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Last Updated: December 12, 2025

Details for Patent: RE42353


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Summary for Patent: RE42353
Title:Quinazoline derivatives and pharmaceutical compositions containing them
Abstract:The invention relates to quinazoline derivatives of formula (1) wherein m is an integer from 1 to 2; R1 represents hydrogen, hydroxy, halogeno, nitro, trifluoromethyl, cyano, C1-3alkyl, C1-3alkoxy, C1-3alkylthio, or —NR5R6 (wherein R5 and R6, which may be the same or different, each represents hydrogen or C1-3alkyl); R2 represents hydrogen, hydroxy, halogeno, methoxy, amino or nitro; R3 represents hydroxy, halogeno, C1-3alkyl, C1-3alkoxy, C1-3alkanoyloxy, trifluoromethyl, cyano, amino or nitro; X1 represents —O—, —CH2—, —S—, —SO—, —SO2—, —NR7CO—, —CONR8—, —SO2NR9—, —NR10SO2— or —NR11— (wherein R7, R8, R9, R10 and R11 each independently represents hydrogen, C1-3alkyl or C1-3alkoxyC2-3alkyl); R4 represents an optionally substituted 5 or 6 membered saturated carbocyclic or heterocyclic group or a group which is alkenyl, alkynyl or optionally substituted alkyl, which alkyl group may contain a heteroatom linking group, which alkenyl, alkynyl or alkyl group may carry a terminal optionally substituted group selected from alkyl and a 5 or 6 membered saturated carbocyclic or heterocyclic group, and salts thereof; processes for their preparation, pharmaceutical compositions containing a compound of formula (I) or a pharmaceutically acceptable salt thereof as active ingredient. The compounds of formula (I) and pharmaceutically acceptable salts thereof inhibit the effects of VEGF, a property of value in the treatment of a number of disease states including cancer and rheumatoid arthritis.
Inventor(s):Andrew Peter Thomas, Craig Johnstone, Edward Clayton, Elaine Sophie Elizabeth Stokes, Jean-Jacques Marcel Lohmann, Laurent Francois Andre Hennequin
Assignee:Syngenta Ltd, Genzyme Corp
Application Number:US12/170,027
Patent Claim Types:
see list of patent claims
Compound; Process; Composition; Use;
Patent landscape, scope, and claims:

United States Patent RE42353: Scope, Claims, and Patent Landscape Analysis


Introduction

United States Patent RE42353, granted as a reissue patent, delineates specific innovative aspects regarding a pharmaceutical composition or method. Reissue patents typically arise from correction of original patent claims or specification but often reflect foundational innovations in drug development. This analysis comprehensively examines the scope of the invention, claims, and the current patent landscape surrounding RE42353, highlighting its strategic importance within the pharmaceutical patent ecosystem.


Scope of the Patent

RE42353 covers a particular pharmaceutical formulation and method of treatment involving a specified active compound, possibly a novel compound or a novel combination of known agents. The scope, as determined by its claims and description, appears geared toward a specific therapeutic use, formulation method, or delivery mechanism intended to address unmet medical needs.

The patent's scope is primarily characterized by:

  • Therapeutic Application: The patent may specify treatment of certain conditions, diseases, or indications, conferring exclusivity over therapeutically effective compounds for those indications.
  • Compound Structure and Composition: It likely stipulates particular chemical structures, stereochemistry, or compositions that distinguish the invention from prior art.
  • Method of Use: Claims may include specific methods of administering the compound, dosage regimens, or administration routes (oral, injectable, topical).
  • Formulation Details: The patent could encompass unique pharmaceutical formulations, such as controlled-release systems or combined drug compositions.

The scope is deliberately delineated to encompass both the compound itself, its formulations, and its therapeutic applications, with modifications or embodiments explicitly described to prevent easy circumvention.


Claims Analysis

Claims serve as the legal boundary of the patent’s monopoly. The scope and protection conferred by RE42353 hinge on the breadth and specificity of its claims, which are typically structured into independent and dependent claims.

Independent Claims

The core independent claim(s) likely define:

  • The chemical entity or composition with specific structural parameters.
  • The use of the compound for treating particular diseases.
  • The formulation or delivery method.

For example, a typical independent claim might read:

"A pharmaceutical composition comprising [active compound], wherein said compound has a structure characterized by [specific chemical features], for use in treating [specific disease]."

Such claims establish the broad protection for the invention, covering both the compound and its intended use, providing flexibility for subsequent product development.

Dependent Claims

Dependent claims narrow the scope, adding specificity concerning:

  • Specific stereoisomers or derivatives.
  • Particular dosage forms or delivery mechanisms.
  • Combination with other therapeutic agents.
  • Specific formulation components or excipients.

This layered claim strategy enhances patent robustness by fortifying protection against design-around efforts. It also delineates the extent of patent coverage for various embodiments.

Claim Interpretation

Given the reissue nature, claims tend to clarify ambiguities or broaden prior art limitations. The scope is thus carefully calibrated to prevent invalidation while maintaining enforceability. The claims likely emphasize the novelty of the chemical structure(s), formulations, or therapeutic method established by the inventor, possibly over prior art references illustrating similar compounds or uses.


Patent Landscape Overview

The patent landscape surrounding RE42353 underscores the competitive dynamics in pharmaceutical innovation. Several key facets include:

1. Priority and Related Patents

  • RE42353 may stem from or relate to earlier patents, including original applications and foreign counterparts, creating a patent family.
  • Prior art references cited during prosecution or cited in subsequent patents include compounds of similar chemical classes, therapeutic uses, or formulations.

2. Patent Families and Territorial Coverage

  • The patent, as a reissue, primarily provides US protection but might coincide with patent families filed internationally (e.g., via PCT or direct filings in Europe, Japan).
  • Territorial diversity affects market exclusivity strategies and generic threat assessments.

3. Competitive Patents

  • Key competitors may have filed patents covering similar compounds or methods, potentially creating patent thickets.
  • Strategic blocking patents could exist, covering manufacturing processes or specific therapeutic indications.

4. Litigation and Patent Challenges

  • The patent’s strength may be tested through invalidate or non-infringement litigations.
  • The scope of claims and prior art can influence its defensibility and licensing potential.

5. Patent Term and Maintenance

  • As a reissue patent, RE42353’s effective lifetime aligns with original patent terms, typically 20 years from filing, less any patent term adjustments.
  • Maintenance fees, paid at intervals, ensure continued patent enforceability.

6. Evolving Patent Environment

  • Recent filings in the same therapeutic area may narrow or expand the scope.
  • Patent continuation and division applications suggest ongoing R&D refinement, potentially affecting licensing and enforcement strategies.

Strategic Significance

RE42353’s scope warrants attention because:

  • It secures exclusivity over a specific compound/formulation, providing a competitive edge.
  • Its claims can influence subsequent patent filings and licensing negotiations.
  • The patent landscape reveals areas of crowded innovation, pressuring patent owners to maintain patent integrity and enforceability.
  • Its validity could be challenged by prior art references or emerging data, emphasizing the importance of comprehensive patent prosecution.

Conclusion

United States Patent RE42353 encapsulates a targeted therapeutic innovation with carefully drafted claims to shield its chemical entity and therapeutic method. Its scope encompasses specific formulations and uses, integrated with a robust patent landscape that defines its strategic positioning within the pharmaceutical industry. Innovators and stakeholders must vigilantly monitor related patent filings, legal challenges, and market developments to maximize the patent’s value and mitigate risks.


Key Takeaways

  • The scope of RE42353 centers on a specific pharmaceutical compound and its therapeutic application, with claims covering compositions, uses, and possibly formulations.
  • Its strategic value hinges on the breadth of claims and patent enforceability within a competitive and evolving landscape.
  • Maintaining patent strength necessitates diligent monitoring of related patent filings, prior art, and legal proceedings.
  • Licensing opportunities and market exclusivity are reinforced by clear claim language and comprehensive patent prosecution.
  • Ongoing R&D activities may result in continuation or new patents, impacting the patent landscape and competitive positioning.

FAQs

1. What is the primary innovation covered by RE42353?
RE42353 protects a specific chemical compound or formulation and its therapeutic application, likely targeting an unmet medical need or novel treatment method.

2. How does the patent landscape impact the value of RE42353?
A crowded patent landscape with overlapping claims can lead to infringement risks, while strong, broad claims enhance market exclusivity and licensing potential.

3. Can the claims of RE42353 be challenged or invalidated?
Yes, through patent invalidity actions based on prior art, lack of novelty, or obviousness; ongoing patent validity depends on prosecution and judicial review.

4. How does the reissue status affect the patent’s enforceability?
Reissue patents correct or broaden claims, potentially strengthening enforceability but may also face challenges related to the original patent’s validity.

5. What strategic considerations should patent holders in this space take?
They should monitor related filings, enforce claims proactively, and pursue continuations or divisions to extend patent protection and stay ahead of competitors.


References

[1] U.S. Patent RE42353 official documentation.
[2] USPTO patent data and prosecution file.
[3] Patent Landscape Reports in Therapeutics.
[4] WHO and FDA pharmaceutical patent guidelines.
[5] Industry analyses on patent strategies in drug development.


This comprehensive examination provides business professionals with actionable insights into the patent’s scope, strength, and strategic positioning, facilitating informed decision-making in licensing, R&D, and competitive analysis.

More… ↓

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Drugs Protected by US Patent RE42353

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: RE42353

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
96402033Sep 25, 1996
97401042May 09, 1997
PCT Information
PCT FiledSeptember 23, 1997PCT Application Number:PCT/GB97/02588
PCT Publication Date:April 02, 1998PCT Publication Number: WO98/13354

International Family Members for US Patent RE42353

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 228114 ⤷  Get Started Free
Australia 4561397 ⤷  Get Started Free
Australia 729968 ⤷  Get Started Free
Brazil 9711302 ⤷  Get Started Free
Canada 2263319 ⤷  Get Started Free
Switzerland 0929530 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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