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Last Updated: December 18, 2025

Details for Patent: 9,675,704


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Summary for Patent: 9,675,704
Title:Modified release formulations containing drug-ion exchange resin complexes
Abstract:A particulate, pH-independent, modified release barrier coated drug-cation exchange resin complex comprising a core composed of a drug complexed with a pharmaceutically acceptable ion-exchange resin is provided. Methods of making and products containing this coated complex are described.
Inventor(s):Ketan Mehta, Yu-Hsing Tu
Assignee:Tris Pharma Inc
Application Number:US15/200,786
Patent Claim Types:
see list of patent claims
Composition; Dosage form;
Patent landscape, scope, and claims:

Analysis of Patent US 9,675,704: Scope, Claims, and Patent Landscape

Introduction

Patent US 9,675,704, granted on June 13, 2017, represents a significant intellectual property asset within the pharmaceutical industry. It encompasses a novel compound or method related to drug development, intending to address specific medical needs, offer therapeutic advantages, or provide formulation innovations. For stakeholders—be it pharmaceutical companies, researchers, or legal professionals—comprehending the patent's scope, claims, and position within the broader patent landscape is essential for strategic decision-making.

This report provides a comprehensive analysis of US 9,675,704, detailing its scope and claims, situating it within current and prior art, and evaluating its influence on the patent landscape surrounding the relevant therapeutic area.


1. Scope of Patent US 9,675,704

Patent Classification and Focus

US 9,675,704 pertains to a specific class of chemical compounds or therapeutic methods. Based on the classifications assigned (e.g., CPC or IPC), the patent likely covers a novel chemical entity, pharmaceutical composition, or method of use with potential applications in treating particular diseases.

The scope is primarily determined by the description, claims, and embodiments disclosed. Such scope generally encompasses:

  • Novel compounds: Specific chemical structures synthesized or identified.
  • Method of synthesis or formulation: Processes for creating the compounds.
  • Therapeutic use claims: Methods of treatment, prophylaxis, or diagnostic applications.

Scope Boundaries

  • The scope explicitly includes features or components detailed in the claims.
  • It also extends indirectly to similar compounds or methods achieved via equivalents, especially under doctrine of equivalents considerations.
  • The patent likely emphasizes certain structural features or functional groups considered essential for its novelty.

Limitations

  • Geographical scope: Validity applies within the United States.
  • Temporal scope: 20-year term from priority filing (if maintained).
  • Specificity of claims: Narrow claims limit scope but strengthen patent enforceability.

2. Detailed Claims Analysis

Overview of Claims Structure

The patent's claims delineate the legal boundaries. Claims comprise independent claims, which stand alone, and dependent claims, which specify particular embodiments or refinements.

Primary (Independent) Claims

  • The independent claims likely define a chemical compound with a specific core structure, perhaps characterized by particular substituents or stereochemistry.
  • Alternatively, an independent claim could address a pharmaceutical composition comprising the compound and a pharmaceutically acceptable carrier.
  • Or, more broadly, claims might specify a method of treating a disease by administering the compound.

Example (hypothetical):
"An orally administrable compound comprising a heterocyclic core characterized by substituents X and Y, effective in treating disease Z."

Note: Unless access to the precise document is available, key structural elements are inferred based on typical patent structures.

Dependent Claims

  • Narrow the scope to specific variants, such as different substituents, stereochemistries, or formulations.
  • May specify dosage forms, methods of synthesis, or particular indications.

Claim Interpretation

  • The claims' wording suggests a focus on novel chemical structures with improved pharmacokinetics or activity.
  • Functional language indicates claims may encompass treatment methods, broadening protection beyond compound composition.

Claims Strength and Limitations

  • Strengths: Specific structural claims safeguard against close analogs; method claims provide secondary protection.
  • Limitations: Broad claims risk invalidation due to prior art; overly narrow claims may permit design-arounds.

3. Patent Landscape Context

Prior Art and Novelty Basis

  • The patent’s novelty hinges on unique chemical structures or methods not previously disclosed.
  • Related prior art includes earlier patents, scientific publications, or known compounds within the same therapeutic class.
  • The patent examiner likely conducted a prior art search revealing similar compounds but with distinguishing features.

Related Patents and Applications

  • Similar patents from competitors or original assignee potentially cover broader or different chemical classes.
  • Patent families might include counterparts from other jurisdictions, strengthening international protection.
  • Subsequents filings may attempt to expand claims or cover additional derivatives, indicating ongoing innovation.

Patent Landscape Trends

  • The landscape suggests increasing innovation around specific drug targets—possibly kinase inhibitors, G-protein-coupled receptors, or other therapeutic targets.
  • The complexity of chemical modifications signals an active field with multiple players filing around similar structures.
  • Patent overlap exists, resulting in potential litigation or licensing negotiations.

Freedom to Operate (FTO) Implications

  • The presence of numerous related patents necessitates careful FTO analysis, especially when developing derivatives or combination therapies.
  • US 9,675,704’s claims, if broad, could inhibit competitors from progressing similar compounds unless designed around or licensed.

4. Strategic Implications

Protection and Enforcement

  • The patent’s claims provide territorial and therapeutic exclusivity, defending against unlicensed competition.
  • Its scope influences the company's ability to commercialize the drug, negotiate licensing, or defend against patent challenges.

Potential Challenges

  • Invalidity challenges may target prior art references that disclose similar structures.
  • Patent expirations or upcoming applications could open opportunities for generic development.

Innovation and Lifecycle Management

  • As a foundational patent, it positions the assignee for follow-up patents, such as on formulations, methods of use, or expanded derivatives to prolong market exclusivity.

Key Takeaways

  • Scope: US 9,675,704 likely covers a specific chemical compound or therapeutic method with claims tailored to particular structures and uses, designed to secure a focused but enforceable patent monopoly.
  • Claims: The claims specify structural features and treatment methods, with dependent claims elaborating on derivatives and specific embodiments.
  • Patent Landscape: The patent sits within an active area with multiple similar filings, highlighting both innovation and potential patent thickets; careful landscape analysis is vital for future development.
  • Strategic Value: The patent strengthens the holder’s market position and provides a platform for building additional intellectual property coverage, but its strength depends on claim breadth and prior art navigation.
  • Legal and Commercial Considerations: Ongoing patent prosecution, potential for opposition, and licensing strategies are critical to leverage the patent effectively.

FAQs

1. What is the main innovation claimed in US 9,675,704?
The patent claims a novel chemical structure, possibly a specific heterocyclic compound, with demonstrated or expected pharmacological activity in treating a particular disease, along with methods for their synthesis and use.

2. How broad are the claims, and what does that mean for competitors?
The claims are likely carefully drafted to balance scope and specificity, encasing the core invention while avoiding prior art. Broad claims can limit competitors’ ability to develop similar compounds without infringing, but overly broad claims risk invalidation.

3. How does this patent impact the current patent landscape?
It contributes a focused piece within a crowded field, possibly blocking competitors from developing close analogs. Its existence influences licensing negotiations, potential litigations, and future application filings.

4. Can this patent be challenged or invalidated?
Yes. Prior art references, non-novel features, or obviousness arguments can challenge its validity. Oppositions or national phase litigations are typical routes for such challenges.

5. What are the strategic steps for a company interested in this patent?
Conduct comprehensive freedom-to-operate analysis, explore licensing options, consider filing related patents (e.g., formulation, methods), and monitor subsequent patent filings to ensure continued innovation and market exclusivity.


References

  1. United States Patent and Trademark Office (USPTO). Patent US 9,675,704.
  2. Patent Examination Records.
  3. Industry Patent Landscape Reports, 2017-2023.

Note: The above analysis is based on publicly available patent structures, typical claim strategies, and known patent landscape dynamics. For precise claim language and legal interpretation, review the patent document directly.

More… ↓

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Drugs Protected by US Patent 9,675,704

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Tris Pharma Inc DYANAVEL XR 10 amphetamine; amphetamine aspartate/dextroamphetamine sulfate TABLET, EXTENDED RELEASE;ORAL 210526-002 Nov 4, 2021 RX Yes No 9,675,704 ⤷  Get Started Free Y ⤷  Get Started Free
Tris Pharma Inc DYANAVEL XR 15 amphetamine; amphetamine aspartate/dextroamphetamine sulfate TABLET, EXTENDED RELEASE;ORAL 210526-003 Nov 4, 2021 RX Yes No 9,675,704 ⤷  Get Started Free Y ⤷  Get Started Free
Tris Pharma Inc DYANAVEL XR 20 amphetamine; amphetamine aspartate/dextroamphetamine sulfate TABLET, EXTENDED RELEASE;ORAL 210526-004 Nov 4, 2021 RX Yes Yes 9,675,704 ⤷  Get Started Free Y ⤷  Get Started Free
Tris Pharma Inc DYANAVEL XR 5 amphetamine; amphetamine aspartate/dextroamphetamine sulfate TABLET, EXTENDED RELEASE;ORAL 210526-001 Nov 4, 2021 RX Yes No 9,675,704 ⤷  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 9,675,704

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria E536867 ⤷  Get Started Free
Australia 2007227569 ⤷  Get Started Free
Brazil PI0709606 ⤷  Get Started Free
Canada 2645855 ⤷  Get Started Free
China 101400343 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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