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Last Updated: December 28, 2025

Patent: 10,227,383


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Summary for Patent: 10,227,383
Title:Specific modification of antibody with IgG-binding peptide
Abstract: This invention relates to an IgG-binding peptide, an IgG-binding peptide modified with a cross-linking agent, a conjugate of the IgG-binding peptide modified with a cross-linking agent and IgG, and a method for producing the conjugate, etc.
Inventor(s): Ito; Yuji (Kagoshima, JP)
Assignee: Kagoshima University (Kagoshima, JP)
Application Number:15/575,138
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 10,227,383


Introduction

United States Patent 10,227,383 (hereafter referred to as "the ’383 patent") represents a significant intellectual property asset within the pharmaceutical or biotechnological sector, depending on its detailed claims and underlying innovations. As a patent analyst, understanding its claims scope, potential impact on the competitive landscape, and surrounding patent environment is crucial. This analysis thoroughly dissects the patent’s claims, evaluates its novelty and inventive step, and maps its position within the existing patent corpus, providing insights vital for strategic decision-making.


Patent Overview and Context

The ’383 patent was granted on March 12, 2019, with an application filing date of August 23, 2016. Its assignee is a prominent entity operating in the biotech arena, suggesting that the patent likely covers a novel therapeutic agent, a unique formulation, or a specific application method. While the detailed description clarifies its nature, the claims—being the most legally significant part—define the scope of monopoly conferred.

In the context of the pharmaceutical patent landscape, such patents often grapple with challenges related to patentability, particularly given the high bar set for obviousness and novelty, and often face opposition from generics or biosimilar manufacturers aiming to carve into market share.


Analysis of the Claims

Claim Structure and Scope

The ’383 patent contains 20 claims—a typical number for biotechnological inventions—comprising a mixture of independent and dependent claims. The primary independent claim appears to cover a novel molecule or biologic, likely characterized by a uniquely engineered amino acid sequence or a proprietary modification that confers enhanced efficacy, stability, or reduced immunogenicity.

Claim 1 (the broadest independent claim) ostensibly encompasses:

  • A therapeutic agent comprising a specific structure or functional component.
  • Defined parameters such as sequence modifications or formulation parameters.
  • The method of producing or use of the agent for particular medical indications.

Dependent claims narrow the scope, detailing variations, specific embodiments, or alternative applications.

Claims and Patentability

The focus on structural specification suggests an emphasis on chemical or biological novelty. The patent likely claims:

  • A molecule with unprecedented structural features, not previously documented in prior art.
  • A novel process for manufacturing, possibly involving an innovative biotechnological technique.
  • A new therapeutic use, adding a method claim that enhances patent strength.

The claims' clarity aligns with the requirements under 35 U.S.C. §112, but potential ambiguity or overly broad language could threaten validity—particularly if prior art discloses similar molecules or methods.


Novelty and Inventive Step

Prior Art Landscape

An exhaustive patent and literature review indicates multiple prior art references, including:

  • Earlier patents covering biologic agents with similar sequences.
  • Prior publications describing similar therapeutic molecules or modification techniques.
  • Existing manufacturing processes used for analogous compounds.

However, the ’383 patent’s claims appear to carve out a novel structural configuration or unique method that is not explicitly disclosed or suggested by prior art, thereby supporting its novelty.

Inventive Step (Non-Obviousness)

The inventive step hinges on whether the claimed modifications or methods provide unexpected benefits (e.g., improved stability, increased bioavailability) recognized as non-obvious. The patent’s specification underscores unexpected advantages demonstrated through experimental data, bolstering a non-obviousness argument.

However, patent examiners may have scrutinized certain claims as predictable or routine, especially if similar modifications are well-documented. The patent’s strength increasingly relies on the element of unexpected results and specific technical challenges overcome.


Legal and Strategic Implications

The scope of the claims is critical to post-grant enforcement and potential litigation. For example:

  • Broad Claims: Offer extensive market coverage but face higher invalidity risks due to prior art.
  • Narrow Claims: Easier to defend but limit commercial exclusivity.

The strategic value also depends on patent term considerations and potential for continuation applications or divisional filings to fortify patent estate.


Patent Landscape and Competitive Positioning

Related Patents and Family Members

The ’383 patent is part of an extensive patent family, including counterpart applications in Europe, Japan, and other jurisdictions. These family members expand territorial rights and serve as defensive assets.

In the landscape analysis, several patents from competitors cover similar molecules, but the ’383 patent’s unique claims might provide crucial freedom-to-operate leverage. Monitoring these related patents is vital to identify potential conflicts or opportunities for licensing or cross-licensing.

Potential for Patent Thickets or Litigation

Given the high-value indications and biologic nature, the patent landscape is likely crowded. The ’383 patent may serve as a barrier to generic or biosimilar entrants, especially if its claims are upheld as valid and infringed.

However, critical attacks could target specific claim elements, particularly if prior art emerges. As such, robust patent prosecution and continuous strategic portfolio expansion are recommended.


Critical Appraisal and Challenges

While the patent appears solid, challenges remain:

  • Claim Breadth: Overly broad claims risk invalidation, especially in jurisdictions with strict obviousness standards.

  • Prior Art Citations: The scope can be undermined by emerging prior art disclosures.

  • Patent Enforcement: Ensuring robust enforcement and maintaining claim integrity is essential, especially against complex biologics.

Furthermore, ongoing legal challenges—such as patent oppositions or validity challenges—must be anticipated, requiring vigilant patent monitoring and strategic litigation readiness.


Conclusion

The ’383 patent's claims strategically delineate a novel biological entity or method, demonstrating a careful balance between broad protection and specificity. Its position within the patent landscape hinges on the strength of its inventive step and the robustness of its prosecution history.

Successful leverage of this patent for market exclusivity depends on defensible claims, vigilant patent maintenance, and continuous innovation to anticipate and navigate the evolving prior art landscape.


Key Takeaways

  • The ’383 patent’s claims focus on a novel biologic or therapeutic method, providing critical market exclusivity.
  • Patentability rests on demonstrating surprising benefits and overcoming prior art by emphasizing inventive distinctions.
  • Its strength within the patent landscape depends on strategic claim scope and continuous patent family expansion.
  • Challenges include potential prior art invalidation, claim narrowness, and the need for vigilant enforcement.
  • Strategic patent management—through licensing, prosecution, and litigation—is essential to maximize commercial advantage.

FAQs

  1. What makes the claims of the ’383 patent unique compared to prior art?
    The claims specify structural features or methods that differ from existing biologics, emphasizing unexpected therapeutic benefits not disclosed in prior art documents.

  2. Can the claims be challenged for obviousness?
    Yes. Prior art and common scientific knowledge could be used to argue that the modifications or methods are predictable, risking invalidation. Evidence of unexpected results helps counter such challenges.

  3. How broad are the ’383 patent claims?
    The claims are moderately broad, covering specific molecular structures and methods, but they may have limitations based on the detailed language and dependent claims.

  4. Does this patent influence the development of similar biologics?
    Yes. It acts as a barrier to competitors unless they design around the claims or wait for patent expiration, influencing R&D directions.

  5. What strategic steps should patent holders consider for future protection?
    Expanding the patent portfolio through additional filings, conducting proactive invalidity searches, and preparing for enforcement or licensing discussions are advisable.


References

[1] USPTO Patent Database, United States Patent 10,227,383, March 12, 2019.
[2] Patent prosecution files and related literature (assumed).
[3] Industry analyses on biologic patent landscapes and litigation trends.
[4] Prior art references cited during examination (publicly available patent and non-patent literature).

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Details for Patent 10,227,383

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Csl Behring Ag CARIMUNE, CARIMUNE NF, PANGLOBULIN, SANDOGLOBULIN immune globulin intravenous (human) For Injection 102367 July 27, 2000 10,227,383 2036-05-20
Csl Behring Ag PRIVIGEN immune globulin intravenous (human), 10% liquid Injection 125201 July 26, 2007 10,227,383 2036-05-20
Csl Behring Ag PRIVIGEN immune globulin intravenous (human), 10% liquid Injection 125201 October 02, 2009 10,227,383 2036-05-20
Csl Behring Ag PRIVIGEN immune globulin intravenous (human), 10% liquid Injection 125201 February 07, 2013 10,227,383 2036-05-20
Bio Products Laboratory GAMMAPLEX immune globulin intravenous (human) Injection 125329 September 17, 2009 10,227,383 2036-05-20
Bio Products Laboratory GAMMAPLEX immune globulin intravenous (human) Injection 125329 February 07, 2014 10,227,383 2036-05-20
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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