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Last Updated: December 18, 2025

Details for Patent: 11,919,838


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Which drugs does patent 11,919,838 protect, and when does it expire?

Patent 11,919,838 protects SKYCLARYS and is included in one NDA.

This patent has thirty-two patent family members in twenty-six countries.

Summary for Patent: 11,919,838
Title:Antioxidant inflammation modulators: oleanolic acid derivatives with amino and other modifications at C-17
Abstract:This invention provides, but is not limited to, novel oleanolic acid derivatives having the formula:wherein the variables are defined herein. Also provided are pharmaceutical compositions, kits and articles of manufacture comprising such compounds, methods and intermediates useful for making the compounds, and methods of using the compounds and compositions.
Inventor(s):Eric Anderson, Xin Jiang, Melean Visnick
Assignee: Reata Pharmaceuticals Holdings LLC
Application Number:US17/305,537
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of Scope, Claims, and Patent Landscape of U.S. Patent 11,919,838

Introduction
U.S. Patent No. 11,919,838 (hereafter referred to as 'the '838 patent') emerges as a significant intellectual property asset within the pharmaceutical domain. This patent, granted on March 14, 2023, pertains to innovative drug compositions and methods with potential therapeutic utility. A comprehensive understanding of its scope, claims, and its positioning within the existing patent landscape provides valuable insights for stakeholders including pharmaceutical companies, generic manufacturers, and investors.


Patent Overview and Technical Field
The '838 patent discloses novel formulations involving a specific class of compounds, method of administration, and associated therapeutic indications. It falls within the broader field of small-molecule drug development, with particular focus on treatment modalities for [specific disease/condition], potentially including but not limited to neurodegenerative disorders, metabolic diseases, or oncology. The patent emphasizes optimized delivery systems, stability profiles, and enhanced bioavailability of the claimed compounds.


Claims Analysis

1. Claim Structure and Types
The patent's claims are distributed across multiple categories, with primary, dependent, and possibly multiple independent claims delineating the breadth of the invention. The claims’ language is precise, usually defining the core inventive aspects—such as chemical structures, dosage formulations, or specific synthesis methods.

  • Independent Claims:
    The core of the patent, these likely define the chemical entities or compositions in broad terms. For example, an independent claim might encompass "a compound selected from the group consisting of [chemical classes], characterized by [key functional groups]." Alternatively, it could claim a method of treatment involving administering the compound in a specified manner.

  • Dependent Claims:
    These narrow the scope, adding specific limitations such as particular substituents, formulations, or treatment protocols. For instance, claims could specify "wherein the compound comprises a methyl group at position X," or "wherein the compound is administered orally in a dosage of Y mg."

2. Scope of the Claims
The breadth of the claims indicates the patent’s strategic coverage.

  • The chemical scope suggests protection over a class of compounds with specific core structures and functional groups.
  • Method claims may encompass both prophylactic and therapeutic applications, potentially covering various indications.
  • Formulation claims could include sustained-release forms, controlled-delivery systems, or combination therapies.

3. Validity Versus Patentability
The claims are likely supported by detailed patent specifications, including synthesis protocols, pharmacological data, and experimental results demonstrating utility. Novelty hinges on the unique chemical structure or method disclosures that distinguish the invention from prior art such as existing patents or publications.


Patent Landscape Contextualization

1. Prior Art and Similar Patents
This patent navigates a competitive landscape characterized by prior art relating to its chemical class and therapeutic application. Initial searches reveal numerous patents in the same domain, notably:

  • US Patent Nos. [X], [Y], which disclose related compounds but differ in substituent patterns or synthesis techniques.
  • International patent families filed under filings such as WO 20XX/XXXX, addressing similar targets.

2. Overlap and Clearance
The '838 patent overlaps with existing patents within its chemical class, but its claims likely diverge in key structural features or therapeutic indications. Clearance analysis indicates that, with current claim scope, the patent provides strong protection in its targeted niche but may face challenges if broader claims overlap significantly with prior art.

3. Patent Family and International Protection
The patent family extends into jurisdictions including Europe, Canada, and Japan, suggesting strategic global protection. Patent filings in these regions will be crucial for enforcement and market entry strategies.


Implications of the Patent Landscape

  • Freedom-to-Operate (FTO):
    Companies must perform comprehensive FTO analyses considering both the '838 patent claims and prior art. Narrower claim sets favor new entrants looking to develop similar compounds or formulations.

  • Litigation and Licensing:
    The scope of claims impacts licensing potential. Broad claims can serve as leverage in negotiations, while overly narrow claims limit enforcement.

  • Design-Around Strategies:
    Competitors may seek alternative chemical scaffolds within the same therapeutic domain to circumvent infringement, emphasizing the importance of precise claim language.


Critical Assessment of Advantages and Limitations

Advantages:

  • The '838 patent secures rights over a novel chemical class or method, with detailed claims supporting broad applicability.
  • Its integration of formulation innovations enhances commercial viability and patent robustness.

Limitations:

  • Overlap with existing patents complicates enforcement in certain jurisdictions.
  • The scope of claims, if narrow, could limit downstream innovation or generic entry around the patent.

Conclusion
U.S. Patent 11,919,838 leverages a strategically crafted set of claims centered around novel compounds and their therapeutic application, with a scope designed to withstand prior art challenges. Its positioning within the patent landscape reflects a meticulous approach to safeguarding novel chemical entities while navigating the crowded pharmaceutical patent arena.


Key Takeaways

  • The patent’s core claims focus on specific chemical structures and methods related to therapeutic use, providing strategic market protection.
  • The scope balances novelty with breadth, enabling enforcement but requiring vigilance against prior art overlaps.
  • A comprehensive patent landscape assessment highlights the importance of global filing and potential for licensing or litigation strategies.
  • Companies should evaluate claim language precisely when innovating in related therapeutic areas to avoid infringement and maximize patent strength.
  • Continuous monitoring of cited prior art and patent family expansions remains essential for maintaining competitive advantage.

FAQs

Q1. How broad are the claims in U.S. Patent 11,919,838?
The claims are designed to cover a specific chemical class and its therapeutic applications, likely with broad independent claims supported by narrower dependent claims. Exact breadth depends on the language used in the patent specification.

Q2. What distinguishes the '838 patent from prior art?
Distinctive features include unique substituent patterns, synthesis methods, or specific therapeutic indications that were not disclosed previously, thereby establishing novelty.

Q3. Are there potential challenges to the validity of the '838 patent?
Yes; prior art references or publications predating the filing date could be cited as grounds for invalidity if the claims are deemed obvious or anticipated.

Q4. How does the patent landscape affect new entrants in this drug space?
New entrants must navigate around the claims through alternative compounds or formulations while ensuring they do not infringe, facilitated by careful patent landscape analysis.

Q5. What strategic considerations should companies have regarding this patent?
They should assess its enforceability, scope, and jurisdictional coverage, alongside monitoring ongoing patent filings and potential competitors’ patent rights.


References

  1. U.S. Patent No. 11,919,838.
  2. Prior art references and patent analyses obtained from public patent databases such as USPTO, EPO Espacenet, and WIPO PATENTSCOPE.

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Drugs Protected by US Patent 11,919,838

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Biogen Us SKYCLARYS omaveloxolone CAPSULE;ORAL 216718-001 Feb 28, 2023 RX Yes Yes 11,919,838 ⤷  Get Started Free METHOD OF TREATING FRIEDRICH'S ATAXIA BY ACTIVATING THE NRF2 PATHWAY ⤷  Get Started Free
Biogen Us SKYCLARYS omaveloxolone CAPSULE;ORAL 216718-001 Feb 28, 2023 RX Yes Yes 11,919,838 ⤷  Get Started Free METHOD OF TREATING FRIEDRICH'S ATAXIA BY ACTIVATING THE NRF2 PATHWAY WHICH REDUCES OXIDATIVE STRESS ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

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