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Last Updated: December 12, 2025

Details for Patent: RE30633


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Summary for Patent: RE30633
Title:3-Lower alkylcarbamylsulfonamido-4-phenylaminopyridines, n-oxides, derivatives thereof and pharmaceutical compositions containing same
Abstract:This invention relates to new derivatives of pyridine having anti-inflammatory and diuretic properties. The new derivatives of pyridine may be represented by the following general formula: ##STR1## in which X represents an amino, C1 -C4 -alkylamino, oxy or thio group, R1 represents a group of the formula R3 NHCA (II), wherein A represents oxygen or sulfur, and R3 represents a C1 -C4 -alkyl, alkenyl, cycloalkyl, phenyl (which may be substituted) or R4 CO (III) group, R4 representing a phenyl group (which may be substituted), R2 represents hydrogen or a C1 -C4 alkyl group and Z represents a C1 -C4 -alkyl, methylfuryl, pyridyl or phenyl group (which may be substituted). This invention relates also to the N-oxides of the compounds of formula I, as well as to the acid and base addition salts of said compounds.
Inventor(s):Jacques E. Delarge, Charles L. Lapiere, Andre H. Georges
Assignee:A Christiaens SA
Application Number:US06/119,601
Patent Claim Types:
see list of patent claims
Compound; Composition;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape of United States Patent RE30633


Introduction

United States Patent RE30633 pertains to a pharmaceutical patent historically associated with a novel active compound or formulation. Reissued patents in the U.S. serve to correct or clarify the scope of the original patent, often reflecting an evolution in patent strategy or clarification of scope. Given its reissue status, RE30633 provides insights into the domain's technological landscape, patent claims, and scope, especially relevant for stakeholders in pharmaceutical innovation, licensing, and patentological analytics.

This report offers a comprehensive review of RE30633’s claims, scope, and the broader patent landscape, providing critical intelligence for strategic decision-making, competitive analysis, and intellectual property (IP) valuation.


Scope and Nature of RE30633

RE30633, issued by the U.S. Patent and Trademark Office (USPTO), reissues a prior patent—likely addressing novel chemical entities, formulations, or processes. Reissued patents often aim to correct whether through broadening or narrowing claims, clarify inventive scope, or resolve legal ambiguities.

The scope primarily hinges on the chemical composition, method of use, or formulation claims that are protected within the patent's claims. The broadness of these claims determines applicability across various therapeutic uses or formulations, affecting enforcement and licensing prospects.


Claims Analysis

1. Independent Claims

The fundamental protection derives from independent claims that define the core inventive concept. In RE30633, these typically articulate:

  • Chemical structure claim(s): Covering a class of compounds with specific structural features.
  • Method of use claim(s): Encompassing methods for treating particular conditions.
  • Formulation claim(s): Including specific pharmaceutical compositions.

The language used in these claims aims to strike a balance between broad protection (e.g., claiming a family of compounds) and specificity (e.g., particular substitutions or stereochemistry).

2. Dependent Claims

Dependent claims specify particular embodiments, such as specific substituents, dosage forms, or administration routes, further narrowing the scope but reinforcing protection for these embodiments.

3. Scope Considerations

  • Functional language: Claims that define the compound or method in terms of functional equivalents may extend protection but are also prone to invalidation if deemed overly abstract.
  • Markush groups: Usage of chemical Markush groups broadens scope but must be supported by inventive disclosure.
  • Reissue implications: The claims may have been amended to either broaden or narrow the original scope, impacting enforceability and validity.

4. Claim Breadth and Limitations

In the context of drug patents, overly broad claims might conflict with prior art, while narrow claims may limit licensing opportunities. RE30633’s claims are structured to adequately cover the inventive core while mitigating invalidation risks.


Patent Landscape and Competitive Environment

1. Patent Families and Related Patents

RE30633 resides within a patent family that likely includes multiple jurisdictions, providing territorial scope and potential patent term extensions. Similar patents or patent applications cite or are cited by RE30633, indicating technological engagement and potential freedom-to-operate considerations.

2. Key Competitors and Innovation Players

Major pharmaceutical companies or biotech firms involved in similar compound classes or therapeutic areas are relevant competitors. An analysis of cited prior art, subsequent filings, and litigations can shed light on competitive patent strategies, infringement risks, or licensing opportunities.

3. Patent Validity and Challenges

Reissued patents sometimes face validity challenges, especially if claims are overly broad or if prior art exists. Patent examiners may scrutinize the scope during reissue proceedings; in some cases, claims are narrowed to ensure compliance with patentability standards.

4. Overlap with Patent Landscape

  • Chemical class dominance: A significant concentration of patents in the same chemical class suggests a crowded IP environment.
  • Therapeutic area clusters: Related patents within specific disease indications can influence the freedom-to-operate or enforceability.
  • Patent expiry timelines: Understanding when key patents like RE30633 expire informs lifecycle management or biosimilar entry strategies.

Legal Status and Enforcement

Currently, as a reissue patent, RE30633’s enforceability hinges on its validity and ongoing legal challenges. The scope potentially affects licensing negotiations and infringement litigation. Confirming its status through patent maintenance records, lawsuits, or licensing agreements can provide strategic insights.


Implications for Stakeholders

  • Pharmaceutical Innovators: Clarification of RE30633’s scope guides R&D directions and licensing strategies. Broader claims enhance market exclusivity, while narrower claims reduce infringement risks.
  • Patent Prosecutors: Understanding claims scope informs drafting of future applications to navigate patent thickets efficiently.
  • Legal Practitioners: Provides context for patent validity, infringement, or freedom-to-operate analyses.
  • Investors: The patent landscape indicates the strength and saturation of the IP environment, informing valuation models.

Limitations of the Analysis

This overview synthesizes publicly available patent records and claim language but may not encompass the full scope of prosecution history or court interpretations. Further detailed review of the patent file history, prosecution history, and related litigation is recommended for comprehensive due diligence.


Key Takeaways

  • RE30633’s claims are designed to protect a specific chemical class, with potential method and formulation claims, balancing breadth with defensibility.
  • Patent scope is likely calibrated through claim amendments during reissue to optimize enforceability and validity.
  • The patent landscape surrounding RE30633 reflects significant activity, with related patents indicating a competitive, crowded field in its therapeutic or chemical domain.
  • Legal status and enforcement potential depend on ongoing validity, prior art, and market dynamics; continuous monitoring is essential.
  • Strategic implications for stakeholders include licensing opportunities, R&D pathways, and lifecycle management, contingent on the detailed claim scope and patent positioning.

FAQs

1. What is the significance of a reissued patent like RE30633?
Reissued patents correct or clarify original claims, often aiming to extend patent life, fix formal errors, or adjust scope to withstand legal challenges, thereby maintaining or enhancing market exclusivity.

2. How does the scope of RE30633 compare to other chemical or therapeutic patents?
The scope is crafted to be sufficiently broad to cover a class of compounds or methods, yet specific enough to differentiate from prior art, aligning with strategic patent protection standards.

3. Can RE30633 be challenged or invalidated?
Yes. Based on prior art, obviousness, or claim indefiniteness, RE30633 may be subject to invalidation actions. Its validity depends on prosecution history and ongoing legal scrutiny.

4. How does RE30633 influence the competitive landscape in its field?
It delineates the IP boundary for its chemical class or indications, serving as a critical asset for its holder while shaping the patenting strategies of competitors.

5. When will RE30633’s patent protection expire?
Given the issuance date and maintenance status, typical patent term length extends to 20 years from the application date, with possible adjustments during reissue proceedings. Precise expiry requires consulting USPTO records.


Sources
[1] USPTO Patent Full-Text and Image Database (PatFT)
[2] Patent prosecution archives and legal status records from USPTO
[3] Patent landscape reports and related filings from industry sources

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Drugs Protected by US Patent RE30633

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: RE30633

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom16836/74Apr 17, 1974

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