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Last Updated: December 17, 2025

Patent: 11,332,451


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Summary for Patent: 11,332,451
Title:RIP1 inhibitory compounds and methods for making and using the same
Abstract:Disclosed herein are kinase inhibitory compounds, such as a receptor-interacting protein-1 (RIP1) kinase inhibitor compounds, as well as pharmaceutical compositions and combinations comprising such inhibitory compounds. The disclosed compounds, pharmaceutical compositions, and/or combinations may be used to treat or prevent a kinase-associated disease or condition, particularly a RIP1-associated disease or condition.
Inventor(s):Masuda Esteban, Shaw Simon, Taylor Vanessa, Bhamidipati Somasekhar
Assignee:Rigel Pharmaceuticals, Inc.
Application Number:US17023127
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 11,332,451


Introduction

United States Patent 11,332,451 (hereafter “the '451 patent”) signifies a notable development in the intellectual property landscape concerning innovative biotechnological or pharmaceutical inventions, depending on its specific technical focus. As patent landscapes grow increasingly complex, evaluating the claims and contextual positioning of patents like the '451 is critical for R&D strategies, licensing negotiations, and competitive intelligence within the biotechnology and pharmaceutical sectors. This analysis offers a detailed critique of the '451 patent’s claims, examining scope, robustness, potential challenges, and its positioning within the current patent ecosystem.


Overview of the '451 Patent

The '451 patent's abstract, as publicly available, reveals that it addresses a novel method or composition designed to improve upon existing biotechnologies or pharmaceutical formulations. Its claims span a range of technical features aimed at achieving enhanced efficacy, stability, or specificity. The patent's filing date, jurisdictional reach, and assignee information—though not explicitly detailed here—are essential for contextual understanding, influencing enforceability and strategic use.


Claims Analysis

Scope and Breadth of Claims

The claims constitute the core of any patent’s enforceability. The '451 patent likely includes independent claims broadly defining the inventive concept, supported by multiple dependent claims that specify particular embodiments or technical parameters.

  • Independent Claims: Typically describe the essential structure or method, often encompassing a broad scope. If overly general, these claims may face validity challenges for lack of novelty or obviousness, especially if prior art contains similar structures or methods [1].

  • Dependent Claims: Usually narrow, these specify particular embodiments, such as specific molecular structures, dosage forms, or process conditions. These enhance patent robustness by creating fallback positions but risk being rendered invalid if the broader independent claims are not upheld.

Critical Appraisal of the Claims

  • Novelty: Assuming the claims introduce a unique combination or a new chemical entity, they likely advance beyond the prior art. However, given the rapid pace of innovation, prior reports, patents, or publications could challenge their novelty, especially if similar compounds or methods are documented.

  • Inventive Step: The claims must demonstrate an inventive step over prior art. If the patent articulates surprising technical effects—such as significantly higher bioavailability or reduced side effects—this bolsters their inventive threshold. Without such evidence, the claims risk being deemed obvious.

  • Clarity and Support: Fluid claim language, with clear definitions and consistency with the disclosure, supports enforceability. Vague or overly broad claims threaten validity; overly narrow claims may limit commercial utility.


Patent Landscape and Related IP

Prior Art and Competitor Patents

The patent’s landscape context depends heavily on:

  • Pre-existing patents covering similar compounds or therapies.
  • Recent publications elucidating comparable methods.
  • Patent families worldwide, especially in jurisdictions like the EPO, China, and Japan, where biotech innovation is vigorous.

If the '451 patent builds on or is adjacent to existing patents, it may face infringement or validity issues. For instance, if multiple patents cover similar molecular scaffolds, infringement risks escalate, necessitating detailed claim charts and freedom-to-operate analyses.

Freedom-to-Operate and Patent Thickets

The patent landscape may constitute a “patent thicket,” complicating commercialization of related products. Navigating overlapping claims requires strategic licensing, design-around approaches, or patent challenges. The '451 patent’s positioning vis-à-vis these thickets impacts its commercial leverage and defensive strength.

Litigation and IP Challenges

Given the importance of the claimed technology, the '451 patent might become a focal point for litigation or oppositions, especially if competitors deem its scope overly broad or its validity questionable. Patent challengers might invoke prior art, double patenting, or written description issues to undermine its enforceability.


Strengths and Weaknesses of the '451 Patent

Strengths

  • Innovative Scope: If the claims distinguish themselves through novel chemical structures or unique methods, they enjoy a strong footing for exclusivity.
  • Technical Advantage: Claims claiming improved efficacy or safety can provide significant commercial leverage.
  • Detailed Disclosure: Robust descriptions that support the claims enhance validity and potential for patent extensions via continuation applications.

Weaknesses

  • Potential Obviousness: If prior art renders the claimed invention predictable, patent validity may weaken.
  • Claim Breadth: Excessively broad claims are vulnerable to validity challenges or designing-around strategies.
  • Limited Commercial Utility: If the claims are narrow or highly specific, the patent's commercial value diminishes.

Implications for Stakeholders

For innovators, understanding the scope and limitations of the '451 patent informs strategic R&D and intellectual property filings. Patent owners benefit from analyzing potential infringers and defending against invalidity claims, while competitors must carefully assess overlaps in claims for licensing or designing around.


Conclusion

United States Patent 11,332,451 represents a potentially valuable asset within its technical domain, exhibiting measures of novelty and inventive step. However, its ultimate strength hinges on the precise language of its claims, the outstanding prior art landscape, and ongoing legal and technical scrutiny. Its strategic value depends on thorough patent landscape mapping, vigilant infringement monitoring, and proactive prosecution or defense strategies.


Key Takeaways

  • The scope of the '451 patent claims critically influences its enforceability and market exclusivity.
  • Alignment with the existing patent landscape determines the potential for infringement or vulnerability to validity challenges.
  • Broad claims risk invalidation; narrow claims may limit commercial applicability.
  • Continuous landscape monitoring and defense strategies are essential given the dynamic biotech patent environment.
  • Stakeholders must consider alternative IP strategies, including patenting different aspects or jurisdictions, to maximize return on investment.

FAQs

1. How does claim breadth impact the enforceability of the '451 patent?
Broader claims extend market coverage but are more susceptible to validity challenges if they encompass prior art. Narrow claims offer stronger defensibility but limit scope, necessitating strategic balance.

2. What are common challenges faced during patent prosecution for biotech inventions like the '451 patent?
Challenges include demonstrating novelty and inventive step amid extensive prior art, ensuring sufficient disclosure, and avoiding claims that are too broad or vague.

3. How can patent challenges or invalidations impact a patent like '451'?
Successful challenges can invalidate claims, rendering the patent unenforceable and diminishing its commercial value, while unsuccessful challenges reinforce its robustness.

4. What role does the patent landscape analysis play in strategic licensing?
It identifies potential infringement risks, overlapping patents, and opportunities for licensing or cross-licensing, optimizing commercial negotiations.

5. Why is continuous patent monitoring essential in biotech?
Because rapid advancements and filings can quickly affect patent validity, freedom-to-operate, and competitive positioning, ongoing monitoring safeguards strategic interests.


References

  1. [1] U.S. Patent and Trademark Office, "Subject Matter Eligibility," 37 C.F.R. § 1.801-1.809.

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Details for Patent 11,332,451

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Recordati Rare Diseases, Inc. ELSPAR asparaginase For Injection 101063 January 10, 1978 11,332,451 2040-09-16
Genentech, Inc. RITUXAN rituximab Injection 103705 November 26, 1997 11,332,451 2040-09-16
Idec Pharmaceuticals Corp. RITUXAN rituximab Injection 103737 February 19, 2002 11,332,451 2040-09-16
Janssen Biotech, Inc. REMICADE infliximab For Injection 103772 August 24, 1998 11,332,451 2040-09-16
Swedish Orphan Biovitrum Ab (publ) KINERET anakinra Injection 103950 November 14, 2001 11,332,451 2040-09-16
Novartis Pharmaceuticals Corporation COSENTYX secukinumab Injection 125504 January 21, 2015 11,332,451 2040-09-16
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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