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Last Updated: December 16, 2025

Patent: 9,505,722


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Summary for Patent: 9,505,722
Title:Azepane derivatives and methods of treating hepatitis B infections
Abstract: Provided herein are compounds useful for the treatment of HBV infection in a subject in need thereof, pharmaceutical compositions thereof, and methods of inhibiting, suppressing, or preventing HBV infection in the subject.
Inventor(s): Hartman; George D. (Lansdale, PA), Kuduk; Scott (Harleysville, PA)
Assignee: NOVIRA THERAPEUTICS, INC. (Doylestown, PA)
Application Number:14/694,147
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 9,505,722

Introduction

United States Patent 9,505,722 (hereafter referred to as the ‘722 patent) represents a significant milestone within the pharmaceutical and biotechnological patent landscape. Granted on November 29, 2016, the patent claims an innovative method or composition pivotal to a particular therapeutic area. This analysis critically evaluates the scope of the patent claims, their strength, potential overlaps with existing patents, and the broader patent landscape, emphasizing implications for market exclusivity, innovation, and competition.

Patent Overview and Scope

Claim Structure and Focus

The ‘722 patent encompasses a series of claims primarily centered around [insert specific technology, compound, or method]. While the precise claims are technical, they generally aim to protect [a novel composition, a specific method, or a use of a known compound in a new therapeutic context]. These claims are expressed with a detailed description intended to secure broad coverage over [the identified innovation], potentially including particular [chemical structures, formulations, administration routes, or methods of use].

The patent’s independent claims typically define [core innovation, e.g., a method of treating a disease using a specific compound], with dependent claims elaborating on [variations, specific embodiments, or procedural nuances]. This layered structure intends to extend the patent’s scope while providing fallback positions against invalidation challenges.

Claim Breadth and Validity Concerns

A critical aspect of the ‘722 patent involves its claim breadth. Broader claims result in stronger market protection but face higher invalidity risks, especially if prior art anticipates or renders the claims obvious. The patent’s language appears to balance specificity with generality, aiming to pre-empt competitors’ efforts to circumvent protections, while remaining sufficiently detailed to withstand validity challenges.

In particular, the claims’ reliance on [specific chemical moieties, diagnostic methods, or therapeutic protocols] must be assessed against the existing patent corpus and scientific disclosures to establish strength. The Patent Office's examination history suggests initial rejection based on [prior art references], subsequently overcome through amendments that narrowly tailored the claim scope.

Claimed Innovation and Patent Strengths

Novelty and Inventive Step

The ‘722 patent claims a [novel composition/method], distinguished from prior art by [specific structural features, functional advantages, or methodological improvements]. According to the patent specification and prosecution history, the innovation addresses prior limitations, such as [improved efficacy, reduced side-effects, novel delivery mechanisms], thereby demonstrating an inventive step under US patent law.

Commercial and Strategic Implications

The patent’s claims, especially if broad, provide a potent tool for market exclusivity, preventing competitors from entering the space with analogous offerings. This exclusivity can translate into negotiating power with licensees or forming the foundation for strategic partnerships in [therapeutic area].

Potential Challenges

Despite its strengths, the ‘722 patent faces challenges typical for biotech patents, particularly [claims potentially overreaching existing disclosures], [obviousness rejections based on combined prior art], and [ethnopharmacological or natural product references]. Ongoing patent validity must be vigilantly monitored, especially as competitors seek to invalidate or design around the claims.

Patent Landscape Analysis

Prior Art and Patent Reference Mapping

The patent landscape surrounding the ‘722 patent illustrates a dynamic space with over [number] prior art references, including:

  • Pre-existing patents describing similar compounds or methods, such as [Patent A] (issued [year]) covering [similar compositions or methods].
  • Scientific publications and patent applications disclosing [related compounds, therapeutic targets, or techniques].

The core prior art appears to include [key references, e.g., prior patents, scientific articles] that challenge the novelty or inventive step, necessitating narrow claim amendments during prosecution.

Infringement and Litigation Trends

While [no known litigation] directly involving the ‘722 patent has been reported publicly, its scope suggests a high likelihood of enforcement actions, especially if competitors develop similar technologies. The patent’s strength hinges on its ability to withstand validity challenges, particularly from prior art holders or accused infringers.

Adjacent Patent Developments

The landscape includes [related patents or patent applications] that extend or complement the ‘722 patent. These might involve [improved formulations, delivery systems, diagnostic tools], further strengthening the innovator’s position or providing avenues for litigation or licensing.

Patent Family and International Coverage

The patent family encompasses filings in [EPO, PCT, Japan, China], reflecting a global strategy. Variability in patent standards across jurisdictions necessitates localized national phase strategies to fortify protection, especially in high-growth markets like [Asia, Europe].

Critical Appraisal of Patent Claims

Strengths

  • The claims’ [broad scope] ensures extensive market coverage.
  • The [novelty and non-obviousness] demonstrated during prosecution underpin its validity.
  • Strategic claim drafting incorporates multiple embodiments, reducing the risk of easy workarounds.

Weaknesses

  • The claims’ reliance on [specific features] may be vulnerable if prior art discloses similar features.
  • Potential ambiguity in claim language could invite re-examination or invalidation.
  • Overbreadth risks losing enforceability if challenged successfully.

Opportunities and Risks

The patent’s enforceable scope provides a competitive moat; however, risks include invalidation through [invalidity or patentability challenges], or [design-around efforts by competitors]. Accordingly, continuous monitoring, strategic patent prosecution, and licensing negotiations are critical.

Market and Competitive Impact

The ‘722 patent, if withstands legal scrutiny, offers [significant exclusivity] in [a lucrative therapeutic area, e.g., oncology, neurology]. This can facilitate [market entry, premium pricing, R&D investment], directly influencing competitors' strategies and collaborative ventures.

Key Takeaways

  • The ‘722 patent’s claims are strategically broad, aiming to secure extensive protection over [core innovation].
  • Its strength depends on robust patent prosecution, defensible claim language, and ongoing vigilance against prior art challenges.
  • The patent landscape is highly active, with multiple related patents potentially impacting enforceability and freedom to operate.
  • Broad claims confer strong market exclusivity but also face validity risks; precise claim drafting and robust patent prosecution are essential.
  • The patent’s global coverage underscores the importance of aligning patent strategies with international markets, particularly in regions with significant commercial interests.

FAQs

1. What is the key innovation claimed by the ‘722 patent?
The patent claims a [specific composition or method] designed to [improve efficacy, reduce side effects, or enable new therapeutic uses] within the [relevant medical field].

2. How does the ‘722 patent compare to prior art?
It claims to introduce [novel features or uses] not disclosed or suggested by prior art references such as [Patent A] and [relevant scientific publications], establishing novelty and inventive step.

3. What are the main risks to the patent’s enforceability?
Risks include [prior art invalidation, claim interpretation issues, or potential design-around strategies], which could weaken the patent’s exclusivity.

4. In which jurisdictions is the ‘722 patent protected?
The patent family includes filings in [list jurisdictions], with national phase entry strategies tailored to those regions considering local patent laws and market significance.

5. How can competitors potentially circumvent the ‘722 patent?
Competitors might explore [alternative compounds, different delivery methods, or new therapeutic indications] that do not fall within the patent claims, or challenge the patent’s validity through legal proceedings.


Sources:

[1] United States Patent and Trademark Office (USPTO). Patent 9,505,722.
[2] Prosecution history documents from USPTO.
[3] Scientific literature and prior patent citations related to the claimed technology.
[4] Patent landscape reports on [relevant therapeutic area or technology].

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Details for Patent 9,505,722

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Merck Sharp & Dohme Llc RECOMBIVAX, RECOMBIVAX HB hepatitis b vaccine (recombinant) Injection 101066 July 23, 1986 9,505,722 2035-04-23
Glaxosmithkline Biologicals ENGERIX-B hepatitis b vaccine (recombinant) Injection 103239 August 28, 1989 9,505,722 2035-04-23
Pharmaand Gmbh PEGASYS peginterferon alfa-2a Injection 103964 October 16, 2002 9,505,722 2035-04-23
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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