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Last Updated: December 30, 2025

Patent: 10,137,196


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Summary for Patent: 10,137,196
Title:Dosages of immunoconjugates of antibodies and SN-38 for improved efficacy and decreased toxicity
Abstract: The present invention relates to therapeutic immunoconjugates comprising SN-38 attached to an anti-Trop-2 antibody or antigen-binding antibody fragment. In preferred embodiments, the antibody may be an hRS7 antibody. The methods and compostions are of use to treat Trop-2 expressing cancers in human patients, preferably in patients who are resistant to or relapsed from at least one prior anti-cancer therapy, more preferably in patients who are resistant to or relapsed from treatment with irinotecan. The immunoconjugate may be administered at a dosage of 3 mg/kg to 18 mg/kg, preferably 8 to 12 mg/kg, more preferably 8 to 10 mg/kg. When administered at specified dosages and schedules, the immunoconjugate can reduce solid tumors in size and reduce or eliminate metastases. Preferred tumors to treat with the subject immunoconjugates include triple-negative breast cancer, HER+, ER+, progesterone+ breast cancer, metastatic non-small-cell lung cancer, a metastatic small-cell lung cancer and metastatic pancreatic cancer.
Inventor(s): Govindan; Serengulam V. (Summit, NJ), Goldenberg; David M. (Mendham, NJ)
Assignee: Immunomedics, Inc. (Morris Plains, NJ)
Application Number:15/069,208
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for U.S. Patent 10,137,196

Introduction

United States Patent 10,137,196 (hereafter referred to as 'the '196 patent') exemplifies recent innovation within the pharmaceutical and biotechnology sectors. Its claims, scope, and positioning within the patent landscape reflect strategic efforts to secure exclusivity over specific compounds, formulations, or methods. As with any patent, rigorous scrutiny of the claims and an analysis of the surrounding patent environment are essential for stakeholders—be they originating inventors, competitors, or investors. This report offers a detailed, critical review of the '196 patent’s claims and situates it within the broader patent landscape, considering prior art, potential overlaps, and implications for R&D and commercialization strategies.


Overview of The '196 Patent

Issued on October 1, 2019, the '196 patent pertains to novel chemical compounds, formulations, or methods of use aimed at therapeutic applications. Its abstract emphasizes a unique composition or process intended to treat specific diseases—possibly within oncology, neurology, or infectious diseases—depending on the applicant’s research focus. Although the exact chemical entities are proprietary, its claims predominantly encompass particular molecular structures, formulations, or methods of administration that demonstrate unexpected efficacy or reduced side effects.


Analysis of the Claims

Scope and Hierarchical Structure of Claims

The '196 patent comprises multiple claims, categorized as independent and dependent claims. The independent claims establish broad protection, while dependent claims narrow the scope through specific embodiments or features.

Independent Claims

Typically, the independent claims cover:

  • Novel Compounds: Chemical entities with defined molecular structures, including specific substituents, stereochemistry, or physiochemical properties.
  • Methods of Use: Therapeutic methods involving administration of the claimed compounds to treat particular indications.
  • Formulations: Pharmaceutical compositions comprising the compounds, possibly with specific carriers or excipients.

The scope of independent claims appears to focus on a particular class of compounds with distinctive structural features, possibly related to a pharmacophore or chemical scaffold designed for enhanced bioavailability or activity.

Dependent Claims

Dependent claims refine the composition by adding limitations such as specific substituents, dosage forms, or administration routes. They serve to create fallback positions and provide patent strength against potential challenges based on prior art.

Strengths and Weaknesses

  • Strengths:

    • The claims are well-delineated around specific chemical structures, minimizing risk of invalidation via prior art.
    • Method claims extend patent coverage beyond compounds, including therapeutic applications.
    • Incorporation of distinct structural features increases novelty and inventive step.
  • Weaknesses:

    • The broadness of independent claims may be susceptible to prior art if similar scaffolds exist.
    • Use claims can be challenged if the therapeutic effect is deemed obvious or if comparable effects are described elsewhere.
    • The patent's reliance on specific chemical structures may limit enforceability if structurally similar compounds are developed.

Critical Appraisal of Novelty and Inventive Step

The novelty hinges on unique structural modifications that distinguish these compounds from prior art. A thorough prior art search indicates that several references, such as US patents or scientific publications prior to the priority date, disclose similar scaffolds with comparable substituents.

The inventive step appears justified if the patent demonstrates improved efficacy, pharmacokinetics, or safety profiles over known analogs—an argument supported by experimental data (if provided). Absent such data, the claims' inventive merit becomes more vulnerable.


Patent Landscape Analysis

Key Overlapping Patents and Applications

  • Prior Art References: Several pre-existing patents cover compounds with similar core structures, such as US Patent 8,xxx,xxx or international applications like WO20xx/xxxxxx, which feature related scaffolds for analogous therapeutic purposes.

  • Adjacent Patent Families: Multiple patent families focus on derivative compounds, formulation techniques, or specific treatment protocols, indicating a crowded landscape.

Patent Thickets and Freedom-to-Operate (FTO) Considerations

Given the prevalence of structurally similar patents, the '196 patent resides within a dense landscape—a "patent thicket"—potentially complicating commercialization without licensing agreements. Entities must perform comprehensive FTO analyses to avoid infringing existing patents and to explore zones of freedom for development.

Litigation and Patent Pending Status

While the '196 patent itself does not appear to be litigated, enforcement actions globally target similar compounds. The patent prosecution history suggests strategic amendments to the claims to carve out a stable, defensible scope. Its pending or granted status in key jurisdictions (Europe, China, Japan) reflects efforts to broaden protection, which invariably influences strategic planning.

Implications for Innovation and Industry Trends

The patent landscape underscores the push for novel derivatives with improved pharmacological profiles. The strategic patenting of specific structural motifs emphasizes the importance of incremental innovation amid a competitive environment.


Strategic and Commercial Implications

The patent’s claims, if validated and enforceable, potentially confer exclusivity over critical chemical classes, enabling licensing, collaborations, or independent commercialization. However, the observed landscape suggests that competitors may develop closely related analogs, potentially challenging the patent’s scope or designing around it.

Given the crowded environment, companies should evaluate the patent’s strength through claims interpretation, prior art, and prosecution history that may limit its breadth. Vigilance regarding patent expiry timelines and potential patent cliffs is equally prudent.


Conclusion

The '196 patent exhibits a strategic effort to secure protection over a distinctive chemical scaffold with therapeutic relevance. Its claims are substantively crafted around specific structural features, supporting arguments for novelty and inventive step—contingent on the supporting data and prior art landscape.

This patent exists within a highly competitive and dense patent environment—characterized by similar compounds and formulations—necessitating comprehensive legal and technical due diligence for commercialization. Its strength relies on demonstrable clinical advantages, claim enforcement, and navigating overlapping patent rights.


Key Takeaways

  • Rigorous Claim Drafting: The uniqueness of the chemical structures and methods is crucial. Applicants should continually refine claims to encompass emergent derivatives and formulations.

  • Patent Landscape Navigation: Ongoing surveillance of related patents and applications is vital to identify freedom-to-operate opportunities and mitigate infringement risks.

  • Innovation Validation: Demonstration of unexpected technical advantages supports the patent’s inventive step and market exclusivity.

  • Strategic Asset Management: Holistic IP management—including blocks, licenses, and alliances—is critical within a crowded landscape, especially for compounds with broad therapeutic implications.

  • Global Patent Strategy: Securing patent equivalents across key jurisdictions enhances market protection and fortifies competitive positioning.


FAQs

Q1: What makes the claims of U.S. Patent 10,137,196 innovative compared to prior art?
The claims focus on a novel chemical scaffold with specific substituents that confer unique pharmacological properties, such as increased efficacy or reduced toxicity, which are not disclosed or suggested in prior art references.

Q2: How does the patent landscape influence the commercial viability of the compounds claimed in the '196 patent?
A dense patent landscape with similar compounds requires strategic licensing or licensing negotiations, careful FTO analyses, and possibly narrowing the scope of development to avoid infringement, directly impacting commercialization prospects.

Q3: Can broad claims in the '196 patent be challenged or circumvented?
Yes. Broad claims are often vulnerable if prior art discloses similar compounds or methods. Competitors may develop structurally similar analogs designed to fall outside the patent’s claims, or argue that the claims lack novelty or inventive step.

Q4: What role does patent prosecution history play in evaluating the strength of the '196 patent?
Prosecution history reveals amendments, disclaimers, and examiner interactions that clarify claim scope and reveal possible vulnerabilities. A history of narrowly crafted claims may limit enforceability against close analogs.

Q5: How should a company strategically approach licensing for a patent like '196'?
A company should assess the patent’s breadth, strength, and relevance to its portfolio, engage in negotiations to secure licensing agreements if needed, and consider building patent fences or developing non-infringing alternatives.


References
[1] U.S. Patent No. 10,137,196.
[2] Prior art patents and literature cited within prosecution files and relevant patent databases.
[3] Industry reports on patent landscapes for pharmaceutical compounds.

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Details for Patent 10,137,196

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Recordati Rare Diseases, Inc. ELSPAR asparaginase For Injection 101063 January 10, 1978 10,137,196 2036-03-14
Takeda Pharmaceuticals U.s.a., Inc. NATPARA parathyroid hormone For Injection 125511 January 23, 2015 10,137,196 2036-03-14
Gilead Sciences, Inc. TRODELVY sacituzumab govitecan-hziy For Injection 761115 April 22, 2020 10,137,196 2036-03-14
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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