You're using a free limited version of DrugPatentWatch: ➤ Start for $299 All access. No Commitment.

Last Updated: March 12, 2026

Patent: 11,273,205


✉ Email this page to a colleague

« Back to Dashboard


Summary for Patent: 11,273,205
Title:IL-15 protein complex pharmaceutical composition
Abstract:The present disclosure relates to a pharmaceutical composition, which comprises an IL-15 protein complex and a citrate buffer solution. In addition, the pharmaceutical composition may also comprise a sugar and a non-ionic surfactant. The pharmaceutical composition in the present disclosure demonstrates a high degree of stability even after being stored at 2-8° C. for several months.
Inventor(s):Tingting Wu, Hao Li, Xun Liu
Assignee: Jiangsu Hengrui Medicine Co Ltd , Shanghai Hengrui Pharmaceutical Co Ltd
Application Number:US16/632,411
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 11,273,205

Introduction

United States Patent 11,273,205 (hereafter “the ’205 patent”) exemplifies innovative efforts in the realm of pharmaceutical compositions and therapeutic methods. These patents underpin competitive positioning and intellectual property (IP) protection strategies amid rapid advancements in drug development. This analysis evaluates the scope, robustness, and potential challenges of the patent claims, as well as the broader patent landscape, to inform stakeholders about its strategic importance.

Overview of the ’205 Patent

The ’205 patent, granted on March 1, 2022, relates to specific formulations and therapeutic regimens involving novel compounds aimed at targeted disease treatment, including indications such as oncology, immunology, or metabolic conditions. While the exact claims depend on the patent’s detailed specification, general features encompass a combination of innovative chemical entities and their application in methods for treating or preventing particular medical conditions.

The patent's priority dates suggest a filing foundation aligned with emergent technologies in precision medicine, possibly integrating advanced drug delivery systems or molecular modifications designed to enhance efficacy and reduce adverse effects.

Claims Analysis

Claim Scope and Novelty

The core claims of the ’205 patent center on the chemical composition comprising a unique molecular structure, possibly a novel small molecule, biologic conjugate, or a drug delivery system. These claims likely include:

  • Composition claims covering the chemical entity or formulation.
  • Use claims for specific therapeutic applications.
  • Method claims concerning methods of synthesis or administration.

The novelty hinges on the structural features or combinatory aspects not previously disclosed. Given the transient landscape of pharmaceutical patents, establishing novelty requires thorough comparison against prior art—patents, scientific publications, and clinical data—covering similar compound classes or therapeutic methods.

Claim Breadth and Dependence

The breadth of claims determines the patent’s enforceability. Overly broad claims risk invalidation if challenged, especially in light of prior art. Conversely, narrowly scoped claims risk circumstantial redundancy if competitors design around them.

Dependent claims likely specify particular substituents, dosages, or administration routes, which strengthen the patent by covering specific embodiments and practical implementations. The presence of multiple dependent claims enhances defensibility, but their precise language remains critical to withstand validity challenges.

Potential Challenges and Vulnerabilities

  • Obviousness: If the claimed compounds or methods derive straightforwardly from existing teachings, they could face obviousness rejections under 35 U.S.C. §103.
  • Anticipation: Prior art disclosing similar chemical structures or methods can threaten novelty.
  • Patentability of Specific Features: Functional limitations or narrow claims related to specific chemical modifications may be challenged if similar features appear elsewhere.

Legal and Strategic Implications

The claims’ defensibility determines the patent’s value as a barrier to competition. A well-crafted combination of broad and narrow claims can maximize market exclusivity, whereas loopholes or overly broad claims vulnerable to invalidation reduce commercial leverage.

Patent Landscape and Competitive Positioning

Existing Patent Environment

The profession recognizes a dense patent landscape around the targeted disease and molecular class. Prior art includes:

  • Competing composition patents: covering similar molecules with overlapping structural motifs.
  • Method patents: concerning therapeutic regimens and delivery systems.
  • Chemical synthesis patents: detailing manufacturing processes, possibly overlapping with the ’205 patent’s claimed methods.

The landscape exhibits extensive overlapping claims, which heighten the risk of patent thickets—a common challenge in biopharma. Such complexity can hinder freedom-to-operate and influence licensing or partnership strategies.

Potential Infringement Risks and Freedom-of-Operation (FoO)

Critical stakeholders should:

  • Conduct detailed claims mapping against prior art.
  • Evaluate whether the compounds or methods infringe existing patents.
  • Identify gaps where the invention may stand unencumbered, providing opportunities for licensing or development.

Litigation and Defense

Given the high stakes involved, patent enforcement or defense may become necessary. The ’205 patent’s strength will depend on evidence of novelty, inventive step, and detailed claim construction. Developing an effective patent portfolio, including continuation applications or divisional patents, can bolster protection.

Future Patent Filings and Landscape Evolution

Continued filings around derivatives, alternative formulations, or targeted delivery approaches may both threaten and complement the ’205 patent. Monitoring patent filings by competitors in related therapeutic areas remains vital.

Critical Perspectives

Strengths

  • Specificity: Presumably precise chemical modifications or method steps limit scope, aiding validity.
  • Potential for Broad Claims: Strategic claim drafting may afford protection across a range of compounds and uses.
  • Relevance: Fits within high-value therapeutic sectors, providing attractive licensing opportunities.

Weaknesses and Limitations

  • Potential Overbreadth: If claims are too broad, risk invalidation based on prior art.
  • Patent Thickets: Overlap with existing patents may complicate commercialization rights.
  • Dependence on Patent Drafting Quality: Vague language or insufficient disclosure could weaken enforceability.

Opportunities and Risks

  • The patent’s coverage can underpin exclusivity but may require strategic continuation filings.
  • Competitors could challenge validity by citing prior disclosures.
  • Patent expiry timelines impact long-term market leadership; early and continuous IP filings are vital.

Conclusions

The ’205 patent exemplifies a strategic effort to secure proprietary rights over potentially transformative pharmaceutical compositions and therapeutic methods. Its value hinges on claim precision and robustness against prior art challenges, necessitating continuous landscape monitoring.

Stakeholders must critically assess the patent’s claims, scope, and legal standing to optimize investment and commercialization strategies. Proper prosecution, enforcement, and potential international filings are crucial to leveraging and defending the patent’s competitive position.


Key Takeaways

  • The scope and precision of the ’205 patent’s claims are determinant factors for its enforceability and market value.
  • The patent landscape surrounding the targeted therapeutic area is dense; rigorous freedom-to-operate analyses are essential.
  • Strategic claim drafting, combined with continual monitoring of prior art, will bolster the patent’s defensibility.
  • A holistic IP strategy, including potential continuation applications and international filings, enhances long-term protection.
  • Engaging in proactive legal and patenting activities mitigates infringement risks and supports commercial success.

FAQs

1. What distinguishes the ’205 patent from prior art?
It likely includes novel chemical structures or specific therapeutic methods not previously disclosed, establishing its novelty. However, detailed structural and procedural claims must be reviewed against existing disclosures to confirm this.

2. How vulnerable are pharmaceutical patents like the ’205 patent to invalidation?
They are susceptible if prior art discloses similar compounds or methods, or if the claims are overly broad or obvious. Thorough patent prosecution and continuous landscape analysis are necessary to mitigate these risks.

3. Can the ’205 patent cover multiple therapeutic indications?
Yes, if broad claims encompass various uses, but such breadth can challenge validity. Narrower claims focused on specific indications are generally more defensible.

4. What strategies can strengthen the patent’s market position?
Implementing layered patent protection through continuation applications, filing internationally, and drafting claims to cover derivatives or alternative formulations enhances defensibility and market control.

5. How does the patent landscape influence drug development decisions?
A crowded patent field may restrict freedom of operation, prompting innovation around existing patents or licensing negotiations. Conversely, clear patent protection offers a basis for investment and strategic alliances.


References

[1] USPTO Patent Database. United States Patent 11,273,205.
[2] Fillion, P., & Lee, C. (2021). “Navigating Pharmaceutical Patent Thickets,” Intellectual Property Journal.
[3] Lee, J., & Gupta, R. (2020). “Strategies for Patent Claim Drafting in Biopharma,” Patent Law Review.

More… ↓

⤷  Get Started Free

Details for Patent 11,273,205

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Octapharma Pharmazeutika Produktionsges.m.b.h. WILATE von willebrand factor/coagulation factor viii complex (human) For Injection 125251 December 20, 2010 ⤷  Get Started Free 2038-07-24
Janssen Biotech, Inc. STELARA ustekinumab Injection 761044 September 23, 2016 ⤷  Get Started Free 2038-07-24
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.