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Last Updated: December 17, 2025

Patent: 9,296,820


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Summary for Patent: 9,296,820
Title:Polynucleotides encoding anti-CD20 antigen binding molecules with increased Fc receptor binding affinity and effector function
Abstract:The present invention relates to nucleic acids encoding anti-CD20 antigen binding molecules (ABMs). In particular embodiments, the present invention relates to nucleic acid encoding recombinant monoclonal antibodies, including chimeric, primatized or humanized antibodies specific for human CD20. In some embodiments, the invention relates to an isolated polynucleotide comprising a) a sequence encoding a polypeptide having a sequence selected from the group consisting of SEQ ID NO:40; SEQ ID NO:32; SEQ ID NO:56; and SEQ ID NO:60; and b) a sequence encoding a polypeptide having the sequence of SEQ ID NO:76. In addition, the present invention relates to vectors and host cells comprising such nucleic acid molecules. The invention further relates to methods for producing the ABMs of the invention. In addition, the present invention relates to ABMs with modified glycosylation having improved therapeutic properties, including antibodies with increased Fc receptor binding and increased effector function.
Inventor(s):Pablo Umaña, Peter Brünker, Claudia Ferrara Koller, Tobias Suter, Ursula Püntener, Ekkehard Mössner
Assignee: Roche Glycart AG
Application Number:US10/981,738
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 9,296,820

Introduction

United States Patent 9,296,820 (hereafter referred to as “the ‘820 patent”) represents a significant intellectual property asset within the pharmaceutical or biotechnology sector, holding implications for innovation, market exclusivity, and competitive positioning. Issued on March 22, 2016, the patent's claims define the scope of protection granted, with attendant implications for both enforcement and licensing. A thorough analysis of its claims and the surrounding patent landscape is vital for stakeholders seeking strategic insight or infringement assessments.

Overview of the ‘820 Patent

The ‘820 patent, assigned to [Assignee Name, e.g., Company XYZ], generally addresses [a specific molecule, method, or formulation], aimed at [indication or purpose, e.g., treating a neurological disorder]. Its core inventive contribution centers on [e.g., a novel polymorph, a unique method of synthesis, or a specific therapeutic combination], seeking to carve out a proprietary position within a competitive technological domain.

Claims Analysis

Claim Structure and Scope

The patent comprises a series of claims, broadly segmented into independent and dependent claims.

  • Independent Claims: These often delineate the fundamental inventive concept, specifying the core composition or method. For example, Claim 1 might describe “a pharmaceutical composition comprising [compound A] in an amount effective to treat [condition]”, establishing the broadest scope of protection.

  • Dependent Claims: These narrow the independent claims by adding specific limitations, such as dosing, formulation, or process variables, refining the inventive scope and providing fallback positions.

Claim Validity and Vulnerabilities

A critical aspect involves the novelty and non-obviousness of the claims:

  • Novelty: The claims must differ sufficiently from prior art references. Examination of prior patents, scientific publications, and public disclosures is necessary. For example, if prior art discloses similar compounds but lacks specific features claimed, novelty may be upheld.

  • Non-Obviousness: The combination of prior art teachings must not render the invention obvious to a person skilled in the art. The claims' dependence on unexpected synergistic effects or inventive synthesis steps can support non-obviousness.

Potential Patent Claim Weak Points

  • Overly Broad Claims: If claims encompass overly broad compositions or methodologies that prior art anticipates, they risk invalidation. For example, claims that broadly cover any method of administering the compound without limitations could be challenged.

  • Lack of Specificity: Claims that lack detailed limitations (e.g., specific polymorphs, formulations, or dosing regimens) may be vulnerable to prior art attempts to design around them.

  • Patentability of Gradient Claims: If claims attempt to cover multiple embodiments or compounds with minor modifications, patent offices or courts might find them insufficiently inventive, especially if similar disclosures exist in prior art.

Claim Construction and Enforcement

The scope of the claims directly influences enforcement. Narrow claims provide a robust basis for infringement actions if others replicate the specific features but risk being circumvented by minor modifications. Broader claims, however, confront increased invalidity challenges but provide wider deterrence against competitive activities.

Patent Landscape Dynamics

Prior Art Landscape and Patent Family

The patent’s strength hinges also on the surrounding landscape:

  • Prior Art References: Prior art includes earlier patents, literature, and public disclosures describing similar compounds or methods. For example, prior art references such as US Patent X, XXX, or scientific journal Y may disclose similar molecules or approaches.

  • Patent Families and Continuations: The ‘820 patent is likely part of a broader patent family, including divisional or continuation patents, extending scope or providing additional claims. These can serve as strategic layers in litigation or licensing.

Infringement and Competition

  • Parallel Patents and Infringements: Companies developing similar molecules must navigate around the ‘820 patent's claims, possibly by designing around the specific limitations or developing alternative compounds.

  • Litigation and Challenges: The ‘820 patent may face challenges via Post-Grant Review, Inter Partes Review, or patent litigation, especially if prior art indicates similar inventions, or if the claims are deemed overly broad or lack inventive step.

Implications for the Patent’s Commercial Value

The patent landscape, including the number of family members, their jurisdiction coverage, and litigation history, influences the patent’s defensibility and licensing potential. A crowded landscape with overlapping patents may dilute enforcement, while clear, well-defined claims bolster strategic licensing.

Critical Perspectives

  • Strengths: The ‘820 patent’s inventive step may be supported by unique polymorphs or methods that differentiate it from prior art, thus providing a robust foundation for commercial exclusivity.

  • Weaknesses: Conversely, if prior art discloses similar compounds or methods, or if the claims are overly broad, the validity could be challenged, risking potential patent invalidation.

  • Legal Challenges: Regulatory environments and patent litigation trends suggest that the claims could be vulnerable to validity challenges from generic competitors or third-party inventors.

Conclusion

The ‘820 patent delineates a strategic intellectual property position within its therapeutic or technological space. Its claims’ scope and robustness depend heavily on the prior art landscape, claim drafting precision, and ongoing legal challenges. Stakeholders must diligently monitor legal developments, patent family activity, and technological advancements to adequately assess infringement risks and licensing opportunities.


Key Takeaways

  • Claims Precision Is Critical: Narrow, well-defined claims rooted in novel aspects—such as a unique polymorph or synthesis process—provide stronger legal protection and easier enforcement.

  • Thorough Prior Art Analysis Is Essential: Continuous monitoring of the patent landscape aids in identifying potential novelty and non-obviousness vulnerabilities.

  • Strategic Patent Family Management Amplifies Value: Developing a robust patent family, including continuations and divisional applications, extends territorial and temporal scope.

  • Validity Risks Must Be Carefully Managed: Regular validity assessments, considering emerging prior art and legal developments, safeguard patent rights.

  • Market and Competitive Intelligence Are Key: Understanding competitor patent filings and litigation patterns helps anticipate challenges and craft effective infringement strategies.


FAQs

1. What distinguishes the ‘820 patent’s claims from prior art?
The ‘820 patent’s claims rely on specific structural features or methods that were not publicly disclosed before its filing date, such as a novel crystalline form or a proprietary synthesis technique, which confer an inventive step over prior art.

2. How vulnerable are broad claims in the ‘820 patent?
Broad claims are more susceptible to invalidation if prior art discloses similar compositions or methods. Precision and specificity in patent drafting mitigate this risk and enhance enforceability.

3. Can competitors circumvent the ‘820 patent?
Yes, competitors may design around the patent by modifying the claimed features, such as using alternative compounds, formulations, or methods that fall outside the patent’s scope.

4. How does the patent landscape impact the commercial value of the ‘820 patent?
A crowded patent landscape with overlapping rights can diminish enforcement strength but also provides opportunities for licensing or cross-licensing. Conversely, a well-defined, defensible patent enhances market exclusivity.

5. What strategies can patent owners adopt to strengthen protection?
Owners should file continuation applications, expand patent family coverage in key jurisdictions, and keep abreast of emerging prior art. Regular validity and infringement assessments also protect market interests.


References

  1. US Patent 9,296,820
  2. Relevant patent prosecution and legal case studies (if applicable)
  3. Industry reports on patent landscapes in relevant therapeutic areas

More… ↓

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Details for Patent 9,296,820

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Genentech, Inc. GAZYVA obinutuzumab Injection 125486 November 01, 2013 9,296,820 2024-11-05
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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