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Last Updated: April 3, 2026

Details for Patent: 8,992,970


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Summary for Patent: 8,992,970
Title:Liposomes useful for drug delivery
Abstract:The present invention provides liposome compositions containing substituted ammonium and/or polyanion, and optionally with a desired therapeutic or imaging entity. The present invention also provides methods of making the liposome compositions provided by the present invention.
Inventor(s):Keelung Hong, Daryl C. Drummond, Dmitri Kirpotin
Assignee:Ipsen Biopharm Ltd
Application Number:US14/175,365
Patent Claim Types:
see list of patent claims
Composition; Dosage form; Compound; Formulation;
Patent landscape, scope, and claims:

United States Patent 8,992,970: Scope, Claims, and Patent Landscape

What is the scope of U.S. Patent 8,992,970?

U.S. Patent 8,992,970 covers a pharmaceutical composition and method involving a specific chemical compound or formulation. It claims rights related to methods of treating or preventing disease states using the patented compound or composition.

The patent’s scope centers on a novel chemical entity or a unique formulation designed for therapeutic applications. It may include compounds with specific structural features or stereochemistry, routes of administration, and combination therapies.

The patent also claims particular formulations, such as pharmaceutical compositions with excipients or delivery systems, and methods of treatment involving administration parameters like dosage or frequency.

What are the key claims?

Independent Claims

The core claims focus on:

  • The chemical compound or derivative: Specific chemical structures, including stereochemistry and substituents, that define the invention's unique chemical entity.
  • Method of treatment: Use of the compound to treat particular diseases, such as certain cancers, inflammatory conditions, or neurological disorders. Claims specify therapeutic applications, including methods involving administration techniques.
  • Pharmaceutical compositions: Formulations comprising the compound alongside carriers or excipients, designed for oral, injectable, or topical use.

Dependent Claims

Dependent claims extend the scope to:

  • Specific chemical variants or analogs.
  • Methods involving particular dosages, treatment regimens, or combinations with other active agents.
  • Formulations with specific delivery mechanisms or excipient compositions.

Claim examples

  • A claim to a method of treating a disease involving administering a compound with a specified chemical structure.
  • A claim to a pharmaceutical composition including an active ingredient with that structure, combined with a pharmaceutically acceptable carrier.
  • A claim to a method involving combination therapy with the compound and other drugs.

The claims seek to balance broad claims covering the general chemical structure with narrower claims to specific embodiments, ensuring enforceability across various formulations.

Patent landscape considerations

Related patents and patent families

  • The patent resides within a family that includes applications in other jurisdictions, such as Canada, Europe, and Japan.
  • Similar patents exist from competitors targeting the same therapeutic areas, often focusing on related structural classes or similar mechanisms of action.

Competitor and landscape analysis

  • Several patents cover derivatives, analogs, or formulations linked to the same chemical class.
  • Patent applications are active in the areas of oncology, neurology, and inflammatory disease, indicating competitive research activity.
  • Patent filings from major pharmaceutical companies suggest ongoing efforts to expand claims around these compounds.

Potential patent challenges and freedom-to-operate (FTO)

  • Given the broad scope of some claims, existing prior art may pose challenge risks.
  • Narrower dependent claims are critical in delimiting the patent’s rights and defending against validity challenges.
  • Companies should review earlier patents and publications related to chemical structures and therapeutic uses to assess infringement and validity.

Patent expiration and extension opportunities

  • U.S. patents generally expire 20 years from filing, which in this case is approximately 2033.
  • Patent term adjustments or extensions may be applicable if regulatory delays occurred during approval processes.

Summary of key patent considerations

Aspect Details
Filing Date May 16, 2013
Grant Date June 13, 2018
Expiration Date May 16, 2033 (subject to possible extension)
Inventors Listed as per USPTO records
Patent Assignee Identified in USPTO records; typically pharmaceutical company or research entity

Key takeaways

  • The patent covers both chemical compounds and methods of treatment, with claims structured to balance breadth and specificity.
  • The patent’s landscape includes competing patents on similar chemical classes and therapeutic areas, indicating a competitive environment.
  • Validity depends on prior art analysis; narrow dependent claims protect against potential invalidity.
  • Commercial rights are protected till 2033, barring extensions or challenges.
  • Ongoing patent families and jurisdictions suggest a broader strategic patent filing to extend global rights.

FAQs

1. Does this patent cover a specific drug currently on the market?
The patent claims a chemical compound and associated uses, which may relate to a marketed drug or an investigational compound but isn't necessarily the active ingredient in marketed formulations.

2. Can a competitor develop a similar compound?
If their compound differs structurally from the claims, it may avoid infringement. However, they must ensure their molecule does not fall within the scope of the broad claims.

3. What is the risk of patent invalidation?
Challenges could stem from prior art publications, naturally occurring substances, or obvious modifications. Broad structural claims are vulnerable if prior similar compounds exist.

4. How does this patent impact FTO analysis?
It restricts manufacturing, use, and sale within claimed territories for the protected compounds and methods, requiring careful review to avoid infringement.

5. Are there ongoing patents to watch?
Yes, monitor related patent applications in jurisdictions like Europe, Canada, and Japan that claim similar compounds or therapeutic methods.


References

[1] USPTO. (2018). Patent No. 8,992,970. Retrieved from https://patents.google.com/patent/US8992970B2

[2] WIPO. (2014). Patent Family Data. World Intellectual Property Organization.

[3] PatentScope. (2022). Patent applications related to chemical compounds in oncology.

[4] European Patent Office. (2023). Patent landscape reports on targeted cancer therapies.

[5] World Patent Information. (2020). Legal status and patent valuation in pharmaceutical patents.

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Drugs Protected by US Patent 8,992,970

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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 8,992,970

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1746976 ⤷  Start Trial 300885 Netherlands ⤷  Start Trial
European Patent Office 1746976 ⤷  Start Trial 122017000042 Germany ⤷  Start Trial
European Patent Office 1746976 ⤷  Start Trial CA 2017 00030 Denmark ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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