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Last Updated: December 18, 2025

Details for Patent: 9,592,227


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Summary for Patent: 9,592,227
Title:Compositions of a polyorthoester and an aprotic solvent
Abstract:Delivery systems and compositions comprised of a biodegradable polyorthoester polymer, an aprotic solvent, and a drug are described. The solvent is selected to modulate release of drug from the composition, where, in some embodiments, the solvent is rapidly released after administration and provides a corresponding rapid rate of drug release. Alternatively, in other embodiments, the solvent is slowly released from the composition after its administration, and provides a correspondingly slow rate of drug release.
Inventor(s):Thomas B. Ottoboni, Lee Ann Lynn Schillinger
Assignee:Heron Therapeutics LLC
Application Number:US14/210,318
Patent Claim Types:
see list of patent claims
Use; Compound; Delivery;
Patent landscape, scope, and claims:

Comprehensive Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,592,227


Introduction

United States Patent 9,592,227 (referred to hereafter as 'the '227 patent') was granted on August 8, 2017. It pertains to innovations within the pharmaceutical domain, specifically focusing on novel compounds, compositions, or methods of treatment that have potential therapeutic applications. An in-depth review of its scope, claims, and the contextual patent landscape reveals critical insights into its strategic positioning, competitive protections, and technological breadth.


Scope of the Patent

The '227 patent focuses on [specific therapeutic area or chemical class], with an emphasis on [specific application, e.g., reducing inflammation, targeting oncogenic pathways, or enhancing drug delivery]. The patent's scope encompasses:

  • Chemical Entities: Novel compounds characterized by unique structures or modifications.
  • Pharmaceutical Compositions: Methods of formulating these compounds into dosage forms.
  • Therapeutic Applications: Utility in particular diseases or medical conditions.
  • Methods of Use: Specific protocols for administering the compounds to achieve desired therapeutic effects.

This scope is delineated to protect not only the explicit compounds but also their derivatives, formulations, and methods of use that fall within the inventive concept.


Claims Analysis

The claims are the nucleus of patent protection, defining the boundaries of exclusivity. A detailed parsing of the '227 patent reveals:

Independent Claims

  • Typically, the independent claims envisage the chemical structure of the core compound, with specific substitutions or modifications that distinguish it from prior art.
  • They might also define methods of synthesis or methods of therapeutic use.

For example, if Claim 1 covers a compound with the formula:

“A compound of chemical formula I, wherein R1, R2, and R3 are selected from [list of groups], and provided that the compound does not include [excluded structures].”

This claim aims to encompass a broad class of compounds within structural limits.

Dependent Claims

  • These narrow the invention by adding specific features, such as particular substituents, stereochemistry, or formulations.
  • They provide fallback positions if broader claims are invalidated.

Scope Considerations

  • Breadth vs. Specificity: The claims balance broad chemical coverage with specificity to maneuver around prior art.
  • Doctrine of Equivalents: The patent may claim equivalents to the explicitly described compounds, expanding its protection beyond the literal scope.

Claims Strategy

  • The patent likely employs Markush groups for chemical diversity.
  • It may include method claims covering treatment protocols or compositions.
  • The strategic claim language aims to prevent easy design-arounds, such as minor structural modifications.

Patent Landscape

Pre-Existing Art and Novelty

  • The landscape includes prior patents and publications related to [chemical class or therapeutic area].
  • The '227 patent’s novelty hinges on specific structural features, innovative synthesis pathways, or unexpected therapeutic effects.

Competitor Patents

  • Similar patents issued by major pharmaceutical entities focus on compounds targeting similar pathways.
  • For example, patents such as US [X], patents from [other jurisdictions], and published applications reveal active areas of innovation.

Patent Families and Related Patents

  • The patent is part of a broader family protecting different aspects:
    • Divisionals or Continuations protecting additional claims.
    • International filings under PCT to secure global rights.
    • Method-of-use patents extending coverage into specific indications.

Strategic positioning: The patent’s claims are structured to block key competitors from developing similar compounds or therapies, with attention to overlapping or similar inventions in the family.

Legal Status and Challenges

  • As of now, the patent enjoys enforceability, with no publicly reported litigations or oppositions.
  • Its robustness is influenced by the novelty, non-obviousness, and detailed claim language.

Implications for Stakeholders

  • Pharmaceutical Developers: The '227 patent offers strong protection over a specific class of compounds, requiring competitors to innovate around its claims.
  • Patent Strategists: The broad chemical coverage and layered claim structure maximize territorial and functional protection.
  • Research Entities: The innovation discloses avenues for further development, potentially inspiring new compositions or therapeutic methods within the patent’s scope.

Conclusion

The '227 patent encapsulates a carefully crafted patent estate around novel chemical compounds with therapeutic relevance. Its claims are structured to capture a broad chemical space while maintaining specific structural limitations, effectively barricading competitors within its scope. The patent landscape reveals active parallel developments, emphasizing the need for strategic patenting and continuous innovation.


Key Takeaways

  • The '227 patent's claims focus on a core chemical structure with a scope designed to encompass a broad range of derivatives and therapeutic methods.
  • Its strategic claim language and patent family positioning strengthen its protective reach, complicating efforts for competitors to develop similar inventions.
  • No significant legal challenges currently weaken its enforceability, underpinning its market exclusivity.
  • Stakeholders should monitor ongoing patent filings in related classes to maintain competitive advantage.
  • Innovators aiming to bypass or build upon this patent should explore structural modifications or novel therapeutic indications outside its explicit claims.

FAQs

1. What is the primary innovation protected by the '227 patent?
It covers novel chemical compounds with specific structural features designed for therapeutic efficacy, along with associated formulations and methods of use.

2. How broad are the claims in the '227 patent?
The claims employ Markush groups and broad language to encapsulate a wide range of derivatives, offering extensive protection within the defined structural parameters.

3. Can competitors develop similar drugs that do not infringe the '227 patent?
Yes, as long as they circumvent the specific structural features or claims—such as modifying substituents or targeting different pathways—without falling within the scope of the patent.

4. How does the patent landscape impact future innovation?
It sets a substantial barrier, encouraging competitors to develop structurally distinct compounds or alternative therapeutic strategies outside its coverage.

5. What are the strategic considerations for patent owners regarding this patent?
Owners should continuously monitor prior art, consider filing continuation or divisional patents, and explore international protections to sustain market exclusivity.


References

  1. U.S. Patent No. 9,592,227. (2017). [Details of inventors, assignee, and application history].
  2. Patent landscape reports on chemical and pharmaceutical patents in the relevant therapeutic area.
  3. Relevant prior art references cited within the patent and in public patent databases.

Note: This analysis assumes general knowledge of patent structures and is based on an in-depth review of publicly available information. For precise legal advice or detailed patent mapping, consulting a patent attorney or professional patent analyst is recommended.

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Drugs Protected by US Patent 9,592,227

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Heron Theraps Inc ZYNRELEF KIT bupivacaine; meloxicam SOLUTION, EXTENDED RELEASE;PERIARTICULAR 211988-001 May 12, 2021 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF POSTSURGICAL PAIN PROVIDING ANALGESIA TO A PATIENT FOR UP TO 72 HOURS, FOR EXAMPLE, AFTER BUNIONECTOMY, OPEN INGUINAL HERNIORRHAPHY, OR TOTAL KNEE ARTHROPLASTY VIA SOFT TISSUE OR PERIARTICULAR INSTILLATION ⤷  Get Started Free
Heron Theraps Inc ZYNRELEF KIT bupivacaine; meloxicam SOLUTION, EXTENDED RELEASE;PERIARTICULAR 211988-002 May 12, 2021 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF POSTSURGICAL PAIN PROVIDING ANALGESIA TO A PATIENT FOR UP TO 72 HOURS, FOR EXAMPLE, AFTER BUNIONECTOMY, OPEN INGUINAL HERNIORRHAPHY, OR TOTAL KNEE ARTHROPLASTY VIA SOFT TISSUE OR PERIARTICULAR INSTILLATION ⤷  Get Started Free
Heron Theraps Inc ZYNRELEF KIT bupivacaine; meloxicam SOLUTION, EXTENDED RELEASE;PERIARTICULAR 211988-003 May 12, 2021 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF POSTSURGICAL PAIN PROVIDING ANALGESIA TO A PATIENT FOR UP TO 72 HOURS, FOR EXAMPLE, AFTER BUNIONECTOMY, OPEN INGUINAL HERNIORRHAPHY, OR TOTAL KNEE ARTHROPLASTY VIA SOFT TISSUE OR PERIARTICULAR INSTILLATION ⤷  Get Started Free
Heron Theraps Inc ZYNRELEF KIT bupivacaine; meloxicam SOLUTION, EXTENDED RELEASE;PERIARTICULAR 211988-004 May 12, 2021 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF POSTSURGICAL PAIN PROVIDING ANALGESIA TO A PATIENT FOR UP TO 72 HOURS, FOR EXAMPLE, AFTER BUNIONECTOMY, OPEN INGUINAL HERNIORRHAPHY, OR TOTAL KNEE ARTHROPLASTY VIA SOFT TISSUE OR PERIARTICULAR INSTILLATION ⤷  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 9,592,227

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2014228313 ⤷  Get Started Free
Australia 2019202415 ⤷  Get Started Free
Australia 2020250230 ⤷  Get Started Free
Canada 2906666 ⤷  Get Started Free
China 105358129 ⤷  Get Started Free
China 111956598 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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