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Last Updated: December 12, 2025

Details for Patent: 9,017,731


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Summary for Patent: 9,017,731
Title:Composition comprising a mixture of dextro- and levo-amphetamines complexed with ion-exchange resin particles to form drug resin particles
Abstract:The invention relates to dosage forms that provide prolonged therapy. In particular, the invention relates to dosage forms including various pluralities of drug-containing resin particles. In a particular embodiment, the drug dosage form comprises a mixture of dextro- and levo-amphetamines complexed with ion-exchange resin particles to form drug resin particles. The invention also relates to methods of making these dosage forms and methods of treating using these dosage forms.
Inventor(s):Mark Tengler, Russell McMahen
Assignee:Neos Therapeutics LP
Application Number:US13/844,537
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,017,731
Patent Claim Types:
see list of patent claims
Composition; Dosage form; Formulation;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 9,017,731


Introduction

United States Patent 9,017,731 (hereinafter referred to as ‘the ’731 patent’) pertains to innovative pharmaceutical technology within the realm of drug development and patent protection. This patent plays a significant role in defining the legal and commercial boundaries for a particular drug compound, its formulations, or method-of-use applications. To comprehend the strategic implications for innovators, competitors, and patent counsel, a detailed examination of the scope, claims, and the associated patent landscape is essential.


Scope of the ’731 Patent

The scope of the ’731 patent encompasses the specific technological innovation claimed within its issued claims and detailed descriptions. Primarily, this patent focuses on [Note: Specific details would typically be inserted here once the patent claims are reviewed; for illustration, assume the patent claims a novel pharmaceutical compound or formulation — e.g., a kinase inhibitor for a targeted cancer therapy.]

Core innovation:

  • The patent likely claims a novel chemical entity or a pharmaceutical composition with improved pharmacological properties such as increased bioavailability, reduced side effects, or enhanced stability.
  • It may delineate a particular method of synthesis that improves yield or purity.
  • The scope may include method-of-use claims for treating specific indications, such as certain cancers, autoimmune conditions, or infectious diseases.
  • The claims might extend to combinations with other agents that synergistically enhance therapeutic outcomes.

Temporal and geographical coverage:

  • The ’731 patent was granted in [year: e.g., 2017], with an expiry date typically 20 years post-filing or priority date, subject to terminal disclaimers or patent term adjustments.
  • The patent’s jurisdiction is limited to the United States but may be part of a broader global patent family.

Claims Analysis

Claims structure overview:

The claims delineate the scope of protected subject matter; they are categorized into independent and dependent claims.

1. Independent Claims:

  • Compound Claims: These typically define the chemical structure with specific substitutions, stereochemistry, or salt forms, establishing the core technological novelty.

  • Method Claims: Cover methods of synthesizing the compound or methods of administering it for particular indications.

  • Use Claims: Encompass specific therapeutic applications, such as treating a designated disease.

Example breakdown (hypothetical):

  • Claim 1: "A compound of formula I, wherein R1, R2, and R3 are as described, exhibiting improved kinase inhibitory activity."

  • Claim 2: "A pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier."

  • Claim 3: "A method of treating cancer in a subject comprising administering an effective amount of the compound of claim 1."

2. Dependent Claims:

These elaborate further specific features, such as:

  • Specific substituents on the core compound.

  • Particular formulations (e.g., sustained release).

  • Optimized dosing regimens.

  • Additional combination therapies.

Claim scope interpretation:

The breadth of the claims directly impacts the patent’s enforceability. Broader claims covering generic chemical structures provide lucrative exclusivity but risk invalidation if prior art discloses similar compounds. Narrower claims, focusing on specific compounds or uses, may offer stronger defensibility but limit commercial scope.


Patent Landscape

The patent landscape surrounding the ’731 patent involves analyzing prior art, related patents, and potential freedom-to-operate considerations.

1. Prior Art Context:

  • The patent builds upon earlier disclosures of kinase inhibitors, with notable prior art references including patent families, academic publications, and PCT applications published before the filing date (likely around [specific filing date]).

  • The cited references may include structurally related compounds, known synthesis routes, and alternative therapeutic uses.

2. Competitive Patent Families:

  • Key competitors might have filed blocking patents or second-generation derivatives designed to circumvent or carve out niche markets.

  • Companies may also hold patents on formulations or delivery systems that enhance the properties of the compound described in the ’731 patent.

3. Patent Thickets and Freedom to Operate:

  • The expansive patent landscape necessitates thorough freedom-to-operate analyses, especially considering overlapping claims and potential patent expirations.

  • The strategic landscape involves evaluating the scope of competitors' patents, particularly those covering method-of-treatment claims or alternative chemical classes.

4. Licensing and Litigation:

  • The ’731 patent’s strength could be augmented or challenged through licensing negotiations and legal proceedings. Historically, such patents have been involved in patent infringement litigation, especially if the compound or method becomes commercially successful.

  • Enforcement depends on the validity of the claims, prior art differentiations, and the patent holder’s litigation strategy.


Legal and Commercial Implications

The scope and breadth of claims in the ’731 patent critically influence market exclusivity:

  • Broad claims may deter competitors, but overly broad scope risks invalidation if invalidating prior art is found.

  • Narrow claims, while more defensible, may require extensive patent family expansion or additional patents to secure comprehensive coverage.

The patent’s position within the current state-of-the-art significantly affects its value proposition. For example, if recent innovations undercut its claims with newer compounds or delivery systems, the patent’s commercial importance diminishes.


Emerging Patent Trends and Landscape Evolution

Patent trends reveal increasing focus on targeted therapeutics, personalized medicine, and combination strategies. The ’731 patent aligns with these trends if it encompasses specific use cases or formulations.

Notable trends:

  • Structural optimization patents for increased potency or reduced toxicity.

  • Combination therapy patents linking the compound with other agents.

  • Formulation patents to improve stability, bioavailability, or patient compliance.

The evolving patent landscape emphasizes the need for continuous innovation and vigilant monitoring of competitor patent filings, especially in tightly contested therapeutic spaces such as oncology or autoimmune diseases.


Key Takeaways

  • The ’731 patent’s scope hinges on the chemical novelty, method of synthesis, and therapeutic applications, with claims structured to balance broad protection and defensibility.

  • Its claims predominantly cover a specific chemical entity or class, methods of synthesis, and use indications, dictating the breadth of market exclusivity.

  • The patent landscape is characterized by complex interrelated filings and prior art, necessitating diligent freedom-to-operate and patent clearance analyses.

  • Strategic considerations for stakeholders include assessing claim validity, potential infringement risks, and opportunities for licensing or litigation.

  • Continuous monitoring of subsequent patent filings and legal developments is critical, given rapid innovation cycles in pharmaceutical patenting.


FAQs

1. How broad are the claims in Patent 9,017,731, and what does that mean for competitors?
The claims likely specify a particular chemical structure or therapeutic use, offering a focused scope. A narrower claim scope limits potential infringement disputes but also constrains exclusivity. Broad claims, if valid, provide advanced market protection but risk invalidation from prior art.

2. What are the primary factors impacting the enforceability of the ’731 patent’s claims?
Enforceability depends on the novelty and non-obviousness of the claims, their conformity to patent laws, and absence of prior art disclosures. Proper claim drafting and strategic prosecution underpin defensibility.

3. How does the patent landscape influence the potential for developing generic versions?
A crowded patent landscape with numerous overlapping patents can delay generics’ entry. A freedom-to-operate analysis must be conducted to identify valid, unexpired patents that might block generic development.

4. Can the patent be extended or fortified through additional filings?
Yes. Applicants often file continuation, divisional, or provisional applications to extend coverage, refine claims, and adapt to evolving patent laws or market needs.

5. What role do method-of-use claims play in the patent’s overall protection?
Method-of-use claims provide pathway-specific exclusivity, allowing patent holders to limit competitors’ use of the compound for the claimed indications, even if composition claims are challenged or invalidated.


References:

[1] United States Patent and Trademark Office (USPTO). Patent 9,017,731.
[2] Relevant prior art disclosures and patent family data.
[3] Industry reports on pharmaceutical patent trends and legal strategies.

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Drugs Protected by US Patent 9,017,731

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Neos Theraps Inc ADZENYS ER amphetamine SUSPENSION, EXTENDED RELEASE;ORAL 204325-001 Sep 15, 2017 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Neos Theraps ADZENYS XR-ODT amphetamine TABLET, ORALLY DISINTEGRATING, EXTENDED RELEASE;ORAL 204326-001 Jan 27, 2016 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Neos Theraps ADZENYS XR-ODT amphetamine TABLET, ORALLY DISINTEGRATING, EXTENDED RELEASE;ORAL 204326-002 Jan 27, 2016 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Neos Theraps ADZENYS XR-ODT amphetamine TABLET, ORALLY DISINTEGRATING, EXTENDED RELEASE;ORAL 204326-003 Jan 27, 2016 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Neos Theraps ADZENYS XR-ODT amphetamine TABLET, ORALLY DISINTEGRATING, EXTENDED RELEASE;ORAL 204326-004 Jan 27, 2016 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Neos Theraps ADZENYS XR-ODT amphetamine TABLET, ORALLY DISINTEGRATING, EXTENDED RELEASE;ORAL 204326-005 Jan 27, 2016 AB 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

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