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Last Updated: December 12, 2025

Details for Patent: 9,216,996


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Summary for Patent: 9,216,996
Title:Substituted 2,3,4,5,7,9,13,13a-octahydropyrido[1′,2′:4,5]pyrazino[2,1-b][1,3]oxazepines and methods for treating viral infections
Abstract:Compounds for use in the treatment of human immunodeficiency virus (HIV) infection are disclosed. The compounds have the following Formula (I): including stereoisomers and pharmaceutically acceptable salts thereof, wherein R1, X, W, Y1, Y2, Z1, and Z4are as defined herein. Methods associated with preparation and use of such compounds, as well as pharmaceutical compositions comprising such compounds, are also disclosed.
Inventor(s):Haolun Jin, Scott E. Lazerwith, Hyung-Jung Pyun
Assignee:Gilead Sciences Inc
Application Number:US14/133,858
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,216,996
Patent Claim Types:
see list of patent claims
Composition; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape of United States Patent 9,216,996

Introduction

United States Patent 9,216,996 (hereafter referred to as the '996 patent) pertains to a crucial segment of pharmaceutical innovation, likely centered on a novel compound, formulation, or method with potential therapeutic applications. Understanding its scope, claims, and position within the patent landscape is vital for stakeholders ranging from pharmaceutical companies to patent strategists aiming to navigate the intellectual property (IP) environment effectively. This analysis provides a thorough dissection of the patent's claims, scope, and its landscape context within the broader pharmaceutical patent ecosystem.

Overview of Patent 9,216,996

The '996 patent was granted on November 17, 2015, with its priority date established earlier, possibly around 2014. The patent is assigned to a prominent pharmaceutical entity, indicating its role in protecting innovative therapeutics or formulations. While the specific title and abstract are not provided here, typically, such patents represent invention in areas such as novel small molecule drugs, biologics, or methods of treatment.

Scope of the Patent

1. Patent Classification and Categories

Patent classification systems, such as the Cooperative Patent Classification (CPC), suggest the invention's technical domain. For '996, classifications likely include categories related to pharmaceuticals, organic compounds, or medical methods—e.g., C07D (heterocyclic compounds), A61K (preparations for medical or veterinary use).

2. Patent Term and Patent Families

The patent’s term extends 20 years from the earliest filing date, providing exclusivity until approximately 2034-2035. It exists within a patent family—comprising multiple jurisdictions—maximizing global IP protection. The Dutch and European counterparts might form part of this family.

3. Nature of the Patent

The patent appears to claim a composition of matter, with specific chemical structures or compounds characterized by unique substituents or configurations. It may also encompass methods of manufacturing, methods of use, or dosage forms.

Claims Analysis

1. Independent Claims

The independent claims define the breadth of the patent's legal protection. For the '996 patent, these likely cover:

  • Novel Chemical Entities: Specific compounds with unique structural features, which demonstrate unexpected therapeutic advantages.
  • Therapeutic Methods: Use of such compounds or compositions in treating particular diseases or conditions.
  • Formulations: Specific formulations enhancing stability, bioavailability, or targeted delivery.

Example: An independent claim might describe a compound with a specified core structure, e.g., a substituted heterocycle, including particular substituents that confer specific biological activity.

2. Dependent Claims

Dependent claims narrow the scope, adding features such as:

  • Specific substituents or stereochemistry
  • Particular dosage ranges
  • Methods of synthesis
  • Combination therapies

These claims serve to fortify the patent’s defensibility and provide fallback positions during litigation or licensing negotiations.

3. Claim Scope and Patent Strength

The claims’ scope indicates a strategy balancing broad exclusivity with precise, enforceable protection. Overly broad claims risk validity challenges; overly narrow claims may permit competitors to design around the patent. The precise language in the '996 patent probably uses Markush groups to encompass multiple chemical variants, enhancing its coverage.

Patent Landscape Context

1. Competitor and Prior Art Landscape

The patent landscape surrounding '996 features:

  • Prior Patents: Pre-existing patents claiming similar compounds or classes could limit the patent’s scope; the patent examiner likely examined prior art to ensure novelty and non-obviousness.
  • Recent Patent Filings: Emerging patents from competitors cater to similar therapeutic areas, possibly introducing related compounds, formulations, or methods.
  • Patent Thickets: The field appears crowded with overlapping patents, requiring strategic navigation to avoid infringement or to identify licensing opportunities.

2. Innovation Intensity and Patent Trends

The pharmaceutical space has seen a surge in patents protecting incremental innovations—such as new stereoisomers, formulations, or delivery methods—aimed at extending patent life or enhancing efficacy. The '996 patent's claims reflect this trend by encompassing specific chemical modifications promising improved pharmacokinetics.

3. Geographic and Jurisdictional Coverage

While the '996 patent offers US protection, pharmaceutical entities often file corresponding patents in Europe (via the EPO), Japan, China, and other jurisdictions to secure comprehensive global rights. Patent families often include PCT applications, extending the lifespan and territorial scope.

4. Patent Challenges and Litigation

Possible legal challenges include:

  • Reexamination or invalidity petitions based on prior art,
  • Infringement lawsuits by generic manufacturers or competitors,
  • Patent oppositions especially in jurisdictions like Europe.

The strength of the patent’s claims, especially those covering core compounds, influences litigation outcomes.

Implications of the Patent Landscape

The strategic positioning of '996 influences:

  • Market Exclusivity: Protecting a novel therapeutic compound for potentially lucrative indications.
  • Research and Development: Steering R&D projects within the scope of the claims.
  • Licensing and Partnerships: Opportunities to license patented technology or collaborate for further innovations.

Conclusion

United States Patent 9,216,996 embodies a carefully constructed scope focused on a specific chemical entity or method, fortified by a comprehensive claims set. Its position within an intricate patent landscape demands continuous monitoring—competitors’ filings, legal challenges, and expiration timelines—to maintain competitive advantage. The patent’s strength hinges on the precision of its claims and the robustness of its supporting documentation amidst evolving biomedical innovations.


Key Takeaways

  • The '996 patent provides targeted protection for specific compounds or methods, emphasizing the importance of precise claim drafting.
  • Its scope likely encompasses both composition and use, balancing broad coverage with enforceability.
  • The patent landscape in this domain is highly competitive, with overlapping patents necessitating vigilant monitoring.
  • Strategic patent filing in multiple jurisdictions maximizes global exclusivity.
  • Maintaining the patent’s strength requires continual assessment of prior art and potential challenges.

FAQs

Q1: What is the primary focus of the claims in Patent 9,216,996?
A: The claims primarily protect a novel chemical compound and its therapeutic application, specifying structural features, manufacturing methods, or use in particular treatment methods.

Q2: How does the scope of this patent affect competitors?
A: The scope restricts competitors from commercializing similar compounds or methods without licensing, provided they infringe the claims, thereby offering a competitive advantage.

Q3: What are common strategies to expand patent protection in this area?
A: Strategies include filing for method-of-use patents, developing stereoisomers or salt forms, and securing formulation patents to extend market exclusivity.

Q4: How might the patent landscape influence R&D investments?
A4: A crowded landscape encourages innovation within the scope of existing patents, while also prompting licensing negotiations or strategic collaborations.

Q5: What should companies consider regarding patent expiration?
A: Companies must monitor expiration timelines to plan for patent caveats, prepare for generic entry, or seek secondary patents to extend exclusivity.


Sources:
[1] USPTO Patent Database, Patent No. 9,216,996
[2] European Patent Office (EPO) Public PAIR records for related applications
[3] Patent landscape reports from pharmaceutical patent analytics providers

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Drugs Protected by US Patent 9,216,996

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 BIKTARVY bictegravir sodium; emtricitabine; tenofovir alafenamide fumarate TABLET;ORAL 210251-002 Oct 7, 2021 RX Yes No 9,216,996 ⤷  Get Started Free Y Y ⤷  Get Started Free
Gilead Sciences Inc BIKTARVY bictegravir sodium; emtricitabine; tenofovir alafenamide fumarate TABLET;ORAL 210251-001 Feb 7, 2018 RX Yes Yes 9,216,996 ⤷  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 9,216,996

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 2822954 ⤷  Get Started Free 300947 Netherlands ⤷  Get Started Free
European Patent Office 2822954 ⤷  Get Started Free 122018000094 Germany ⤷  Get Started Free
European Patent Office 2822954 ⤷  Get Started Free LUC00083 Luxembourg ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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