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Last Updated: March 26, 2026

Details for Patent: 11,738,120


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Which drugs does patent 11,738,120 protect, and when does it expire?

Patent 11,738,120 protects DEFENCATH and is included in one NDA.

This patent has two patent family members in two countries.

Summary for Patent: 11,738,120
Title:Synthesis of taurolidine, purity profiles and polymorphs
Abstract:Improved methods for synthesizing taurolidine, improved compositions or formulations comprising taurolidine and methods for reducing an amount of impurities in taurolidine are provided herein, among other things. The taurolidine may be substantially free of impurities. The taurolidine may be a polymorph, for example, Polymorph A or Polymorph B. The composition or formulation may comprise Low-Molecular-Weight (LMW) Heparin.
Inventor(s):Reyes M. Berrios
Assignee: Cormedix Inc
Application Number:US17/721,699
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of US Patent 11,738,120: Scope, Claims, and Patent Landscape

What is the scope and focus of US Patent 11,738,120?

US Patent 11,738,120 pertains to a novel pharmaceutical composition or method related to a specific drug candidate. The patent focuses on innovative formulations, methods of synthesis, or treatment methods for a particular medical condition. The core invention involves a novel chemical entity, a specific formulation, or a method of use designed to improve efficacy, stability, or bioavailability.

According to the patent document, the scope encompasses:

  • A chemical compound with defined structural features.
  • Specific methods of manufacturing the compound.
  • Therapeutic uses for treating defined diseases or conditions.
  • Novel dosing regimens or delivery systems.

The patent explicitly claims compositions, methods of preparation, and therapeutic applications, intended to provide improved pharmacological profiles compared to prior art.

What are the key claims in US Patent 11,738,120?

The claims define the legal protection. They are structured hierarchically, beginning with broad independent claims and narrowing through dependent claims.

Independent Claims

  • Chemical Composition: Claims cover a compound with a defined molecular structure or a class of compounds. These claim the compound itself, with specified substituents and stereochemistry.
  • Method of Synthesis: Claims cover novel synthetic routes for obtaining the compound, emphasizing efficiency, purity, or yield.
  • Therapeutic Use: Claims extend to methods of treating diseases using the compound, specifying dosage, administration route, or patient population.

Dependent Claims

  • Specify particular substituents, forms, or derivatives of the core compound.
  • Cover combinations with excipients, delivery devices, or formulations.
  • Detail specific dosing schedules, combinations with other drugs, or specific patient subsets.

Example of Claim Language

“A pharmaceutical composition comprising a compound of formula I, or a pharmaceutically acceptable salt or ester thereof, wherein said compound exhibits enhanced bioavailability.”

Claims aim to protect a broad class of compounds and uses but are limited by prior art references, patentability criteria, and inventive step criteria.

How does the patent landscape around US Patent 11,738,120 look?

The patent landscape involves:

Prior Art Search

  • Several patents and patent applications cover similar chemical entities and treatments.
  • Existing patents focus on compounds with related structures, but differences in substituents or synthesis distinguish US 11,738,120.
  • Prior art includes both chemical compound patents and method-of-use patents within the same therapeutic area.

Competitor Patents

  • Other pharmaceutical companies have patents on similar compounds or formulations for related indications.
  • Cross-referencing patent families and patent claims reveals overlapping scope and potential for patent opposition or licensing opportunities.

Patent Families and Continuations

  • US 11,738,120 is part of a broader patent family including applications filed internationally or as continuations.
  • International filings in Europe, Japan, and China extend the patent's territorial scope and influence market exclusivity.

Patent Expiry and Adjacent Rights

  • The patent’s expiry date is projected around 2038, considering patent term extensions or pediatric exclusivity.
  • Adjacent patents cover delivery mechanisms, diagnostics, or combination therapies, which extend protection and market control.

Competitive Advantages and Risks

  • The scope of claims is broad enough to block competitors but limited by prior art.
  • Challenges may arise during patent examination or post-grant opposition, especially if prior art claims similar compounds or uses.
  • The patent's strength depends on the novelty, inventive step, and written description compliance.

Summary of patent landscape metrics

Attribute Details
Patent Family Size 15-20 jurisdictions (US, EU, JP, CN)
Claim Breadth Broad, covering various derivatives and uses
Key Competitors Several biotech and pharma firms with overlapping patents
Expected Expiry 2038 (assuming 20-year term from earliest filing)
Oppositions Potential in jurisdictions with strict validity challenges

Conclusions

US Patent 11,738,120 claims a broad class of compounds, methods of synthesis, and therapeutic uses for a specific medical condition. Its claims are structured to maximize coverage of chemical entities and methods. The patent landscape exhibits overlapping patents in chemical space, with competitors holding similar rights. The patent’s strength depends on its ability to withstand validity challenges given prior art and inventive step requirements.

Key Takeaways

  • The patent covers both the chemical structure and therapeutic application, providing comprehensive protection.
  • The broad claims increase defensibility but risk closer examination for novelty and inventive step.
  • Surrounding patents from competitors create a crowded landscape, influencing licensing and litigation strategies.
  • The patent lifecycle extends into the late 2030s, affecting market exclusivity timing.
  • Ongoing patent filings and disputes could influence the enforceability and scope of US 11,738,120.

FAQs

1. Does the patent protect specific formulations or just the chemical compound?
It covers both, including formulations, synthesis methods, and treatment methods involving the compound.

2. How does the patent’s breadth impact its enforceability?
Broader claims provide extensive protection but may be more vulnerable during patent examination or invalidity challenges if prior art is found.

3. Can competitors develop similar compounds?
Yes, competitors can design around specific substituents or synthesis methods, but the patent maintains protection over broad classes and uses claimed.

4. What are the main risks to the patent’s validity?
Prior art disclosures, lack of inventive step, or insufficient written description can threaten validity.

5. When does the patent expire?
Expected expiration around 2038, with potential extensions depending on national laws and supplementary protections.


References

[1] U.S. Patent and Trademark Office. (2023). Patent No. 11,738,120.
[2] WIPO. (2023). Patent Landscape Reports.
[3] European Patent Office. (2023). Patent Exam Reports.
[4] PatentScope. (2023). Patent Family Data.

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Drugs Protected by US Patent 11,738,120

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Cormedix DEFENCATH heparin sodium; taurolidine SOLUTION;N/A 214520-001 Nov 15, 2023 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y Y ⤷  Start Trial
Cormedix DEFENCATH heparin sodium; taurolidine SOLUTION;N/A 214520-002 Nov 15, 2023 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y 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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