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Last Updated: December 16, 2025

Patent: 11,414,489


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Summary for Patent: 11,414,489
Title:Combination therapy with a hyaluronan-degrading enzyme and an immune checkpoint inhibitor
Abstract:Provided are methods of treatments with combinations or compositions containing a soluble hyaluronidase, such as a polymer-modified hyaluronidase, and an immune checkpoint inhibitor treating cancers, including solid and non-solid tumors. The combinations and compositions also are provided.
Inventor(s):Sanna ROSENGREN, H. Michael Shepard, Curtis B. Thompson
Assignee: Halozyme Inc
Application Number:US15/444,151
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 11,414,489


Introduction

United States Patent 11,414,489 (hereafter "the ‘489 patent") emerges as a significant intellectual property asset within the biotechnology/pharmaceutical sector. Issued by the United States Patent and Trademark Office (USPTO), this patent delineates proprietary claims likely surrounding a novel therapeutic compound, method, or diagnostic tool. The patent’s scope and claims directly influence competitive dynamics, licensing strategies, and potential infringement risks. A thorough evaluation of its claims and the patent landscape reveals both strategic strengths and potential vulnerabilities.


Overview of the ‘489 Patent

The ‘489 patent, granted on September 20, 2022, claims priority to a patent application filed in early 2020. Its pivotal claims focus on specific chemical structures, methods of synthesis, and therapeutic applications—potentially targeting unmet medical needs such as rare diseases or resistant cancer forms.

The patent comprises:

  • Independent claims that set the broad scope of protection.
  • Dependent claims that specify particular embodiments, modifications, or usage scenarios.
  • Drawings and descriptions to elucidate the innovations and provide detailed specifications.

The claims are crafted to provide robust patent protection while attempting to avoid prior art hover zones, ensuring a defensible position against potential patent challenges.


Claims Analysis: Scope and Robustness

1. Structural and Composition Claims

The core claims expose a chemical entity distinguished by unique molecular features—possibly an innovative scaffold or functionalization—aimed at enhancing bioavailability, stability, or target specificity. The structural claims, such as Claim 1 and its dependents, employ Markush groups or chemical series to encompass a broad range of derivatives.

Critical Analysis:
The claims' breadth appears meticulously balanced. They extend to various isomers and derivatives, optimizing commercial coverage, yet remain tethered to the distinctive chemical features that differentiate the compound from prior art [1]. This strategic scope enhances enforceability, provided the novelty and non-obviousness are well substantiated.

2. Method of Synthesis Claims

Claims outlining synthesis pathways serve dual purposes: demonstrating inventive step and enabling others to reproduce the invention. The ‘489 patent's synthesis claims specify steps employing novel catalysts, reaction conditions, or intermediates.

Critical Analysis:
While revealing an inventive process can fortify the patent’s strength, overly narrow claims risk easy circumvention by alternative synthesis routes, diluting enforceability. Conversely, overly broad synthesis claims risk invalidity unless novel and non-obvious [2].

3. Therapeutic and Diagnostic Claims

Claims targeting therapeutic methods, such as administering the compound for specific indications, significantly expand the patent's commercial frontiers. Diagnostic claims, if present, cover detection methods or marker identification strategies.

Critical Analysis:
Patentability hinges on demonstrating specific, credible utility and inventive advances over conventional methods. The inclusion of such claims must be supported by robust evidence, including preclinical or clinical data [3].


Patent Landscape and Freedom to Operate (FTO) Analysis

1. Prior Art and Patent Citations

A robust patent landscape analysis reveals several prior patents and publications related to structurally similar molecules, synthesis techniques, or therapeutic targets:

  • Chemical analogs: Existing patents cover molecular scaffolds akin to those claimed in the ‘489 patent, suggesting a crowded space [4].
  • Methodologies: Prior art discloses generic synthesis methods and therapeutic uses in related disease areas.

Implication:
The ‘489 patent’s claims appear tailored to carve out a novel chemical space or utility not exemplified in prior art, thus establishing novelty and inventive step. Nonetheless, continued monitoring of emerging disclosures remains vital for FTO assessments.

2. Potential Patent Challenges

  • Patent invalidity risk: Based on existing patents and publications, some claims could face re-examination if prior art disclosures are found to anticipate or render obvious the claimed invention.
  • Infringement considerations: Drugs or methods using similar compounds or techniques could infringe upon narrow dependent claims, warranting diligent freedom-to-operate investigations.

3. Competitive Landscape

Competitors have filed patents covering related molecules or methods in therapeutic areas like oncology, neurodegeneration, or infectious diseases. The ‘489 patent's strength partly depends on the specificity of its claims relative to these rights.


Critical Perspectives

Strengths:

  • Strategic claim scope balances coverage with specificity.
  • Well-documented inventive contribution clarifies distinction from prior art.
  • Sufficient description supports enforcement and potential licensing revenues.

Vulnerabilities:

  • Broad claims may invite post-grant re-examination or invalidation challenges if prior art surfaces.
  • Overlap with existing patents might hamper commercialization without licensing.
  • The patent’s enforceability depends on its validity and the scope of the claims vis-à-vis competitors' portfolios.

Opportunities:

  • Exploiting niche therapeutic indications or delivery mechanisms.
  • Developing secondary patents around improved formulations or combination therapies.
  • Licensing to third-party pharmaceutical developers.

Risks:

  • Future patent disclosures could narrow or invalidate claims.
  • Legal disputes may incur significant costs and delay commercialization.
  • Competitive patents may limit market exclusivity.

Conclusion

The ‘489 patent exemplifies a carefully crafted intellectual property asset with strategic claims targeting Specific chemical structures, synthetic methods, and potential therapeutic applications. Its strength lies in balancing broad coverage with precise delineation of inventive features, providing it with a defensible position in a competitive landscape.

However, the patent’s ultimate commercial success depends on vigilant monitoring of prior art, aggressive enforcement, and strategic licensing. Companies should continue to innovate around the patent’s claims, develop complementary applications, and assess potential infringement risks periodically.


Key Takeaways

  • The ‘489 patent’s claims are structured to maximize Protection while maintaining validity, but require ongoing scrutiny as the patent landscape evolves.
  • Prior art relating to similar chemical structures or synthesis methods poses a challenge, emphasizing the importance of continuous patent landscape analysis.
  • Enforcing the patent will depend on the precision of claims and the strength of supporting data demonstrating utility and non-obviousness.
  • Licensing negotiations and strategic product development should leverage specific claim features and narrow scope to mitigate potential infringements.
  • The dynamic patent environment necessitates proactive IP management to sustain market exclusivity and licensing revenue over the patent’s lifespan.

FAQs

Q1: How does the scope of claims in the ‘489 patent influence its enforceability?
The scope determines legal reach: broad claims provide extensive protection but risk invalidation if prior art is found; narrow claims are easier to defend but limit exclusivity.

Q2: What are common challenges faced by patents in the biotechnology sector similar to the ‘489 patent?
Challenges include prior art invalidation, inventive step disputes, and overlapping claims with existing patents, all of which require robust patent drafting and strategic planning.

Q3: How can companies use the patent landscape to strengthen their patent portfolio?
By identifying gaps, avoiding existing patent claims, and filing around core patents, companies can develop complementary claims and fortify their market position.

Q4: What strategies can optimize licensing opportunities based on the ‘489 patent?
Targeting specific therapeutic indications, patenting additional formulations, and securing rights related to synthesis improvements can enhance licensing attractiveness.

Q5: How can emerging disclosures threaten the validity of the ‘489 patent?
New publications or patents that disclose similar structures or methods could be cited as prior art during re-examination, potentially invalidating or narrowing the patent’s scope.


Sources

[1] US Patent and Trademark Office. “Patent Examination Guidelines.”
[2] M. R. O’Shea, “Patent Strategies in Drug Development,” Journal of Intellectual Property Law, 2021.
[3] L. Foster, “Utility and Patentability in Biotechnology,” Nature Biotechnology, 2019.
[4] European Patent Office. “Prior Art Search Reports,” 2022.

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Details for Patent 11,414,489

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 May 05, 2004 11,414,489 2037-02-27
Bausch & Lomb Incorporated VITRASE hyaluronidase Injection 021640 December 02, 2004 11,414,489 2037-02-27
Amphastar Pharmaceuticals, Inc. AMPHADASE hyaluronidase Injection 021665 October 26, 2004 11,414,489 2037-02-27
Akorn, Inc. HYDASE hyaluronidase Injection 021716 October 25, 2005 11,414,489 2037-02-27
Halozyme Therapeutics, Inc. HYLENEX RECOMBINANT hyaluronidase human Injection 021859 December 02, 2005 11,414,489 2037-02-27
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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