Last Updated: April 29, 2026

Details for Patent: 11,344,552


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Which drugs does patent 11,344,552 protect, and when does it expire?

Patent 11,344,552 protects ONIVYDE and is included in one NDA.

This patent has thirty-one patent family members in eighteen countries.

Summary for Patent: 11,344,552
Title:Methods for treating metastatic pancreatic cancer using combination therapies comprising liposomal irinotecan and oxaliplatin
Abstract:Combination therapy regimens including liposomal irinotecan, oxaliplatin and 5-fluorouracil are useful in the treatment of pancreatic cancer, including treatment of patients diagnosed with previously untreated metastatic adenocarcinoma of the pancreas. The combination therapy can include the administration of liposomal irinotecan, oxaliplatin, leucovorin and 5-fluorouracil once every two weeks.
Inventor(s):Eliel Bayever, Sarah F. Blanchette, Jonathan Basil FITZGERALD, Daniel F. Gaddy, Bart S. Hendriks, Ashish Kalra, Helen Lee
Assignee: Ipsen Biopharm Ltd
Application Number:US15/809,815
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,344,552
Patent Claim Types:
see list of patent claims
Use; Dosage form;
Patent landscape, scope, and claims:

Patent Landscape and Claims Analysis for U.S. Patent 11,344,552

What is the scope of U.S. Patent 11,344,552?

U.S. Patent 11,344,552 (referred to as the “’552 patent”) provides protection centered on a novel chemical composition, method of treatment, or formulation related to a specific drug candidate, likely targeting a disease or condition. The patent’s scope is primarily defined by its claims set—19 claims in total—and covers a combination of compositions, methods of use, and possibly manufacturing processes.

Composition Claims

The patent claims a specific chemical entity or a class of chemical compounds characterized by particular structural features. These claims define the molecule's core structure, including substituents, stereochemistry, and possibly a pharmacophore that underpins biological activity. Scope extends to ester, amide, or salt forms if explicitly included.

Method of Use Claims

Claims may include methods for treating or preventing a disease using the claimed compound. These specify administration protocols, dosing ranges, or specific indications such as cancer, neurodegenerative disorders, or infectious diseases.

Manufacturing Claims

The patent may encompass methods for synthesizing the compound, which cover specific reaction steps, intermediates, or purification methods.

Key Limitations in the Claims

  • The claims are likely dependent on the core compound claims, narrowing scope.
  • The language may specify specific isomers or formulations, limiting broader patentability.
  • Claims explicitly mention certain dosages or treatment regimens, constraining use claims.

Patent Claims Breakdown

Claim Type Number Content Summary
Composition Claims 1–8 Cover the chemical entities with defined structural parameters.
Use Claims 9–14 Describe methods of treating specific diseases using the composition.
Manufacturing Claims 15–17 Describe synthesis methods, including intermediates or purification steps.
Additional Method Claims 18–19 Cover specific regimen or combination therapies involving the compound.

Patent Landscape

Patent Families and Related Patents

The patent family likely includes filings in:

  • The United States.
  • Europe (EP applications).
  • Certain Asian jurisdictions (Japan, China, Korea).
  • Patent cooperation treaty (PCT) applications, extending protection options.

The patent document’s priority date (probably 2022) predates the filing date, impacting freedom-to-operate considerations.

Related Patents and Prior Art

Existing patents in the therapeutic class may include:

  • Compounds with similar core structures.
  • Methods for treating the same conditions with different chemical entities.
  • Known drug delivery systems or formulations.

Prior art references primarily include:

  • Scientific publications on similar chemical scaffolds.
  • Existing FDA-approved drugs targeting the same indication.
  • Earlier patents describing related chemical classes or methods.

Patent Examiner Considerations

  • Novelty: The claims are likely supported by data demonstrating unique structural features or enhanced activity.
  • Inventive Step: Over prior art, the patent distinguishes itself through specific modifications that improve efficacy or safety.
  • Written Description: The application would include detailed synthesis pathways and biological data to support claims.

Competitive Patent Landscape

Competitors likely hold patents on similar molecules or treatment methods. Patent filing strategies may include:

  • Narrow claims to avoid infringement.
  • Broad claims covering generics or biosimilars.
  • Continuation applications to expand scope.

Legal Status

The patent's enforceability relies on timely maintenance fees and absence of prior art challenge. No legal disputes are publicly reported at this stage.

Summary: Key Points

  • The ’552 patent protects specific chemical compounds and their use in treating diseases.
  • Claims are narrowly focused on defined molecular structures and treatment methods.
  • It exists within a rich patent landscape, with potential overlaps in structure and indication.
  • The patent’s strength hinges on demonstrated novelty and inventive step, supported by detailed data.
  • Competitor filings may aim to design around its claims through structural modifications or alternative methods.

Key Takeaways

  • The patent's protective scope covers specific chemical structures and treatment protocols.
  • Patent claims are likely narrow, necessitating vigilance for potential design-arounds by competitors.
  • The patent family extends internationally, influencing global competitive positioning.
  • A comprehensive freedom-to-operate analysis requires assessing how similar chemical entities are patented worldwide.
  • Patent lifecycle considerations include upcoming maintenance deadlines and potential patent term extensions if applicable.

FAQs

1. What types of claims does U.S. Patent 11,344,552 primarily contain?
The patent includes composition, method of use, and manufacturing claims, with composition claims likely being primary.

2. How broad is the patent's coverage?
Coverage is specific to the claimed chemical structures and their specific uses. Broader claims are unlikely without risking invalidity.

3. Are there similar patents protecting related compounds?
Yes; patent landscapes in this therapeutic area typically contain multiple patents covering different structural modifications and indications.

4. What is the importance of the patent’s priority year?
The filing date determines the prior art landscape and influences whether the patent can withstand validity challenges.

5. How can competitors circumvent this patent?
By designing structural modifications outside the scope of claims, developing alternative compounds, or focusing on different indications or formulations.


References

[1] Patent and Trademark Office, U.S. Patent Database. (2023). U.S. Patent 11,344,552.
[2] Wipo. Patent Landscape Reports, Therapeutic Areas. (2022).
[3] European Patent Office. Patent Family Reports. (2023).
[4] Johnson, M. (2022). Patent Strategies in Pharmaceutical Innovation. Journal of Patent Law.

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Drugs Protected by US Patent 11,344,552

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Ipsen ONIVYDE irinotecan hydrochloride INJECTABLE, LIPOSOMAL;INTRAVENOUS 207793-001 Oct 22, 2015 RX Yes Yes ⤷  Start Trial ⤷  Start Trial TREATMENT OF METASTATIC PANCREATIC ADENOCARCINOMA IN COMBINATION WITH OXALIPLATIN, FLUOROURACIL, AND LEUCOVORIN ⤷  Start Trial
>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 11,344,552

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2016310476 ⤷  Start Trial
Brazil 112018002941 ⤷  Start Trial
Canada 2993451 ⤷  Start Trial
China 108495629 ⤷  Start Trial
European Patent Office 3337478 ⤷  Start Trial
European Patent Office 3791876 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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