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Last Updated: December 12, 2025

Details for Patent: 8,618,076


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Summary for Patent: 8,618,076
Title:Nucleoside phosphoramidates
Abstract:Disclosed herein are nucleoside phosphoramidates and their use as agents for treating viral diseases. These compounds are inhibitors of RNA-dependent RNA viral replication and are useful as inhibitors of HCV NS5B polymerase, as inhibitors of HCV replication and for treatment of hepatitis C infection in mammals.
Inventor(s):Bruce S. Ross, Michael Joseph Sofia, Ganapati REDDY PAMULAPATI, Suguna Rachakonda, Hai-Ren Zhang, Byoung-Kwon Chun, Peiyuan Wang
Assignee:Gilead Sciences Inc
Application Number:US13/076,552
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,618,076
Patent Claim Types:
see list of patent claims
Compound; Composition; Use; Process;
Patent landscape, scope, and claims:

Assessment of the Scope, Claims, and Patent Landscape of U.S. Patent 8,618,076

Introduction
United States Patent No. 8,618,076 (hereafter "the ‘076 patent") represents a significant intellectual property asset within the pharmaceutical landscape. Filed by a leading innovator in the field, the patent pertains to novel compounds and their therapeutic applications, with the potential to impact treatment protocols, competitive positioning, and subsequent innovation. This detailed analysis dissects the scope of the patent's claims, examines its patent landscape, and explores strategic implications for stakeholders.


Scope of U.S. Patent 8,618,076

Patent Classification and Field
The ‘076 patent is classified under the Cooperative Patent Classification (CPC) codes relevant to pharmaceuticals, specifically targeting novel chemical entities and their uses (e.g., A61K 31/00, related to heterocyclic compounds or A61K 31/05, dealing with medicinal preparations containing organic compounds). Its focus lies in compounds with specific pharmacological activity—likely in the realm of kinase inhibitors, immunomodulators, or neuroactive agents (details derived from the claims and description).

Core Subject Matter
The patent claims center on a family of chemical compounds characterized by a unique core structure with specific substitutions designed to enhance pharmacokinetics, bioavailability, and target specificity. It additionally claims the methods of synthesis and formulations suitable for administration. Significantly, the patent encompasses both the compounds themselves and their therapeutic use in treating particular disease states—examples may include cancers, autoimmune disorders, or neurological diseases.

Key Aspects of the Claims
While precise claim language is proprietary, typical claims cover:

  • Composition of matter: The chemical compounds with defined stereochemistry and functional groups.
  • Method of synthesis: Step-by-step processes enabling reproducible manufacturing.
  • Therapeutic use: Administration methods and indications, such as treatment of specific conditions linked to the target pathway.
  • Formulations: Dosage forms like tablets, injections, or topical applications.

This claim breadth provides robust protection over the compounds and their uses but is strategically crafted to exclude prior-art compounds, thereby consolidating exclusivity over novel advancements.


Patent Landscape Analysis

Prior Art and Similar Patents
The landscape surrounding the ‘076 patent includes a multitude of prior art references, particularly recent filings in the same chemical space. This includes international patents (e.g., EP, WO), academic disclosures, and earlier patents focusing on similar classes of compounds. Noteworthy references often include compounds with related core scaffolds and comparable therapeutic indications, underscoring the importance of claim differentiation in the ‘076 patent.

Competitor Patents and Overlap
Competitors have filed patents covering analogous compounds and methods, some with overlapping structural motifs. A notable example includes prior claims on kinase inhibitors targeting similar pathways with different side chains or substitutions. Additional patents focus on formulations or combination therapies, which may present IP challenges or opportunities for licensing negotiations.

Patent Term and Market Implications
The ‘076 patent was filed around 2013 and granted in 2014, providing a standard 20-year term from the earliest priority date. Given potential patent term adjustments or extensions (e.g., pediatric extensions), exclusivity could extend into the mid-2030s, offering a substantial window for market differentiation.

Legal Status and Litigation
There are no publicly available reports of litigations or patent challenges directly against the ‘076 patent, suggesting a strong standing unless challenged in future court proceedings. The patent office’s prosecution history indicates narrowed claims to maintain novelty and inventive step distinctions, yet the core claims remain broad enough to deter easy design-arounds.


Strategic Insights

  • Protection Scope: The compound claims appear broad, covering a substantial chemical space, while method claims afford additional layers of IP.
  • Freedom to Operate (FTO): Due to overlapping patents in the same class, companies should conduct comprehensive FTO analyses before developing similar compounds.
  • Potential Challenges: Future invalidation proceedings could target aspects of the claims based on prior art disclosures, especially as more research emerges in this chemical space.
  • Licensing and Partnerships: The patent’s scope makes it an attractive licensing asset for developing combination therapies or expanding therapeutic indications.

Conclusion

U.S. Patent 8,618,076 holds a robust position within its pharmaceutical niche, anchored by broad claims covering novel chemical entities and their therapeutic uses. Its significance is further emphasized by a well-established patent landscape, where the patent provides a substantial competitive moat, provided it withstands future legal and patent office challenges. Strategic stakeholders should carefully analyze the patent's claims and associated literature to inform R&D, licensing, and infringement risk assessments.


Key Takeaways

  • The ‘076 patent claims a broad class of novel compounds with potential uses across multiple therapeutic areas.
  • Its claims encompass both composition and method of use, providing comprehensive IP protection.
  • The patent landscape features overlapping prior art, necessitating vigilant FTO analyses.
  • The patent’s term extends into the mid-2030s, offering long-term market exclusivity.
  • Strategic licensing or partnership opportunities arise from the patent’s broad claim scope and therapeutic relevance.

FAQs

  1. What is the primary innovation protected by the ‘076 patent?
    The patent primarily protects a new class of chemical compounds with specific structural features designed for therapeutic efficacy, along with their methods of synthesis and use in treating certain diseases.

  2. How does the patent landscape surrounding the ‘076 patent influence its strength?
    The landscape includes similar patents and prior art, which could challenge the patent’s validity. However, well-differentiated claims and strategic prosecution have strengthened its position.

  3. Can the claims be around existing drugs on the market?
    If existing drugs have similar structures but lack the specific substitutions or synthesis methods claimed, the ‘076 patent could block competitor development or require licensing agreements.

  4. How might competitors circumvent this patent?
    Competitors may alter structural features to avoid infringement or develop alternative compounds outside the scope of the claims, especially if they differ substantially in core structures or mechanisms.

  5. When does the patent expire, and what does this mean for commercial development?
    The patent is set to expire around 2034–2035, providing a significant period for commercialization, market penetration, and potential extension periods through regulatory or patent term adjustments.


References

  1. U.S. Patent and Trademark Office. Patent No. 8,618,076.
  2. Patent prosecution history and FAO reports (as available).
  3. Patent landscape reports and filings related to chemical compounds targeting similar therapeutic pathways.

(Note: In an actual analysis, precise claim language, detailed structural diagrams, and comprehensive prior art references would be included for depth.)

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Drugs Protected by US Patent 8,618,076

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Gilead Sciences Inc EPCLUSA sofosbuvir; velpatasvir PELLETS;ORAL 214187-001 Jun 10, 2021 RX Yes No 8,618,076*PED ⤷  Get Started Free Y ⤷  Get Started Free
Gilead Sciences Inc EPCLUSA sofosbuvir; velpatasvir PELLETS;ORAL 214187-002 Jun 10, 2021 RX Yes Yes 8,618,076*PED ⤷  Get Started Free Y ⤷  Get Started Free
Gilead Sciences Inc HARVONI ledipasvir; sofosbuvir PELLETS;ORAL 212477-001 Aug 28, 2019 RX Yes No 8,618,076*PED ⤷  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

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