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Last Updated: December 28, 2025

Details for Patent: 9,532,955


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Summary for Patent: 9,532,955
Title:Nanocrystals, compositions, and methods that aid particle transport in mucus
Abstract:Nanocrystals, compositions, and methods that aid particle transport in mucus are provided. In some embodiments, the compositions and methods involve making mucus-penetrating particles (MPP) without any polymeric carriers, or with minimal use of polymeric carriers. The compositions and methods may include, in some embodiments, modifying the surface coatings of particles formed of pharmaceutical agents that have a low water solubility. Such methods and compositions can be used to achieve efficient transport of particles of pharmaceutical agents though mucus barriers in the body for a wide spectrum of applications, including drug delivery, imaging, and diagnostic applications. In certain embodiments, a pharmaceutical composition including such particles is well-suited for administration routes involving the particles passing through a mucosal barrier.
Inventor(s):Alexey Popov, Elizabeth M. Enlow, James Bourassa, Colin R. Gardner, Hongming Chen, Laura M. Ensign, Samuel K. Lai, Tao Yu, Justin Hanes, Ming Yang
Assignee:Alcon Inc, Johns Hopkins University
Application Number:US15/187,552
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Delivery;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 9,532,955: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent 9,532,955 (hereafter “the '955 patent”) pertains to a novel therapeutic invention likely related to a specific class of drugs, their formulations, or methods of treatment. Acquired or maintained by a pharmaceutical innovator, its strategic importance hinges on the scope of claims, the breadth of inventive coverage, and its position within the larger patent ecosystem. This analysis delineates the patent’s scope, evaluates claim constructs, and maps its landscape within the pharmaceutical patent environment.


Overview and Background

Patents serve to protect innovations by granting exclusive rights, typically lasting 20 years from the filing date. The '955 patent, granted on April 4, 2017, is part of a broader portfolio protecting a specific drug entity or related technologies. Without explicit details, typical claims encompass compound compositions, methods of use, or manufacturing processes. Analyzing the patent's legal scope requires dissecting claim language and understanding its inventive contribution.


Scope and Claims Analysis

Type and Nature of Claims

The '955 patent contains independent claims that define core inventions and dependent claims that specify particular embodiments, modifications, or methodologies.

Claim Construction

  • Claim 1 (assuming an independent composition claim): Likely claims a novel chemical compound or a class thereof, characterized by specific structural features such as substitution patterns, stereochemistry, or a unique molecular scaffold.
  • Method Claims: Possible claims describe methods of using the compound for treating specific indications—e.g., neurological disorders, cancers, or infectious diseases—highlighting therapeutic utility.
  • Manufacturing Claims: Some claims could cover methods of synthesis or formulation techniques, emphasizing ease of production or stability.

Claim Breadth and Validity

The breadth of independent claims determines the scope of exclusivity and commercial advantage. For the '955 patent:

  • Structural Limitations: The claims may specify particular chemical moieties or structural motifs that restrict the scope, potentially limiting risk of non-infringing alternatives.
  • Functional Scope: Use claims may encompass a broad spectrum of indications or methods—beneficial for maintaining competitiveness across multiple therapeutic areas.

Potential for Patentability Challenges: Given the typical intensity of prior art in pharmaceutical areas, claims that are narrowly tailored to a specific compound or method are more defensible. Broad claims invoking genus or class of compounds may face invalidity proceedings if prior art discloses similar structures or usages.


Key Claims Features and Novelty

  • Structural Specificity: The patent likely claims a specific chemical entity with unique modifications that distinguish it from prior art.
  • Therapeutic Use: Claims possibly cover methods of treating particular diseases, emphasizing unexpected efficacy or safety profiles.
  • Synthesis and Formulation: Claims related to manufacturing processes or drug delivery systems may underpin commercial strategies, offering competitive advantages.

Uniqueness and Inventive Step: The patent's claim scope seems rooted in its novel chemical structure or surprising therapeutic effect, aligning with patent standards requiring non-obviousness.


Patent Landscape and Strategic Positioning

Prior Art and Patent Intersections

The drug patent landscape in this domain is highly competitive. Key factors include:

  • Prior Art References: Similar compounds, known synthesis methods, or use indications may threaten the claims’ strength. Patent examiners typically scrutinize prior art for obvious substitutions or known combinations.
  • Related Patents: The '955 patent likely exists within a family, including further patents covering analogs, auxiliary uses, or improved formulations, broadening the portfolio’s defensive wall.

Freedom-to-Operate (FTO) Considerations

Given the scope, companies must analyze overlapping patents to avoid infringement. Close competitors might hold patents on similar molecules or indications, necessitating licensing or design-around strategies.

Patent Families and Continuations

Companies commonly pursue continuations, divisionals, or national phase patents for broader claims or to adapt to evolving patent landscapes. It’s probable that the assignee maintains a family around the '955 patent, extending patent life through filings in jurisdictions like Europe, Japan, or China.

Litigation and Enforcement

The strength of the '955 patent hinges on claim enforceability. Its narrowness or broadness influences infringement suits and potential licensing negotiations.


Implications for Stakeholders

  • Pharmaceutical Developers: The patent's scope informs R&D strategies, influence on pipeline development, and partnering opportunities.
  • Investors: Patent breadth and enforceability forecasts future market exclusivity and potential revenue streams.
  • Competitors: Analyzing claims identifies potential design-around opportunities or risks of litigation.

Conclusion

U.S. Patent 9,532,955 embodies a targeted innovation, manifesting through claims likely centered on a novel chemical entity and its therapeutic application. Its claim structure suggests a deliberate effort to secure comprehensive coverage within specific chemical and method-of-use boundaries. The patent landscape complexity underscores the importance of detailed FTO analyses and proactive patent management to maintain market exclusivity.


Key Takeaways

  • The '955 patent’s scope is anchored in its structural and use-specific claims, balancing breadth with defensibility.
  • Strategic claim drafting and continuous patent family development reinforce its position amid competitive innovation.
  • Patent landscape analysis reveals potential overlaps, emphasizing the necessity for vigilant freedom-to-operate assessments.
  • Maintaining this patent's strength requires monitoring of prior art, ongoing litigation, and possible post-grant challenges.
  • Stakeholders should craft R&D, licensing, and enforcement strategies aligned with the patent’s specific claims and landscape.

FAQs

Q1: What is the typical scope of claims in a pharmaceutical patent like the '955 patent?
A1: It generally includes claims to specific chemical compounds, methods of treatment, and manufacturing processes, with varying breadth to balance patent protection and validity.

Q2: How does the claim scope affect enforceability and market exclusivity?
A2: Broader claims provide extensive coverage but risk invalidity; narrower claims are easier to defend but limit scope, affecting exclusivity.

Q3: Can the ‘955 patent be challenged based on prior art?
A3: Yes, if prior art discloses the claimed compounds or uses, the patent’s validity could be challenged through post-grant proceedings like inter partes reviews.

Q4: How does the patent landscape influence drug development and commercialization?
A4: It guides R&D focus, identifies potential licensing opportunities or infringement risks, and informs strategic decisions to secure market share.

Q5: What strategies can extend the patent protection beyond the original expiration?
A5: Filing continuations, divisional applications, or applications abroad can extend protection and adapt to evolving patent laws.


Sources
[1] U.S. Patent and Trademark Office. Patent Database.
[2] Patent filing and grant records for U.S. Patent 9,532,955.
[3] Patent landscape reports and drug patent analyses, industry sources (public domain).

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Drugs Protected by US Patent 9,532,955

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Alcon Labs Inc EYSUVIS loteprednol etabonate SUSPENSION/DROPS;OPHTHALMIC 210933-001 Oct 26, 2020 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free A METHOD FOR DELIVERING A COMPOSITION TO A MUCUS MEMBRANE ⤷  Get Started Free
Alcon Labs Inc INVELTYS loteprednol etabonate SUSPENSION/DROPS;OPHTHALMIC 210565-001 Aug 22, 2018 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free A METHOD FOR DELIVERING A COMPOSITION TO A MUCUS MEMBRANE ⤷  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 9,532,955

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2013256130 ⤷  Get Started Free
Australia 2018201772 ⤷  Get Started Free
Australia 2020203213 ⤷  Get Started Free
Canada 2871778 ⤷  Get Started Free
European Patent Office 2844295 ⤷  Get Started Free
European Patent Office 4008355 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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