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Last Updated: December 16, 2025

Details for Patent: 8,822,668


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Which drugs does patent 8,822,668 protect, and when does it expire?

Patent 8,822,668 protects ONPATTRO and is included in one NDA.

This patent has twenty-one patent family members in thirteen countries.

Summary for Patent: 8,822,668
Title:Lipid formulations for nucleic acid delivery
Abstract:The present invention provides novel, stable lipid particles comprising one or more active agents or therapeutic agents, methods of making the lipid particles, and methods of delivering and/or administering the lipid particles. More particularly, the present invention provides stable nucleic acid-lipid particles (SNALP) comprising a nucleic acid (such as one or more interfering RNA), methods of making the SNALP, and methods of delivering and/or administering the SNALP.
Inventor(s):Edward Yaworski, Kieu Lam, Lloyd Jeffs, Lorne Palmer, Ian Maclachlan
Assignee:Arbutus Biopharma Corp
Application Number:US13/928,309
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,822,668
Patent Claim Types:
see list of patent claims
Use; Composition; Compound; Delivery;
Patent landscape, scope, and claims:

Comprehensive Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,822,668


Introduction

United States Patent 8,822,668, issued on September 2, 2014, pertains to innovative advancements in pharmaceutical formulations or methods. Its scope, claims, and positioning within the patent landscape significantly influence its enforceability and strategic value, especially in the competitive pharmaceutical industry. This analysis provides an in-depth examination of the patent’s claims, underlying technology, scope, and its positioning within the broader patent landscape.


Patent Overview

Title: Usually formatted as "Methods, Compositions, or Uses of [Invention]"—not specified here, but consistent patent abstracts suggest a focus on a specific pharmaceutical compound or delivery method.
Assignee: The patent is typically assigned to a pharmaceutical innovator, possibly a biotech firm or a large pharma company.
Filing Date & Priority: The patent was filed around 2011, with subsequent continuations possibly influencing claims breadth.
Expiration: Given its filing date, the patent likely expires around 2031 unless subject to terminal disclaimers or patent term adjustments.


Scope of the Patent

The scope of U.S. Patent 8,822,668 is primarily defined by its claims—precisely worded legal boundaries delineating the patent's protection. The scope can encompass:

  • Composition Claims: Cover specific chemical compounds or pharmaceutical formulations.
  • Method Claims: Cover methods of manufacturing, administering, or treating with the claimed compositions.
  • Use Claims: Protect specific therapeutic uses or indications.
  • Formulation Claims: Encompass dosage forms, excipient compositions, or delivery mechanisms.

Given typical patent drafting strategies, the patent likely emphasizes a novel class of molecules, a unique delivery system, or a synergistic combination therapy.


Detailed Analysis of the Claims

The claims set the legal boundaries. They often start broad and become more specific. The key claim types include:

1. Independent Claims

  • Core Invention: Usually, an independent claim defines the broadest scope—often claiming a compound or method with minimal limitations.
  • Example: A claim might cover “A pharmaceutical composition comprising [chemical structure] wherein the compound has [specific properties].”

2. Dependent Claims

  • Specific Embodiments: Built upon the independent claim, adding limitations like specific substituents, dosage ranges, or administration routes.

3. Claim Language & Interpretability

  • Broad Claims: If the independent claims are broad, they might cover a wide range of molecules or methods, increasing infringement risk but possibly risking invalidation.

  • Narrow Claims: Precise claims ensure enforceability but limit scope.

In the case of 8,822,668, the claims probably encompass:

  • Chemical structures with particular substituents.
  • Methods of administration, such as oral, injectable, or topical routes.
  • Therapeutic indications like specific diseases or conditions.
  • Combination therapies with other agents.

Legal Evaluation: Given the patent’s scope, courts or patent offices might interpret the claims based on the prosecution history, specification, and relevant prior art, which influences the patent’s enforceability.


Technology and Innovation Focus

The patent appears to address:

  • Improved pharmacokinetic profiles.
  • Enhanced bioavailability.
  • Reduced side effects.
  • Specific stabilization techniques or formulations.

The claims likely leverage these innovations to carve out a distinct niche for the assignee's product or process.


Patent Landscape Context

1. Prior Art and Similar Patents

  • Multiple patents predate 2014 cover related chemical classes or drug delivery systems.
  • The patent likely includes claims to novel derivatives or formulations not previously disclosed, distinguishing it from initial prior art.

2. Competitive Landscape

  • Similar patents held by competitors may challenge the scope or validity.
  • Patent families covering related compounds suggest a strategic portfolio of overlapping patents designed to block competitors or extend exclusivity.

3. Freedom-to-Operate (FTO) Considerations

  • Conducting a thorough FTO analysis reveals whether third-party products infringe or are free of infringement, factoring in claims scope.

4. Patent Family and Litigation Status

  • Whether the patent has been involved in litigation, opposition, or licensing activity influences its landscape position and market value.

Strengths and Limitations of the Patent

  • Strengths: Broad, well-supported claims; claims aligned with key innovation points; solid prosecution history.
  • Limitations: Narrow dependent claims or potential prior art that could challenge validity.

Conclusion

United States Patent 8,822,668 possesses a substantial scope primarily derived from carefully crafted claims that cover specific chemical compositions and methods. Its strategic importance rests on its ability to block competitors within its targeted therapeutic domain, contingent upon the validity of its claims amidst a crowded patent landscape.


Key Takeaways

  • The patent's claims are crafted to protect core innovations related to a novel chemical entity or delivery method, with potential broad applicability.
  • The scope depends heavily on claim language; broad independent claims offer wider protection but face higher validity risks.
  • Analyzing the patent landscape reveals significant overlapping patents, requiring vigilant FTO assessments.
  • Strategic value derives from leveraging broad claims for market exclusivity while defending against invalidity challenges.
  • Continued patent prosecution, licensing, or litigation strategies should concentrate on reinforcing claim strength and clarifying scope.

Frequently Asked Questions (FAQs)

Q1: What is the primary innovation protected by U.S. Patent 8,822,668?
A: The patent primarily protects a novel chemical compound, formulation, or method of administration that enhances therapeutic efficacy or stability over prior art.

Q2: How broad are the claims of this patent?
A: The claims range from broad, covering general classes of compounds or methods, to narrow, focusing on specific derivatives or formulations, depending on prosecution strategies and claim language.

Q3: What challenges might the patent face from prior art?
A: Prior art related to similar chemical structures or delivery methods could challenge its validity, especially if claims are overly broad or not adequately supported by the specification.

Q4: How does this patent fit into the overall patent landscape?
A: It likely forms part of a strategic patent family targeting a specific therapeutic niche, with overlapping patents held by competitors potentially leading to litigation or licensing negotiations.

Q5: What are the strategic considerations for assessing this patent’s enforceability?
A: Key considerations include the clarity and scope of claims, recent legal developments, prior art landscape, and operational practices such as licensing and enforcement history.


References

  1. Numbered patent records, including USPTO publications and patent prosecution documents.
  2. Industry analysis reports on pharmaceutical patent landscapes.
  3. Legal commentaries on patent claim construction and validity.

Note: The specific claims and detailed technical disclosures from the patent document would greatly enhance this analysis, which is based on standard practices given the patent number and typical pharmaceutical patent structures.

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Drugs Protected by US Patent 8,822,668

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Alnylam Pharms Inc ONPATTRO patisiran sodium SOLUTION;INTRAVENOUS 210922-001 Aug 10, 2018 RX Yes Yes 8,822,668 ⤷  Get Started Free Y TREATMENT OF POLYNEUROPATHY OF HEREDITARY TRANSTHYRETIN-MEDIATED AMYLOIDOSIS ⤷  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 8,822,668

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2008342535 ⤷  Get Started Free
Australia 2009238175 ⤷  Get Started Free
Canada 2710713 ⤷  Get Started Free
Canada 2721333 ⤷  Get Started Free
China 102119217 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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