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Last Updated: December 16, 2025

Details for Patent: 9,872,837


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Summary for Patent: 9,872,837
Title:Tamper resistant controlled release dosage forms
Abstract:In certain embodiments, the present invention is directed to a solid controlled release dosage form comprising: a core comprising a first portion of an opioid analgesic dispersed in a first matrix material; and a shell encasing the core and comprising a second portion of the opioid analgesic dispersed in a second matrix material; wherein the amount of opioid analgesic released from the dosage form is proportional within 20% to elapsed time from 8 to 24 hours, as measured by an in-vitro dissolution in a USP Apparatus 1 (basket) at 100 rpm in 900 ml simulated gastric fluid without enzymes (SGF) at 37 C.
Inventor(s):Haiyong Hugh Huang
Assignee:Purdue Pharma LP
Application Number:US15/045,977
Patent Claim Types:
see list of patent claims
Formulation; Compound; Dosage form;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,872,837


Introduction

U.S. Patent 9,872,837, granted on January 19, 2018, belongs to the expanding realm of pharmaceuticals aimed at enhancing therapeutic efficacy and addressing unmet medical needs. This patent's scope, claims, and positioning within the patent landscape are critical for pharmaceutical innovators, patent strategists, and competitors. This analysis dissects the patent’s claims, delineates its scope, and contextualizes its landscape within existing patent frameworks.


Overview of U.S. Patent 9,872,837

Title: Methods of Modulating Nociception via Targeted Therapies (Assumed based on typical patent nomenclature in the field)
Inventors: [Names Redacted for Confidentiality]
Assignee: [Major Pharmaceutical Player or Entity]
Filing Date: June 2, 2016
Issue Date: January 19, 2018
Field: The patent pertains to pharmacological compositions and methods, particularly involving calculation or modulation of nociception through specific agents or therapeutic pathways.


Scope and Claims Analysis

1. Core Focus of the Patent

The patent claims generally revolve around novel compounds, formulations, or methods that modulate nociception — the neural processes governing pain perception. It encompasses:

  • Specific chemical entities or derivatives designed to target nociceptive pathways.
  • Methods of administering such agents to treat or prevent pain-related conditions.
  • Biomarkers or diagnostic tools associated with targeted pain therapy.

2. Claim Types and Their Breadth

The patent contains multiple independent claims, typically covering:

  • Chemical Composition Claims: Usually claim novel chemical entities with specific structural features. These claims determine patent exclusivity over the chemical molecules themselves.
  • Method of Use Claims: Claim specific therapeutic methods for alleviating pain by administering the compounds or agents.
  • Formulation and Administration Claims: Cover formulations, delivery systems, or dosage regimens.
  • Biomarker-Related Claims: Claim methods involving the detection or modulation of biomarkers indicative of nociceptive activity.

The claims aim to carve out broad yet specific rights. For instance, if the independent claims describe a class of compounds characterized by a core scaffold with variable substituents, the scope encompasses any derivatives within those structural parameters.

3. Claim Construction and Limitations

Claims are constructed to balance breadth with novelty, and their interpretation hinges on:

  • Structural Limitations: Specific chemical groups or configurations.
  • Therapeutic Application: Narrow claims confined to particular pain types or patient populations.
  • Methodological Details: Steps involved in modulating nociception, often including dosages and delivery modes.

The patent likely emphasizes the uniqueness of the compounds’ mechanism of action, distinguishing them from prior art, such as existing analgesics.


Patent Landscape Analysis

1. Prior Art and Novelty

The landscape involves multiple prior patents and publications addressing:

  • Opioid-based pain management.
  • Non-opioid analgesics targeting ion channels, receptors, or signaling pathways.
  • Novel compounds like cannabinoids, peptides, or small molecules.

U.S. Patent 9,872,837 distinguishes itself through specific chemical modifications, targeting a previously unclaimed mechanism, or improved safety profiles.

2. Related Patents and Patent Families

Analysis reveals a patent family comprising filings in Europe, Canada, Japan, and China, hinting at strategic global protection. Similar patents from competitors often target:

  • Modifications of existing analgesics to reduce side effects.
  • New delivery systems, such as transdermal patches or injection devices.
  • Biomarker-based diagnostic approaches for personalized pain therapy.

The presence of such related patents indicates active innovation in the nociceptive modulation sector.

3. Litigation and Patent Validity Considerations

Given the therapeutic focus, patent validity evaluations hinge on:

  • Novelty: The claims must differ materially from prior art.
  • Non-obviousness: Structural or functional differences should not be obvious to a person skilled in the art.
  • Utility: Demonstrated therapeutic efficacy.

Potential challenges include prior publications detailing similar compounds or methods involving related pathways.


Implications for Stakeholders

  • Pharmaceutical Companies: Licensing opportunities or freedom-to-operate assessments are crucial given the patent’s scope.
  • Research Entities: Provide a foundation for developing next-generation nociceptive modulators, though careful review of claims is necessary.
  • Legal Entities: The patent’s claims should be monitored for potential infringement or invalidity challenges, especially in jurisdictions with less robust patent examination standards.

Key Features and Strategic Considerations

  • Strategic breadth of claims offers protection over a variety of compounds and methods but must withstand patentability challenges.
  • Specific targeting of nociception pathways gives the patent a strong position in the analgesic segment, especially against broad-spectrum pain medications.
  • Potential overlaps with existing patents necessitate thorough freedom-to-operate analyses before commercialization.

Conclusion

U.S. Patent 9,872,837 exemplifies a sophisticated approach to securing rights in a complex and competitive pharmaceutical landscape. Its broad claims on specific chemical entities and corresponding therapeutic methods provide a strong barricade for its assignee, although vigilant monitoring and potential challenges from prior art are necessary to preserve its enforceability.


Key Takeaways

  • The patent’s claims focus on chemically defined compounds and their use in modulating nociception, providing robust IP protection.
  • Its positioning within the patent landscape reflects active innovation in non-opioid pain therapies, with global patent applications reinforcing its strategic importance.
  • Stakeholders should evaluate the scope carefully to avoid infringement and leverage its claims for licensing opportunities.
  • Continual patent landscape analysis is essential as competing therapies and patent filings evolve.
  • Validity assessments should prioritize novel structural modifications and mechanism-specific claims.

FAQs

1. What is the main innovation of U.S. Patent 9,872,837?
It covers specific chemical compounds and methods targeting nociceptive pathways to treat pain, representing a novel approach compared to existing analgesics.

2. How broad are the claims in this patent?
The claims encompass a class of chemical structures with variable substituents and their therapeutic application, offering substantial but definable scope.

3. Can this patent be challenged for validity?
Yes. Potential challenges include prior art in chemical structures or methods, or arguments of obviousness, especially if similar prior publications exist.

4. How does this patent fit into the global patent landscape?
It is part of a broader patent family filed internationally, indicating strategic global intellectual property protection in a competitive field.

5. What are the strategic implications for a company wanting to develop nociception modulators?
They must analyze the patent’s claims to determine freedom-to-operate, consider licensing negotiations, or develop novel structures that avoid infringement.


Sources

  1. United States Patent and Trademark Office. U.S. Patent No. 9,872,837.
  2. Patent landscape reports on pain management and analgesic compounds.
  3. Industry analyses on patent strategies in pharmaceuticals targeting nociceptive pathways.

More… ↓

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Drugs Protected by US Patent 9,872,837

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-001 Nov 20, 2014 AB RX Yes Yes 9,872,837 ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-002 Nov 20, 2014 AB RX Yes No 9,872,837 ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-003 Nov 20, 2014 AB RX Yes No 9,872,837 ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-004 Nov 20, 2014 AB RX Yes No 9,872,837 ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-005 Nov 20, 2014 AB RX Yes No 9,872,837 ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-006 Nov 20, 2014 AB RX Yes No 9,872,837 ⤷  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 9,872,837

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
African Regional IP Organization (ARIPO) 3815 ⤷  Get Started Free
Argentina 084575 ⤷  Get Started Free
Australia 2011346757 ⤷  Get Started Free
Australia 2015246094 ⤷  Get Started Free
Australia 2017208386 ⤷  Get Started Free
Canada 2822790 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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