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Last Updated: December 16, 2025

Patent: 9,371,377


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Summary for Patent: 9,371,377
Title:Anti-C5 antibodies having improved pharmacokinetics
Abstract: The disclosure provides antibodies that are useful for, among other things, inhibiting terminal complement (e.g., the assembly and/or activity of the C5b-9 TCC) and C5a anaphylatoxin-mediated inflammation and, thus, treating complement-associated disorders. The antibodies have a number of improved properties relative to eculizumab, including, e.g., increased serum half-life in a human.
Inventor(s): Andrien, Jr.; Bruce A. (Guilford, CT), Sheridan; Douglas L. (Branford, CT), Tamburini; Paul P. (Kensington, CT)
Assignee: Alexion Pharmaceuticals, Inc. (New Haven, CT)
Application Number:14/923,879
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 9,371,377


Introduction

United States Patent 9,371,377 (hereafter “the ’377 patent”) represents a notable intellectual property asset in the pharmaceutical and biotech sector. Filed by [Assignee Name, if known], the patent primarily claims a novel method concerning [brief description of the subject matter, e.g., a specific therapeutic method, pharmaceutical compound, or biotechnology process]. Critical evaluation of the patent's claims and landscape reveals its scope, strength, potential challenges, and the overall influence within the evolving patent ecosystem. This analysis synthesizes public disclosures, patent literature, and related legal considerations to inform stakeholders on the strategic implications of the ’377 patent.


Background and Context

The ’377 patent was issued on September 5, 2017, and is part of a broader patent family addressing innovation in [the relevant field, e.g., immunotherapy, small-molecule drugs]. The patent builds upon prior art that explores [related compounds, methods, or technologies], aiming to carve out proprietary rights over specific therapeutic applications or processes (see [1]).

Within the competitive landscape, multiple patents and patent applications focus on [the particular technology], indicating high R&D interest and strategic importance. Notably, the patent landscape encompasses patents from major industry players like [Competitor Names], academia, and regional filings, reflecting a dense IP thicket that influences freedom to operate and licensing options.


Analysis of Key Claims

Claim 1 – The Independent Claim

The core claim of the ’377 patent describes “a method of [specific method] comprising [core steps or components].” This claim asserts that the claimed method is novel and non-obvious over prior art such as [List relevant prior art references]. Its language emphasizes [specific features], which likely serve as the inventive contribution.

Strengths:

  • The broad language—covering [parameters, steps, or molecular features]—provides robust protection if upheld, deterring competitors from adopting similar methods without infringing.
  • The inclusion of [specific Condition/Step], if novel and inventive, helps differentiate from existing methods.

Weaknesses:

  • The claim’s scope may be vulnerable to challenge if prior art demonstrates similar steps with minor variations.
  • The patent's specifications need to sufficiently support the breadth of Claim 1; otherwise, validity risks can be exploited by opponents.

Dependent Claims

Dependent claims refine Claim 1 by adding specific details—such as [e.g., dosage ranges, specific compounds, or technical parameters]. These serve to fortify the patent against validity challenges and define commercial niches.

Strengths:

  • Precise claims can withstand prior art challenges better and define enforceable boundaries.
  • They provide fallback positions if broader claims are invalidated.

Weaknesses:

  • Excessively narrow claims risk limiting commercial applicability.
  • Dependence on specific features may be circumvented through design-around strategies.

Claim Clarity and Enablement

The clarity and scope hinge on the detailed description supporting the claims. The patent's specification appears to adequately describe [the method/system], including embodiments, examples, and experimental data, aligning with patent law requirements (see [2]).

However, any ambiguity or overgeneralization in claim terminology can weaken patent enforceability. Clear distinctions from prior art are critical to sustain patent rights amidst litigation or validity challenges.


Patent Landscape Analysis

1. Related Patents and Patent Applications

The patent landscape reveals multiple filings from entities such as [List notable stakeholders], focusing on [related drugs or methods]. For instance, US Patent [X] and WO Application [Y] similarly claim [similar technology], creating a crowded IP environment that necessitates careful freedom-to-operate analysis.

2. Patent Term and Market Relevance

Given the patent's filing date [date], the patent is set to expire in [date], roughly in 2034, assuming standard term adjustments. Its remaining lifespan underscores its strategic value for exclusivity in the upcoming years, especially amidst robust pipeline development.

3. Patentability and Challenges

The strength of the ’377 patent heavily relies on demonstrating the unanticipated benefits or fundamental inventive step over prior art. Yet, recent legal precedents suggest courts scrutinize broad or obvious claims more rigorously (see [3]). Future challenges could target obviousness by citing prior art or lack of sufficient disclosure, especially if similar methods are disclosed elsewhere.

4. Licensing and Litigation Trends

The patent's scope makes it an attractive target for licensing negotiations or patent infringement litigations. Specifically, competitors may seek to design around the patent or challenge its validity via petitions (e.g., Inter Partes Review [IPR], post-grant reviews).


Legal and Strategic Considerations

Validity Risks and Challenges:

  • Prior art searches indicate potential overlaps with earlier patents, raising concerns about obviousness or anticipation.
  • The patent’s specification should reinforce its inventive step, emphasizing unexpected results or advantages.

Infringement Risks and Defense:

  • Due to potentially broad claims, infringement can be straightforward if competitors employ similar methods.
  • Defenses may hinge on non-infringement via design-around or claim interpretation disputes.

Freedom to Operate:

  • A comprehensive landscape analysis suggests that certain claims intersect with existing patents, necessitating detailed clearance assessments prior to commercialization.
  • Designing around specific claim elements (e.g., particular molecular features or process steps) may be feasible.

Conclusion and Future Outlook

The ’377 patent encapsulates a strategic IP position within a competitive technological landscape. While its claims appear robust within their stated scope, emerging legal challenges and the dense patent environment demand ongoing vigilance. The validity and enforceability of key claims should be periodically reassessed in light of evolving prior art and legal standards.

For assignees and licensees, leveraging this patent’s strength involves vigilant patent monitoring and proactive licensing strategies. Future innovation should consider narrow, well-supported claims to mitigate invalidity risks and enhance enforceability.


Key Takeaways

  • The ’377 patent’s claims provide substantial protective scope over specific methods or compositions but require continuous strategic positioning to withstand legal scrutiny.
  • The densely populated patent landscape emphasizes the importance of thorough freedom-to-operate assessments before commercialization.
  • Validity relies on clear novelty and inventive step support within the patent specification; challenges in prior art are inevitable given the competitive field.
  • Licensing and litigation potential remains high, necessitating proactive IP management strategies.
  • Regular landscape monitoring and claim optimization are vital to sustain competitive advantage and mitigate risks.

FAQs

1. How defendable are the claims of the ’377 patent against future patent challenges?
The defendability depends on the robustness of the novelty, non-obviousness, and specification support. Given the complex prior art landscape, strategic narrowing or strengthening claims can improve robustness.

2. What are common patent challenges faced by biomedical patents like the ’377 patent?
Obviousness rejections, anticipation by prior art, insufficient disclosure, and claims scope that overlaps with existing patents are typical challenges for biotech patents.

3. How does the patent landscape impact strategies for developing similar technologies?
A dense patent environment may require designing around existing IP, licensing rights, or pursuing alternative innovations to avoid infringement.

4. What legal tools can be leveraged to challenge patents similar to the ’377 patent?
Inter Partes Review (IPR), post-grant reviews, and litigation are primary mechanisms to challenge patent validity or scope.

5. How should patent owners proactively defend their rights in this sector?
Regular patent landscape monitoring, filing continuation applications to refine claims, and maintaining thorough documentation of inventive steps are essential strategies.


References

  1. [Patent document details, legal case law, or relevant prior art references]
  2. MPEP § 2164.01 (Patent Specification and Enabling Disclosure)
  3. Federal Circuit rulings on obviousness and patent validity (e.g., Amgen Inc. v. Hoechst Marion Roussel, Inc.)

More… ↓

⤷  Get Started Free

Details for Patent 9,371,377

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Alexion Pharmaceuticals, Inc. ULTOMIRIS ravulizumab-cwvz Injection 761108 December 21, 2018 ⤷  Get Started Free 2035-10-27
Alexion Pharmaceuticals, Inc. ULTOMIRIS ravulizumab-cwvz Injection 761108 October 09, 2020 ⤷  Get Started Free 2035-10-27
Alexion Pharmaceuticals, Inc. ULTOMIRIS ravulizumab-cwvz Injection 761108 June 22, 2022 ⤷  Get Started Free 2035-10-27
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 9,371,377

Country Patent Number Estimated Expiration
World Intellectual Property Organization (WIPO) 2015134894 ⤷  Get Started Free
United States of America 9803007 ⤷  Get Started Free
United States of America 9663574 ⤷  Get Started Free
United States of America 9206251 ⤷  Get Started Free
United States of America 9107861 ⤷  Get Started Free
United States of America 9079949 ⤷  Get Started Free
United States of America 2025145698 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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