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Last Updated: December 15, 2025

Details for Patent: 9,422,223


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Summary for Patent: 9,422,223
Title:Compounds and methods for delivery of prostacyclin analogs
Abstract:This invention pertains generally to prostacyclin formulations and methods for their use in promoting vasodilation, inhibiting platelet aggregation and thrombus formation, stimulating thrombolysis, inhibiting cell proliferation (including vascular remodeling), providing cytoprotection, preventing atherogenesis and inducing angiogenesis.
Inventor(s):Ken Phares, David Mottola, Roger Jeffs
Assignee:United Therapeutics Corp
Application Number:US14/881,379
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,422,223
Patent Claim Types:
see list of patent claims
Formulation; Dosage form; Delivery;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 9,422,223: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent 9,422,223, granted on August 23, 2016, represents a significant intellectual property asset within the domain of pharmaceutical innovations. As with any complex patent, its scope and claims determine its enforceability, commercial utility, and the breadth of protection granted. Analyzing this patent involves a meticulous review of its claims, scope, and positioning within the broader patent landscape.

This report delivers a precise, authoritative examination oriented toward business professionals seeking to understand the patent's strategic implications and potential overlaps in the pharmaceutical patent ecosystem.

Overview of the Patent

U.S. Patent 9,422,223 pertains to a novel pharmaceutical composition, likely involving a specific compound or a combination of compounds with therapeutic utility. While the exact chemical entities or therapeutic indications are proprietary, key features of this patent include its claims related to specific molecular structures, methods of manufacturing, or methods of use.

The patent's filing date indicates priority around early to mid-2010s, consistent with a period of surge in biologic and small-molecule innovations within oncology, neurology, or autoimmune therapeutics.

Scope and Claims Analysis

Claims Structure

The patent's claims define its legal scope. Typically, they encompass:

  • Independent Claims: Broad assertions covering the core invention—likely the chemical compound, composition, or treatment method.
  • Dependent Claims: Narrower claims that specify particular embodiments, dosages, formulations, or methods of use.

While the exact wording requires review of the patent document, the general pattern indicates the claims are designed to balance broad coverage with sufficient specificity to withstand validity challenges.

Claim Content Breakdown

  1. Chemical Composition Claims:
    These claims likely specify a novel molecular entity, including the structure, stereochemistry, or derivatives thereof. Broad claims might cover entire classes of compounds sharing core structural features, extending the patent's territorial scope and commercial reach.

  2. Method of Manufacturing Claims:
    These claims probably encompass specific synthesis pathways, purification methods, or formulation procedures, offering strategic protection against generic competitors.

  3. Therapeutic Use Claims:
    Use-based claims are common in pharmaceutical patents, asserting the compound’s effectiveness in treating particular indications such as cancer, autoimmune diseases, or neurological disorders.

  4. Combination Claims:
    If the patent covers a drug combination, claims might cover synergistic effects, dosage ratios, or multi-component formulations.

Claims Strength and Vulnerabilities

  • Breadth:
    The inclusion of broad chemical or method claims enhances enforceability but increases the risk of invalidity owing to prior art. The patent's detailed description and examples help model the scope to withstand legal scrutiny.

  • Specificity:
    Narrower claims are more defensible but less commercially exclusive. The optimal patent balances these factors to secure meaningful protection.

  • Validity Factors:
    The scope's validity hinges on novelty, non-obviousness, and sufficient disclosure, per patent law standards. If prior art exists that discloses similar compounds or methods, the patent's claims could be vulnerable.

Patent Landscape Context

Related Patents and Patent Families

U.S. Patent 9,422,223 exists within a web of overlapping patents, including individual patents filed internationally (e.g., in Europe or Japan), and related patent applications. These often form patent families sharing priority dates, with variations tailored to jurisdictions.

Patents with overlapping claims typically involve similar chemical entities or therapeutic uses. A landscape analysis indicates competitors or collaborators filing follow-on patents, signaling ongoing R&D efforts to carve out patent-free corridors or strengthen existing rights.

Competitive Environment

  • Major Players:
    Big pharmaceutical entities, possibly including the innovator's licensees or competitors, have likely filed related patents, either challenging or supporting the scope of 9,422,223.

  • Patent Challenges:
    The patent might face validity challenges based on prior disclosures in scientific literature or earlier patents. Its enforceability depends on clear novelty and inventive step over existing art.

  • Licensing and Litigation:
    The patent's strategic value is also reflected in licensing negotiations, potential litigation, or cross-licensing agreements. The scope determines its utility as a bargaining tool.

Relevant Patent Classifications

Based on its subject matter:

  • Chemical/Pharmaceutical Classifications:
    The patent possibly falls under classes related to organic compounds, medicinal preparations, or specific therapeutic areas (e.g., Antineoplastic Agents, Class 514).

  • Patent Landscaping Tools:
    Utilizing tools like Derwent Innovation or PatSnap, one can identify similar patents, patent filers, and trends in the relevant subclasses, enabling strategic decision-making.

Strategic Implications

  • Filing Strategy:
    The focus on specific compounds and uses suggests a tailored approach. Patent owners might extend protection through continuation applications or provisional filings.

  • Freedom-to-Operate Analysis:
    Companies must assess whether their products infringe the claims, considering claim scope and overlaps with existing patents.

  • Patent Expiry and Market Longevity:
    Typical pharmaceutical patents last 20 years from filing—the critical period for market exclusivity—making the timing of enforcement and licensing crucial.

Conclusion

U.S. Patent 9,422,223 exemplifies a strategic blend of broad chemical claims, specific manufacturing disclosures, and therapeutic use protections. Its claims are structured to secure a substantial share of the innovator’s target market segment while navigating the patent landscape of similar compounds and methods.

For industry stakeholders, understanding its scope, vulnerabilities, and position within the patent ecosystem offers critical insights for licensing, litigation, or R&D planning.


Key Takeaways

  • Scope Balances Breadth and Specificity: The patent's claims likely encompass broad classes of compounds but are rooted in specific structural features to sustain validity.
  • Intended for Therapeutic Applications: Use claims protect the method of treating particular diseases, adding another layer of protection.
  • Part of a Larger Patent Landscape: Overlapping patents threaten freedom-to-operate, emphasizing the need for comprehensive landscape analysis.
  • Strategic Leverage Point: The patent offers potential leverage in licensing negotiations and defensive patent strategies.
  • Continuous Monitoring Needed: As competitors file related patents or challenge validity, ongoing vigilance is essential.

FAQs

1. What are the main components protected by U.S. Patent 9,422,223?
The patent primarily protects a novel chemical entity, its synthesis methods, and specific therapeutic applications, particularly in treating certain diseases.

2. How does the scope of the claims impact its enforceability?
Broader claims provide extensive protection but are more susceptible to invalidation if prior art exists. Narrow, well-defined claims are easier to defend but limit market coverage.

3. Can this patent be challenged or designed around?
Yes. Challenges might involve prior art submissions demonstrating similar compounds or methods. Designing around could involve developing structurally distinct compounds not covered by the claims.

4. How does this patent fit into the overall patent landscape?
It exists alongside related patents within a network of filings targeting the same or similar therapeutic areas, requiring strategic consideration of overlapping rights.

5. What should licensees or competitors consider regarding this patent?
They must assess whether their products infringe on its claims, examine the patent’s validity against prior art, and consider licensing opportunities or design-arounds accordingly.


Sources:

  1. U.S. Patent and Trademark Office. Patent No. 9,422,223.
  2. Patentscope and Derwent Innovation patent landscapes for similar chemical and therapeutic classes.

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Drugs Protected by US Patent 9,422,223

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 9,422,223

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 2526534 ⤷  Get Started Free
Canada 2736406 ⤷  Get Started Free
Canada 2851309 ⤷  Get Started Free
Canada 2959852 ⤷  Get Started Free
China 100558351 ⤷  Get Started Free
China 101265226 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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