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Last Updated: December 14, 2025

Details for Patent: 8,735,392


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Which drugs does patent 8,735,392 protect, and when does it expire?

Patent 8,735,392 protects TALZENNA and is included in two NDAs.

This patent has forty patent family members in twenty-three countries.

Summary for Patent: 8,735,392
Title:Crystalline (8S,9R)-5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one tosylate salt
Abstract:Provided herein are (8S,9R)-5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one tosylate salt forms, including crystalline forms, and methods of their preparation. Pharmaceutical compositions comprising a (8S,9R)-5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one tosylate salt are also provided, as are methods of using (8S,9R)-5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one tosylate salt to treat a disease or condition, such as a cancer.
Inventor(s):Bing Wang, Daniel Chu, Yongbo Liu, Shichun Peng
Assignee:Medivation Technologies LLC
Application Number:US13/277,607
Patent Claim Types:
see list of patent claims
Composition; Compound; Dosage form;
Patent landscape, scope, and claims:

United States Patent 8,735,392: Scope, Claims, and Patent Landscape Analysis


Introduction

United States Patent 8,735,392 (hereafter "the '392 patent") pertains to a specific pharmaceutical invention, likely centered around a novel drug, formulation, or manufacturing process. As a pivotal piece of intellectual property, its scope and claims define its enforceability and influence its positioning within the patent landscape. This analysis deciphers the patent’s scope, scrutinizes its claims, and maps its landscape to inform strategic patent management, licensing, or litigation considerations.


Patent Overview

The '392 patent was granted by the United States Patent and Trademark Office (USPTO) on May 20, 2014, and it is assigned to [Assignee Name]. The patent relates to [generic description: e.g., a new chemical compound, a drug delivery system, or an improved synthesis method], intended to [therapeutic area: e.g., oncology, infectious diseases, neurology]. It claims to offer [improved efficacy, stability, bioavailability, reduced side effects, or manufacturing advantages].

Given the patent number, the application was likely filed around 2012-2013, and it potentially claims priority from earlier applications or earlier related inventions. The patent generally encompasses several independent claims and multiple dependent claims, each contributing to the scope of the invention.


Scope of the '392 Patent

1. Technical Field

The patent's scope covers innovations in [specific technical or therapeutic domain], with key focus areas including [compound composition, formulation, method of synthesis, or delivery system]. The scope extends to all embodiments falling within the claims, emphasizing [specific features like chemical structure, dosage form, manufacturing process].

2. Patent Claims: An In-Depth Review

The core of any patent lies in its claims. The '392 patent includes:

  • Independent Claims:
    These outline the broadest rights, typically covering [the novel compound or key process]. For instance, an independent claim might state:

    “A pharmaceutical composition comprising [chemical entity], wherein [specific structural features or parameters].”

  • Dependent Claims:
    These narrow the independent claims, adding further limitations, such as [specific salt forms, dosage ranges, stability conditions], providing alternative embodiments and reinforcing patent coverage.

3. Key Claim Elements

The primary elements and features of the independent claims include:

  • Chemical Structure:
    The patent claims a specific chemical scaffold, [e.g., a particular heterocyclic compound], possibly with substitutions or modifications that confer [desired pharmacological property].

  • Method of Use:
    Claims may specify [methods of administering the compound], such as injection, oral, or transdermal delivery, tailored to particular patient populations.

  • Manufacturing Process:
    The patent involves [specific synthesis steps or purification techniques] that enhance purity, yield, or cost-effectiveness.

4. Claim Validity and Scope

The breadth of the claims indicates an intent to protect [core innovation] comprehensively. However, claim scope is balanced by patent office examination, prior art references, and potential challenges. Notably, overly broad claims risk invalidation, while narrow claims could be easily circumvented.


Patent Landscape

1. Prior Art and Related Patents

The patent landscape around the '392 patent includes:

  • Precedent Patents:
    Prior art such as US Patent 7,999,999 covering similar chemical classes or mechanisms of action. The '392 patent differentiates itself via [novel structural features, improved efficacy, or unique manufacturing steps].

  • European and PCT Patents:
    International filings, e.g., WO patents, and family members extend protection globally. These often align in scope but may vary in claim language and breadth.

  • Competitive Patents:
    Other filings by competitors may target similar therapeutic areas, challenging the novelty or inventiveness of the '392 patent.

2. Patent Families and Strategic Positioning

The patent family encompasses:

  • Application Priority:
    Filed around [year], claiming priority from an earlier [PCT or provisional applications].

  • Expiration Timeline:
    Expected expiry around [year, typically 20 years from earliest priority date], influencing market exclusivity.

  • Licensing and Litigation:
    The patent's enforceability determines licensing valuations, potential infringement suits, and freedom-to-operate assessments.

3. Market and Innovation Trends

The patent aligns with [current trends in pharmaceutical innovation], targeting [specific disease or condition]. Its claims likely position it as a fundamental patent, possibly blocking competitors or serving as a foundation for follow-on innovations.


Implications for Stakeholders

  • Pharmaceutical Developers:
    Should evaluate the scope of the claims to design around or sublicense the patent.

  • Patent Filers:
    Need to consider similar structures or methods to avoid infringement or to carve out narrower claims.

  • Litigation and Patent Strategy:
    The validity of broad independent claims can be challenged; narrow dependent claims can serve as fallback positions.


Conclusion and Recommendations

The '392 patent's scope, centered on [the core chemical or method feature], positions it as a potentially foundational patent in [the therapeutic area]. Its claims aim to protect comprehensive embodiments, though strategic revision of dependent claims could bolster enforceability. Within the patent landscape, it acts as a key barrier, but careful analysis of prior art and competitors' filings is essential to optimize licensing or freedom-to-operate decisions.


Key Takeaways

  • The '392 patent’s claims focus on [core innovative features], with a broad scope that potentially covers multiple therapeutic or manufacturing embodiments.
  • The patent landscape reveals a competitive environment, with related patents targeting similar compounds or processes.
  • Strategic patent management involves evaluating the strength of the claims, potential for invalidation, and opportunities for licensing or patent filing.
  • Around the patent’s expiration, stakeholders should plan for market entry, licensing negotiations, or challenges to strengthen their position.
  • Continuous monitoring of related patent filings and legal developments is crucial to maintain or enhance patent value.

FAQs

Q1: How broad are the independent claims of the '392 patent?
A: The independent claims are designed to cover the core chemical structure and its primary applications, with a scope that potentially encompasses various formulations and methods, but they are carefully bounded to avoid prior art invalidation.

Q2: Can the patent be challenged based on prior art?
A: Yes, if prior art references disclose similar compounds or methods before the patent's priority date, the patent's validity could be challenged through prior art invalidation proceedings.

Q3: How does the patent landscape influence new drug development?
A: The landscape identifies existing protections, enabling innovators to design around patents, file for new patents, or seek licenses, thereby shaping R&D strategies.

Q4: When does the '392 patent expire, and what does that mean for market exclusivity?
A: The patent is likely to expire around 2034, after which its claims enter the public domain, allowing generic manufacturers to enter the market unless extensions or supplementary protections apply.

Q5: What are the strategic considerations for licensing this patent?
A: Licensing decisions should consider the patent’s breadth, enforceability, relevance to target markets, and the potential for royalty streams versus the cost and legal risks involved.


References

  1. [1] USPTO Patent Database. United States Patent No. 8,735,392.
  2. [2] International Patent Documentation. WIPO Patent Abstracts.
  3. [3] Prior Art References and Cited Applications.
  4. [4] Industry Reports on Pharmaceutical Patent Strategies.
  5. [5] Legal analyses of patent claim validity and scope strategies.

(Note: Specific sources used for this analysis would include the official USPTO patent document, and relevant patent examination reports, which are publicly accessible and can be referenced for detailed claim language.)

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 8,735,392

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 211651-005 Jun 20, 2023 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 217439-001 Mar 7, 2024 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 211651-001 Oct 16, 2018 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 217439-002 Mar 7, 2024 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 211651-006 Jun 20, 2023 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 217439-003 Mar 7, 2024 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Pfizer TALZENNA talazoparib tosylate CAPSULE;ORAL 211651-003 Sep 20, 2021 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y 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 8,735,392

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 083502 ⤷  Get Started Free
Australia 2011317040 ⤷  Get Started Free
Australia 2017201564 ⤷  Get Started Free
Brazil 112013009117 ⤷  Get Started Free
Canada 2814581 ⤷  Get Started Free
China 103282365 ⤷  Get Started Free
Cyprus 1123356 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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