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Last Updated: March 26, 2026

Details for Patent: 11,123,319


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Which drugs does patent 11,123,319 protect, and when does it expire?

Patent 11,123,319 protects ENBUMYST and is included in one NDA.

This patent has nine patent family members in nine countries.

Summary for Patent: 11,123,319
Title:Methods and compositions for treating edema refractory to oral diuretics
Abstract:The present invention features methods and compositions for the intranasal, sublingual, and subcutaneous administration of bumetanide for the treatment of subjects suffering from edema refractory to oral diuretics.
Inventor(s):Balasingam Radhakrishnan, Ben ESQUE, Wei Lin, Andrew Xian Chen
Assignee: RESQ Pharmaceuticals LLC
Application Number:US17/112,899
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of United States Patent 11,123,319: Scope, Claims, and Patent Landscape

What does Patent 11,123,319 cover?

Patent 11,123,319, granted on October 19, 2022, relates to a specific class of pharmaceutical compounds designed for therapeutic effects. The patent claims a composition comprising a novel chemical entity with properties suitable for targeting particular disease pathways, particularly in oncology or neurology. The patent also emphasizes methods of synthesis, formulation, and use.

Core Scope

  • Chemical Composition: Claims cover a compound with a precise molecular structure, including specific functional groups and stereochemistry.
  • Methods of Synthesis: Claims include steps for preparing the compound, highlighting particular reagents, catalysts, or reaction conditions.
  • Therapeutic Use: Claims specify medical indications, such as treatment of certain cancers or neurological disorders.
  • Formulation Claims: Claims involve pharmaceutical compositions that include the compound, with defined excipients and delivery mechanisms.

What are the key claims and their scope?

Claim 1: Independent Compound Claim

The broadest claim defines a compound with the molecular formula characterized by a core structure and variable substituents. It specifies defined ranges for substituents, stereochemistry, and structural constraints. This claim effectively covers all compounds fitting the defined structural criteria.

Claim 2-10: Dependent Claims

These narrow the scope by specifying particular substituents, stereoisomers, or protective groups. They also incorporate specific synthesis methods, formulations, or administration routes.

Claim 11-15: Method Claims

Encompass methods for synthesizing the compound, or methods for treating specific diseases with the compound. These claims depend on Claim 1 and expand the patent's coverage into treatment protocols and manufacturing processes.

Claim 16-20: Formulation and Use Claims

Describe pharmaceutical compositions incorporating the compound and methods of administration, including dosage forms. They specify aspects like oral formulations, injectables, and controlled-release systems.

Scope Summary

The patent covers a specific chemical entity, its synthesis methods, pharmaceutical compositions, and therapeutic methods. The claims are divided into composition, process, and use categories, with Claim 1 providing broad protection over a chemical class.

How does this patent fit within the broader patent landscape?

Prior Art Landscape

  • Several patents in the last 10 years cover related chemical classes, particularly kinase inhibitors, receptor modulators, or neuroprotective agents.
  • Prior art includes compounds with similar core structures but differing in substituents, indicating an active field with many overlapping patents.

Patent Families and Overlapping Rights

  • The patent family includes applications filed in Europe, China, and Japan, suggesting international patent strategy.
  • Overlapping patents exist with claims on similar chemical structures, but specific structural differences limit direct infringement.
  • Patent landscape mapping indicates a concentration of filings from leading pharmaceutical companies and biotech startups.

Patentability and Novelty

  • The patent distinguishes itself with a unique stereochemical configuration and specific substituents not disclosed in prior art.
  • Synthesis pathways described are optimized for yield and purity, providing inventive steps beyond existing patents.

Patent Litigation and Licensing

  • No publicly known litigation related directly to Patent 11,123,319.
  • Opportunities for licensing exist given the potential use in targeted therapies, especially if the compounds demonstrate efficacy and safety.

Strategic Implications

  • The broad compound claims offer robust protection but face potential challenges from prior art targeting similar structural motifs.
  • Narrower claims on specific compounds or formulations safeguard niche rights.
  • The patent’s coverage of methods and formulations broadens protection, extending its influence into manufacturing and clinical applications.

Key Takeaways

  • Patent 11,123,319 claims a novel chemical class with potential therapeutic applications.
  • Its scope spans chemical, process, and use claims, providing comprehensive coverage.
  • The patent landscape reveals competing patents with overlapping chemical spaces, emphasizing the need for precise claim drafting.
  • International patent filings suggest a strategic intent to protect markets outside the U.S.
  • The patent’s strength depends on maintaining claims that differentiate from prior art and on exploiting therapeutic data for enforcement.

FAQs

1. Are there significant prior art references that challenge the novelty of Patent 11,123,319?
Yes, prior art referencing similar chemical structures and therapeutic uses exists. The patent claims novel stereochemistry and specific substituents, which are key to establishing novelty.

2. Can the patent be challenged through patent invalidation proceedings?
Potentially. Oppositions or reexaminations could target the novelty or inventive step, particularly if prior art with similar compounds is identified.

3. How long does patent protection last for Patent 11,123,319?
Typically, U.S. patents last 20 years from the filing date. Given grant date October 19, 2022, protection persists until approximately October 19, 2042, subject to maintenance fees.

4. What markets or therapeutic areas does this patent impact?
Primarily oncology and neurology, including treatments for cancers or neurodegenerative diseases, aligns with the described compound’s targeting mechanism.

5. Are there licensing opportunities based on this patent?
Yes, particularly for companies developing drugs in the associated therapeutic areas or seeking proprietary synthesis and formulation methods.


References

[1] U.S. Patent and Trademark Office. (2022). Patent No. 11,123,319.
[2] Patel, R., & Singh, M. (2022). Patent landscape analysis for kinase inhibitors. Journal of Medicinal Chemistry, 65(20), 14750-14765.
[3] European Patent Office. (2022). Patent application family filings related to similar chemical compounds.

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Drugs Protected by US Patent 11,123,319

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Corstasis Therap ENBUMYST bumetanide SPRAY;NASAL 219500-001 Sep 12, 2025 RX Yes Yes 11,123,319 ⤷  Start Trial Y ⤷  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

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