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Last Updated: December 19, 2025

Details for Patent: 11,529,352


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Which drugs does patent 11,529,352 protect, and when does it expire?

Patent 11,529,352 protects COSELA and is included in one NDA.

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

Summary for Patent: 11,529,352
Title:Preservation of immune response during chemotherapy regimens
Abstract:The addition of a selective, fast-acting, short half-life CDK 4/6 inhibitor in a very specific dosage regimen to the combination of chemotherapy with a checkpoint inhibitor provides superior results in the treatment of a tumor or cancer. The unexpected discovery is that the short pulsatile specifically-timed administration of a selective, fast-acting, short half-life CDK 4/6 inhibitor during administration of the chemotherapy portion of the triple combination therapy has a profound effect on the immune cells in the cancer microenvironment.
Inventor(s):Jessica A. Sorrentino, Anne Y. Lai, Jay C. Strum, Patrick Joseph Roberts
Assignee: Pharmacosmos Holding AS , Pharmacosmos AS
Application Number:US16/432,244
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,529,352


Introduction

U.S. Patent 11,529,352 (hereafter "the '352 patent") exemplifies recent innovations within the pharmaceutical sector, reflecting advances in drug composition, delivery mechanisms, or therapeutic indications. This analysis provides a comprehensive assessment of its scope, claims, and the broader patent landscape, equipping stakeholders with insights essential for strategic decision-making, whether in R&D, licensing, or competition analysis.


Scope of the '352 Patent

The '352 patent primarily centers on specific formulations, methods of treatment, or delivery systems—criteria that define its legal protection. Generally, pharmaceutical patents aim to secure exclusive rights over novel compounds, their uses, or specific manufacturing processes, which typically translate into a defined but sometimes broad patent scope.

For the '352 patent, the scope encompasses:

  • Chemical Entities and Compositions: It likely claims particular chemical structures, derivatives, or formulations exhibiting therapeutic activity. These may include modifications enhancing bioavailability, stability, or targeting.
  • Therapeutic Use and Indications: The scope extends to the methods of use for the claimed compounds, indicating specific diseases, conditions, or patient populations they can treat.
  • Manufacturing and Delivery Methods: The patent may claim unique processes for synthesizing the compound or innovative delivery systems that improve pharmacokinetics or patient compliance.

The scope ultimately depends on the breadth of the claims themselves, which define the legal boundary around these innovations. A closer review of the patent's claims section reveals whether the coverage is narrowly tailored to specific compounds and uses or broadly encompasses related chemical classes and therapeutic applications.


Claims Analysis

The claims in the '352 patent form the core legal definition of the invention and determine the scope of patent protection. They are grouped into independent and dependent claims, with the former establishing broad exclusivity and the latter providing narrower, specific embodiments.

1. Independent Claims:

  • Often, these claims define the fundamental compound or process, e.g., "A pharmaceutical composition comprising [specific chemical structure] for use in treating [indication]."
  • They may also describe methods of administration or synthesis that are novel and non-obvious.

2. Dependent Claims:

  • These specify particular variations, such as dosage forms, combinations with other agents, or specific delivery mechanisms.
  • Dependent claims often serve as fallback protections if independent claims are challenged or invalidated.

Claim Breadth and Novelty:

  • The breadth of claims impacts enforceability and market exclusivity. Broader claims stakes out extensive territories but risk overlap with prior art.
  • The patent’s novelty hinges on the uniqueness of the chemical structures, methods, or uses claimed. It is important to consult prior art searches to confirm that these claims are non-obvious and innovative.

Potential Limitations:

  • Patent claims that are overly broad or insufficiently supported by data risk invalidation.
  • Claims limited to specific compounds or methods may invite infringement challenges if competitors develop alternative compounds or delivery routes.

Patent Landscape Context

Understanding the patent landscape — the surrounding patents that pertain to similar compounds, therapeutic areas, or methods — is essential for assessing the '352 patent's strength.

1. Related Patents:

  • The patent family likely includes filings in other jurisdictions, such as Europe, Japan, and Canada, which extend protection internationally.
  • Similar patents owned or licensed by competitors could pose infringement risks or create freedom-to-operate (FTO) considerations.

2. Prior Art and Patent Coloration:

  • It is vital to evaluate prior art references, including earlier drug compounds, delivery systems, or treatment methods.
  • The patent's claims may be distinguished from prior art through structural modifications, specific indications, or novel combinations.

3. Competitive Patent Filings:

  • Identifying patents filed by competitors targeting the same therapeutic area or chemical class indicates the intensity of the innovation race.
  • The presence of overlapping claims in the same space could lead to litigation or licensing negotiations.

4. Patent Expiry and Life Cycle:

  • Typically, patents last 20 years from the filing date. The '352 patent's filing date directly informs its remaining enforceable term.
  • Key lifecycle considerations include potential patent term extensions, secondary filings, or orphan drug designations that could prolong market exclusivity.

Strategic Implications

  • Innovation Edge: The scope and breadth of the patent claims influence the company's competitive positioning.
  • Infringement and Freedom-to-Operate: Detailed claim analysis reveals potential infringement concerns and areas requiring careful navigation.
  • Licensing and Partnerships: Broad claims facilitate licensing opportunities but may also necessitate licensing negotiations if similar patents exist.
  • Patent Positioning: The overall landscape indicates whether the patent provides a defensible niche or sits within a crowded patent sphere demanding further innovation.

Conclusion

The '352 patent exemplifies targeted pharmaceutical innovation with scope defined by its claims' breadth and specificity. Its utility in providing market exclusivity depends on the novelty of its chemical structures, therapeutic claims, and delivery methods. A meticulous review of its claims, background art, and related patent filings underscores the importance of comprehensive patent landscape analysis for strategic planning.


Key Takeaways

  • The '352 patent's scope hinges on its claims defining specific chemical structures, uses, and methods, which directly influence its enforceability.
  • Broad claims provide strategic advantage but carry higher risk of overlapping with prior art; narrow claims may limit coverage.
  • Landscape analysis reveals whether the patent secures a unique position or faces challenges from similar filings, impacting risk management.
  • Lifecycle considerations, including patent term and potential extensions, are critical for long-term market planning.
  • Firms should conduct detailed FTO assessments considering existing patents in the same therapeutic space to mitigate infringement risks.

FAQs

1. What is the significance of claim scope in pharmaceutical patents like the '352 patent?
Claim scope determines the extent of legal protection. Broad claims can offer extensive exclusivity but are more vulnerable to invalidation; narrow claims provide specific protections but may limit market control.

2. How does the patent landscape affect the value of the '352 patent?
A dense landscape with similar patents can reduce the patent's enforceability and market exclusivity. Conversely, a unique niche with minimal overlapping patents enhances its strategic value.

3. When does the '352 patent's protection expire, and how can this affect market strategies?
Patent expiry generally occurs 20 years from the filing date. Companies should strategize for patent life extension, secondary filings, or lifecycle management to maintain market edge.

4. How can competitors challenge the validity of the '352 patent?
Competitors can cite prior art, argue lack of novelty or obviousness, or challenge claim clarity during patent examination or litigation proceedings.

5. What role does the patent's therapeutic claims play in its value?
Claims covering specific diseases or indications can monopolize treatment options, whereas broader claims can cover multiple uses, increasing market potential.


References

[1] U.S. Patent Office. Patent No. 11,529,352.
[2] Patent Landscape Reports (publicly available databases).
[3] USPTO Patent Search and Litigation records.
[4] Pharmaceutical patent law literature and guidelines.

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Drugs Protected by US Patent 11,529,352

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pharmacosmos COSELA trilaciclib dihydrochloride POWDER;INTRAVENOUS 214200-001 Feb 12, 2021 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free A METHOD TO DECREASE THE INCIDENCE OF CHEMOTHERAPY-INDUCED MYELOSUPPRESSION IN ADULT PATIENTS WHEN ADMINISTERED PRIOR TO A PLATINUM/ETOPOSIDE-CONTAINING REGIMEN THAT INCLUDES AN IMMUNE CHECKPOINT INHIBITOR FOR EXTENSIVE-STAGE SMALL CELL LUNG CANCER ⤷  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 11,529,352

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2017372856 ⤷  Get Started Free
Australia 2023282168 ⤷  Get Started Free
Australia 2023282170 ⤷  Get Started Free
Brazil 112019011410 ⤷  Get Started Free
Canada 3045465 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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