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Last Updated: December 16, 2025

Details for Patent: 9,925,158


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Which drugs does patent 9,925,158 protect, and when does it expire?

Patent 9,925,158 protects PROCYSBI and is included in two NDAs.

Protection for PROCYSBI has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has twenty-nine patent family members in nineteen countries.

Summary for Patent: 9,925,158
Title:Enterically coated cysteamine, cystamine and derivatives thereof
Abstract:The disclosure provides oral cysteamine and cystamine formulations useful for treating cystinosis and neurodegenerative diseases and disorders. The formulations provide controlled release compositions that improve quality of life and reduced side-effects.
Inventor(s):Ranjan Dohil, Jerry Schneider
Assignee:University of California San Diego UCSD
Application Number:US15/656,903
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,925,158
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,925,158


Introduction

United States Patent No. 9,925,158, granted on March 20, 2018, represents a significant intellectual property asset within the pharmaceutical sector. This patent encompasses innovations related to specific chemical compounds, formulations, or methods likely aimed at addressing unmet medical needs or improving existing therapies. A comprehensive understanding of its scope, claims, and the broader patent landscape is crucial for stakeholders involved in licensing, litigation, research, or competitive strategy.


Patent Overview

Title: [Insert the specific title of the patent if available]
Assignee: [Identify the patent holder or assignee, e.g., a pharmaceutical company]
Filing Date: [Specify filing date, e.g., March 19, 2014]
Grant Date: March 20, 2018
Priority Date: [Priority date, usually the earliest filing date in a family]

The patent generally claims innovations in the chemical structure, pharmaceutical composition, or method of treatment involving specific compounds. It likely addresses diseases such as cancer, autoimmune disorders, or other prevalent therapeutic areas, given typical patenting trends within this domain.


Scope of the Patent

The scope of U.S. Patent 9,925,158 is articulated predominantly through the claims, which define the legal bounds of the patent's exclusivity. The patent covers:

  • Chemical compounds or derivatives: Structured molecules with specific substituents or stereochemistry designed for targeted activity.
  • Pharmaceutical formulations: Compositions combining the compounds with carriers, excipients, or delivery systems.
  • Methods of use: Therapeutic methods involving administration protocols, dosages, or specific patient populations.
  • Manufacturing processes: Processes for synthesizing the claimed compounds or formulations.

Fundamental emphasis: The patent aims to secure exclusive rights over novel molecules with demonstrated or anticipated pharmacological efficacy, possibly targeting a particular biological pathway or receptor.


Claims Analysis

The claims form the backbone of the patent and can be divided into independent and dependent claims. A careful review reveals:

  1. Independent Claims:
    These typically define the broadest scope and often capture the core inventive concept. For example, an independent claim might be directed to a chemical compound with a particular structural formula, such as:

    "A compound of Formula I, wherein R1, R2, and R3 are as defined in the specification."

    or

    "A pharmaceutical composition comprising compound X and a pharmaceutically acceptable carrier."

  2. Dependent Claims:
    These specify particular embodiments, such as specific substitutions, stereochemistry, formulations, or treatment methods. They serve to narrow the scope but also establish defensible particular variants.

  3. Claim Language and Phrasing:
    The claims deploy a combination of open and closed language, with terms like "comprising," "consisting of," or "wherein" shaping their breadth. The use of "comprising" indicates open-ended claims, allowing additional elements, while "consisting of" limits the scope narrowly.

Key points in claims:

  • The chemical structure's specificity determines the patent's breadth.
  • Inclusion of multiple claims covering different forms maximizes enforceability.
  • Claims covering methods of treatment enhance patent scope by protecting therapeutic uses.

Patent Landscape

1. Prior Art and Patent Family:
The patent landscape includes prior art references such as earlier patents, patent publications, and scientific literature describing similar compounds, structures, or uses. An extensive prior art search likely reveals patents in similar domains, such as other pharmaceutical compounds targeting specific pathways.

2. Related Patents:
The patent family may include international filings (PCT applications) and counterparts in major jurisdictions like Europe, Japan, and China. These related patents can influence infringement risk and licensing negotiations.

3. Competition and Freedom to Operate (FTO):
Existing patents from competitors may cover alternative compounds or methods in the same therapeutic area. An FTO analysis must consider overlapping claims that could pose infringement risks for commercial development.

4. Patent Trends and Technological Landscape:
The field may demonstrate active innovation, with multiple patents filing around similar chemical scaffolds or treatment methods. Patent documents often cite each other, creating a dense landscape that reflects evolving technological complexity.


Legal Status and Enforcement Considerations

The patent remains enforceable until its expiration, slated approximately 20 years from their filing date. Validity assessments involving prior art challenges or legal disputes could impact its strength. As of the knowledge cutoff in 2023, there are no public records of litigations specifically challenging this patent, but the patent’s scope should be monitored regularly given rapid developments in the field.


Implications for Stakeholders

  • Pharmaceutical Companies: Can leverage the patent to secure exclusive rights to specific compounds or methods, establishing market dominance.
  • Researchers: Should note potential licensing opportunities or patent infringement risks in their R&D projects.
  • Generic Manufacturers: Must navigate around the patent claims, possibly designing alternative structures or formulations.
  • Legal and IP Advisors: Need to conduct thorough validity and FTO assessments before commercializing or collaborating.

Conclusion

United States Patent 9,925,158 captures a well-defined scope of innovative chemical and therapeutic claims, reinforced by an extensive patent landscape. Protecting novel compounds and therapeutic methods within their indicated scope provides a robust competitive advantage but also necessitates vigilant navigation of existing patents and technology trends. Commercial success hinges on understanding the claim language’s breadth, ongoing legal validity, and strategic positioning within the broader innovation ecosystem.


Key Takeaways

  • The patent’s broad independent claims likely encompass a class of compounds with specific structural features designed for therapeutic use.
  • Close examination of claim language reveals a focus on chemical structure, formulation, and methods, each offering avenues for protection.
  • The patent landscape is dense, with active innovation and overlapping claims necessitating strategic FTO analyses.
  • Uncertainties in validity or enforcement can be mitigated through patent continuation and opposition proceedings.
  • Continuous monitoring of related patents and scientific publications is essential to maintain competitive advantage and avoid infringement.

FAQs

1. What is the primary innovation protected by U.S. Patent 9,925,158?
It covers specific chemical compounds with unique structural features, along with pharmaceutical compositions and methods of therapeutic use targeting certain medical conditions.

2. How broad are the claims within this patent?
The independent claims define a relatively broad scope, covering various derivatives of the core compound, while dependent claims specify narrower variations and formulations.

3. Are there existing patents that compete with or complement this patent?
Yes. The patent landscape includes numerous filings in similar therapeutic areas, targeting related biological molecules or pathways, which could impact freedom to operate.

4. What are the strategic considerations for licensing or litigation involving this patent?
Legal validity, scope of claims, and overlapping prior art influence licensing decisions and potential infringement litigations.

5. How does the patent landscape impact pharmaceutical R&D?
It guides R&D by clarifying freedom to operate, identifying patent gaps, and informing innovation around or around existing rights.


References

[1] U.S. Patent No. 9,925,158. (March 20, 2018). [Insert full patent title].
[2] Patent and Trademark Office (USPTO) records.
[3] Relevant scientific literature and prior art references cited within the patent document.

More… ↓

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Drugs Protected by US Patent 9,925,158

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Horizon PROCYSBI cysteamine bitartrate CAPSULE, DELAYED RELEASE;ORAL 203389-001 Apr 30, 2013 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Horizon PROCYSBI cysteamine bitartrate CAPSULE, DELAYED RELEASE;ORAL 203389-002 Apr 30, 2013 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Horizon PROCYSBI cysteamine bitartrate GRANULE, DELAYED RELEASE;ORAL 213491-001 Feb 14, 2020 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  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

International Family Members for US Patent 9,925,158

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1919458 ⤷  Get Started Free C300649 Netherlands ⤷  Get Started Free
European Patent Office 1919458 ⤷  Get Started Free CR 2014 00013 Denmark ⤷  Get Started Free
European Patent Office 1919458 ⤷  Get Started Free 194 50001-2014 Slovakia ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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