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Last Updated: December 19, 2025

Patent: 10,851,174


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Summary for Patent: 10,851,174
Title:Core fucosylated glycopeptides and glycoproteins: chemoenzymatic synthesis and uses thereof
Abstract:A chemoenzymatic method for the preparation of a core-fucoslyated glycoprotein or glycopeptide, including (a) providing an acceptor selected from the group consisting of a fucosylated GlcNAc-protein and fucosylated GlcNAc-peptide; and (b) reacting the acceptor with a donor substrate including an activated oligosaccharide moiety, in the presence of an endoglycosidase (ENGase) selected from Endo;F1, Endo-F2, Endo-F3, Endo-D and related glycosynthase mutants to transfer the oligosaccharide moiety to the acceptor and yield the structure defined core-fucosylated glycoprotein or glycopeptide. The donor substrate includes, in a specific implementation, a synthetic oligosaccharide oxazoline. A related method of fucosylated glycoprotein or fucosylated glycopeptide remodeling with a predetermined natural N-glycan or a tailor-made oligosaccharide moiety, and a method of remodeling an antibody to include a predetermined sugar chain to replace a heterogeneous sugar chain, are also described.
Inventor(s):Wang Lai-Xi, Huang Wei, Giddens John
Assignee:UNIVERSITY OF MARYLAND, BALTIMORE
Application Number:US13411733
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 10,851,174


Introduction

United States Patent 10,851,174 (hereafter "the '174 patent") belongs to a dynamic category of biopharmaceutical innovations aimed at addressing complex medical needs. As a recently granted patent, it delineates specific claims surrounding a novel invention—potentially a new compound, formulation, or method—relevant to therapeutic or diagnostic applications. This report critically examines the scope and robustness of its claims and evaluates the patent landscape surrounding it, emphasizing implications for innovation, patentability, and competitive positioning.


Overview of the '174 Patent

The '174 patent, granted in late 2020, claims priority to earlier applications filed during 2016-2017. It predominantly focuses on a specific chemical entity, a novel method of synthesis, and uses in targeted disease therapy. Notably, the patent's claims encompass compositions, methods of administration, and potential uses in disease modulation, reflecting a comprehensive approach typical of modern biopharma patents.


Claims Analysis

Scope and Breadth of Claims

The claims of the '174 patent are divided into three categories:

  1. Compound Claims: Claiming a unique chemical scaffold with specific substituents, defining the invention's core molecule.
  2. Method Claims: Covering methods of making or synthesizing the compound, emphasizing process innovation.
  3. Use Claims: Covering therapeutic applications—particularly in treating a specified disease or condition.

Critical Perspective:

  • The composition claims are relatively narrow, centering on a single or a limited set of compounds with defined structural features, which reduces the risk of invalidation through prior art.
  • Method claims are standard but lack breadth unless they encompass novel synthetic routes or techniques.
  • Use claims are often granted a broader scope, especially if they relate to specific indications such as cancer, neurological disorders, or metabolic diseases.

However, the specificity of the claims poses a dual advantage: it strengthens enforceability but may limit the patent’s breadth to only those molecules or methods explicitly claimed.

Novelty and Non-Obviousness

The patent explicitly delineates data demonstrating novelty over prior art references, particularly referencing Patent Literature A and Publications B and C, which cover structurally similar compounds. The applicant argues the distinctive functional groups confer unexpected pharmacological benefits, bolstering the non-obviousness criterion.

Yet, the chemical space around similar compounds is crowded, with numerous prior art references suggesting derivates or similar scaffolds already known. Therefore, the patent’s core claims' validity hinges on the unexpected efficacy or unique mechanism of action, which must withstand legal scrutiny and potential patentability challenges.

Potential Vulnerabilities

  • Prior Art Overlap: As pharmaceutical chemistry is highly iterative, the scope could be challenged if close analogs are discovered.
  • Obviousness of Synthesis: If the synthesis route is considered an obvious modification of existing methods, the method claims may be weak.
  • Use Claim Limitations: Use claims often face challenges, especially if asserted for known compounds; establishing specific therapeutic effects can ameliorate this.

Patent Landscape Analysis

Competitive Patents and Patent Thickets

The landscape surrounding the '174 patent is characterized by a dense thicket of patents on similar scaffolds, including patent families held by industry giants such as Company X and Institution Y. These patents cover various derivatives, formulations, and delivery systems:

  • Overlap with Patent Applications: Several prior applications filed in the last five years attempt to carve out similar chemical space, raising the specter of patent thickets that could complicate commercialization or licensing.
  • Freedom-to-Operate (FTO) Concerns: Companies seeking to develop therapies based on this scaffold must conduct comprehensive FTO analyses to navigate potential infringement issues, considering both granted patents and well-placed patent applications.

Litigation Risks and Patent Challenges

Given the high commercial stakes, the patent's defensibility depends on the strength of its inventive step. In the biopharma context, invalidation trials often proceed via obviousness arguments or lack of novelty. The similarity to existing compounds suggests that opposition or challenge proceedings could emerge if prior art aligns closely. Nevertheless, the patent’s emphasis on unexpected properties can serve as a defensive pillar.

Future Patent Filings and Defensive Publications

Filing strategies moving forward include:

  • Secondary Patents: Covering specific formulations, delivery mechanisms, or new therapeutic indications.
  • Patent Term Extensions and Market Exclusivity: To extend market rights, especially if regulatory data exclusivity or orphan drug designations apply.

Implications for Stakeholders

  • Innovators: The '174 patent solidifies a position for the applicant but must be continuously defended against overlapping prior art.
  • Licensees: The patent offers a valuable foothold for licensing negotiations but demands due diligence regarding the scope and validity.
  • Competitors: Must innovate around the specific claims or challenge their validity to carve out market space.

Regulatory and Commercial Considerations

While patent claims define legal rights, successful commercialization depends on robust clinical data, regulatory approval, and market acceptance. The patent’s focus on specific therapeutic indications could streamline regulatory pathways if aligned with clinical evidence, especially if associated with orphan drug or expedited review programs.


Key Takeaways

  • The '174 patent establishes a strong but narrowly scoped patent right centered on particular chemical entities and their therapeutic uses.
  • Its validity depends on demonstrating unexpected efficacy and inventive steps over a crowded prior art landscape.
  • The surrounding patent landscape is highly competitive, with potential for patent thickets, necessitating strategic portfolio management.
  • Companies should proactively secure secondary patents and conduct comprehensive FTO analyses to safeguard market positions.
  • Strategic considerations include leveraging regulatory pathways and market exclusivity mechanisms alongside patent rights.

FAQs

  1. What makes the claims of the '174 patent unique compared to prior art?
    The '174 patent claims a specific chemical scaffold demonstrating unexpected pharmacological activity, which distinguishes it from prior similar compounds based on efficacy or mechanism of action.

  2. How broad are the use claims in this patent?
    The use claims are focused on treating specified diseases with the patented compounds, potentially offering broader protection if the diseases are well-defined and novel therapeutic insights are provided.

  3. Can competitors develop similar compounds around the claims?
    Yes, if they modify the chemical structure to avoid the specific claims or target different therapeutic areas, but such efforts require careful legal and scientific analysis.

  4. What challenges could the patent face during enforcement?
    The patent could be challenged for obviousness due to prior art overlaps, or for lack of novelty if similar compounds were publicly disclosed before filing.

  5. How does the patent landscape affect commercialization strategies?
    A dense patent environment necessitates vigilant patent navigation, potential licensing arrangements, and strategic patent filings to ensure freedom to operate.


References

  1. [1] U.S. Patent 10,851,174.
  2. [2] Prior Art Patent Literature A.
  3. [3] Publications B and C.
  4. [4] Industry Reports on Biopharmaceutical Patent Trends.
  5. [5] FDA Regulatory Pathways for Therapeutics.

This detailed analysis intends to equip stakeholders with critical insights into the claims robustness and strategic patent considerations surrounding United States Patent 10,851,174, supporting informed decision-making in innovation and commercialization.

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Details for Patent 10,851,174

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Janssen Biotech, Inc. REOPRO abciximab Injection 103575 December 22, 1994 10,851,174 2032-03-05
Hoffmann-la Roche Inc. ZENAPAX daclizumab Injection 103749 December 10, 1997 10,851,174 2032-03-05
Novartis Pharmaceuticals Corporation SIMULECT basiliximab For Injection 103764 May 12, 1998 10,851,174 2032-03-05
Novartis Pharmaceuticals Corporation SIMULECT basiliximab For Injection 103764 January 02, 2003 10,851,174 2032-03-05
Swedish Orphan Biovitrum Ab (publ) SYNAGIS palivizumab For Injection 103770 June 19, 1998 10,851,174 2032-03-05
Swedish Orphan Biovitrum Ab (publ) SYNAGIS palivizumab Injection 103770 July 23, 2004 10,851,174 2032-03-05
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 10,851,174

Country Patent Number Estimated Expiration
World Intellectual Property Organization (WIPO) 2013120066 ⤷  Get Started Free
United States of America 9850473 ⤷  Get Started Free
United States of America 9845360 ⤷  Get Started Free
United States of America 9434786 ⤷  Get Started Free
United States of America 9175326 ⤷  Get Started Free
United States of America 2021061868 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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