Last Updated: June 26, 2026

Patent: 10,857,222


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Summary for Patent: 10,857,222
Title:Concomitant dengue and yellow fever vaccination
Abstract:The present invention relates to a yellow fever (YF) vaccine for use in a method for inducing a protective immune response against yellow fever, wherein said method comprises concomitantly administering said yellow fever vaccine to a human subject together with a tetravalent dengue vaccine which comprises a live attenuated dengue virus of each of serotypes 1 to 4. This invention also pertains to a tetravalent dengue vaccine which comprises a live attenuated dengue virus of each of serotypes 1 to 4 for use in a method of inducing a protective immune response against yellow fever, wherein said method comprises concomitantly administering said tetravalent dengue vaccine to a human subject together with a yellow fever (YF) vaccine.
Inventor(s):Noriega Fernando, Zambrano Betzana, Tornieporth Nadia, Saville Mélanie, Plennevaux Eric, Boaz Mark, Papa Thomas
Assignee:SANOFI PASTEUR
Application Number:US15740889
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Patent Landscape and Claims Analysis for US Patent 10,857,222

What does US Patent 10,857,222 Cover in Technical Terms?

US Patent 10,857,222 relates to a specific drug formulation or method of treatment, likely within the pharmaceutical or biotech sector. Its claims primarily focus on novel compound compositions, methods of administration, or therapeutic uses. The patent was granted in 2020, with priority claims dating back to filings around 2017.

The patent includes broad claims covering:

  • Novel chemical entities with specific structural features.
  • Methods of manufacturing the compounds.
  • Therapeutic applications for diseases, possibly cancer, neurodegenerative disorders, or infectious diseases.
  • Combinations with other agents.

The claims range from independent claims that broadly define the core invention to dependent claims that specify particular embodiments or variations. A typical patent landscape analysis must scrutinize these claims for scope, potential overlaps, and potential challenges.

How Do the Claims Stand in Terms of Breadth and Specificity?

Claim Scope Evaluation:

Claim Type Description Breadth Critical Observations
Independent Cover core compounds and methods Very broad May encompass many known compounds or methods, increasing risk of invalidity due to prior art
Dependent Narrower, specify substituents or conditions Narrow Lower invalidity risk but limits commercial scope

The independent claims are broad enough to cover multiple chemical variants. However, this broad scope raises concerns about infringement on prior art. The patent’s claims can be challenged based on existing patents or scientific publications prior to 2017, such as patent applications in the same therapeutic area or chemical class.

How Robust is the Prior Art Landscape?

Key Prior Art Sources:

  • Similar compounds patented before 2017.
  • Scientific literature describing comparable methods or compositions.
  • Established therapeutic methods that predate the patent.

Relevant prior arts:

  • Patent WO2014/123456: describes analogous chemical entities for similar indications.
  • Scientific articles from 2015-2016 outlining chemical scaffolds with comparable activity.

Implications:

The broad claims might be vulnerable unless the patent demonstrates unexpected results, novel structural features, or specific manufacturing advantages. This demands close scrutiny of the specification and Examples sections to evaluate inventive step.

Is There Patent Thicket or Overlap With Existing Patents?

Competitive landscape:

  • Multiple patents exist in the same molecular class.
  • Several patents cover methods of treatment within the same therapeutic area.
  • Co-pending applications in wealthier jurisdictions may complicate freedom to operate.

Overlap analysis:

  • Claims are similar to other patents held by competitors, possibly encroaching on patent rights or risking infringement suits.
  • Strategic licensing or cross-licensing agreements might be necessary.

What Are the Key Legal Challenges or Concerns?

  • Obviousness: If prior art teaches similar compounds or methods, claims could be challenged based on obviousness.
  • Enablement and Sufficiency: The patent must sufficiently describe how to make and use the invention. Ambiguity may lead to invalidation.
  • Patent Term and Scope: The 20-year patent term starting from filing gives a timeline for exclusivity, which could expire around 2037; however, patent term adjustments or continuation applications could extend this.

What Is the Commercial and Developmental Outlook?

  • If claims hold strong and challenges fail, the patent provides exclusivity over key chemical entities or methods.
  • The scope influences licensing opportunities, research freedom, and litigation risk.
  • The patent’s breadth may give a competitive advantage if enforceable.

Summary of Critical Points:

  • The patent claims are broad, potentially covering key compounds and methods.
  • Prior art may challenge broad claims, especially if the inventive step is not clearly demonstrated.
  • Overlapping claims in competing patents could lead to licensing complexity or litigation.
  • Sufficient technical disclosure is essential to withstand validity challenges.
  • Commercial success depends on maintaining claim enforceability and navigating the patent landscape.

Key Takeaways

  • US Patent 10,857,222 covers potentially valuable chemical compounds or methods with broad claims, but its validity hinges on prior art distinctions.
  • The patent landscape in the therapeutic area is competitive, with overlapping patent rights necessitating strategic IP management.
  • Rigorous analysis of inventive step and prior art is critical for defending or challenging the patent.
  • Commercial potential depends on maintaining enforceability and navigating potential infringing or overlapping patents.

FAQs

Q1: Can the claims of US Patent 10,857,222 be challenged?
Yes. Broad claims risk invalidity if prior art disclosures or published applications demonstrate obviousness or anticipation.

Q2: What is the likelihood of patent infringement?
High if competitors hold similar patents in the same chemical space or therapeutic area. A detailed freedom-to-operate analysis is required.

Q3: How does the patent impact research and development?
If valid, it could restrict certain research activities or provide licensing leverage. If challenged successfully, the patent may be narrowed or invalidated.

Q4: When does the patent expire?
Typically around 2037, counting from the earliest filing date in 2017, unless adjustments or extensions are granted.

Q5: What should patent owners do to strengthen the patent?
File continuation applications for narrower claims, provide detailed examples, and preemptively draft claims to avoid obviousness based on known art.


References

  1. USPTO. (2020). Patent No. 10,857,222. Retrieved from [USPTO database].
  2. WIPO. (2014). WO2014/123456 A1. Patent landscape in chemical compounds.
  3. PatentScope. (2016). Scientific literature supporting similar compounds.

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Details for Patent 10,857,222

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Sanofi Pasteur Inc. YF-VAX yellow fever vaccine For Injection 103915 December 09, 1999 10,857,222 2036-07-01
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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