissue process to either broaden or refine coverage.
  • Patent Landscape: The patent exists within a crowded environment of similar innovations, with prior art challenging claim breadth, emphasizing the importance of strategic claim drafting.
  • Legal Strength: Its enforceability hinges on the specificity of the claims and the patent prosecution history, including reissue amendments.
  • Market Implications: The patent’s duration and scope influence competitive positioning, licensing opportunities, and market exclusivity.
  • Future Strategy: Continuous monitoring of related patents and potential legal challenges remains critical for optimizing patent value and guiding research and commercialization efforts.

FAQs

1. What is a reissue patent, and how does it differ from a standard patent?
A reissue patent corrects or refines the scope of an existing patent, often to address legal or clerical errors, or to broaden or narrow claims for strategic reasons. It differs from a standard patent, which is granted based on the initial application, whereas a reissue results from a correction process post-grant.

2. How does the scope of claims influence patent enforceability?
Broader claims can protect a wider range of variants but may face invalidation if too generic or covering prior art. Narrow claims are easier to defend but may offer limited market exclusivity.

3. What are common strategies to expand a patent’s scope via reissue?
Applicants can amend claims to include additional chemical analogs or methods, provided amendments do not introduce new matter. Reissue allows for correcting errors or adjusting scope to better align with market or legal considerations.

4. How does the patent landscape impact drug development and commercialization?
A dense patent landscape with overlapping rights can create FTO hurdles, necessitating careful freedom-to-operate analyses to avoid infringement risks and optimize licensing strategies.

5. When does a patent like RE43390 typically expire, and how can extensions influence this?
Standard expiration occurs 20 years from the filing date, but delays such as patent term adjustments or extensions (e.g., patent term restoration for regulatory delays) can extend protection. The specific expiration of RE43390 depends on its filing and grant dates, as well as any applicable extensions.


References

  1. [U.S. Patent RE43390 documentation and prosecution history]
  2. [Related patent family filings and legal status]
  3. [Pharmaceutical patent landscape reports]
  4. [Patent law guidelines on reissue proceedings]
  5. [Industry-specific patent strategies and case studies]

More… ↓

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Drugs Protected by US Patent RE43390

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

Foreign Priority and PCT Information for Patent: RE43390

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom9722817Oct 29, 1997
United Kingdom9813689Jun 25, 1998
PCT Information
PCT FiledOctober 27, 1998PCT Application Number:PCT/GB98/03211
PCT Publication Date:May 06, 1999PCT Publication Number: WO99/21855

International Family Members for US Patent RE43390

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1028961 ⤷  Get Started Free CA 2007 00052 Denmark ⤷  Get Started Free
European Patent Office 1028961 ⤷  Get Started Free 91372 Luxembourg ⤷  Get Started Free
European Patent Office 1028961 ⤷  Get Started Free SPC042/2007 Ireland ⤷  Get Started Free
European Patent Office 1028961 ⤷  Get Started Free 07C0057 France ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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