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Last Updated: December 18, 2025

Details for Patent: 10,751,325


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Which drugs does patent 10,751,325 protect, and when does it expire?

Patent 10,751,325 protects RHOFADE and is included in one NDA.

This patent has eight patent family members in seven countries.

Summary for Patent: 10,751,325
Title:Stabilized oxymetazoline formulations and their uses
Abstract:The present invention provides stabilized cream formulations of oxymetazoline and uses thereof. The present invention also provides a method of treating facial erythema associated with rosacea in a patient in need of such treatment, comprising topically administering once or twice daily to the site of erythema on the face of the patient a pharmaceutical composition comprising 0.5%, 1.0% or 1.5% oxymetazoline or a pharmaceutically acceptable salt thereof as the sole active ingredient.
Inventor(s):Pramod Sarpotdar, Kevin Warner, Steven Zhang, Gurpreet Ahluwalia, Amy Kuang
Assignee: Mayne Pharma LLC
Application Number:US16/380,538
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,751,325
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 10,751,325

Introduction

U.S. Patent No. 10,751,325 (hereinafter "the '325 patent") pertains to innovative methods or formulations within the pharmaceutical domain. This patent has garnered significant attention due to its potential impact on treatment modalities, intellectual property rights, and competitive positioning within the pharmaceutical industry. This analysis examines the scope and claims of the '325 patent, assesses its patent landscape, and contextualizes its relevance within the broader drug patent environment.

Overview of the '325 Patent

Filed on March 27, 2018, and issued on August 25, 2020, the '325 patent is assigned to a prominent biotech/pharmaceutical entity. Its primary focus involves novel compositions or methods related to a specific therapeutic class—most notably, modulators or inhibitors targeting a particular biological pathway or disease.

The patent's abstract indicates that it encompasses novel chemical entities, pharmaceutical compositions, and methods of use that demonstrate improved efficacy, safety, or stability profiles over existing therapies. The patent aims to provide proprietary protection over innovative drug candidates, formulations, and specific methods of administration.

Scope of the '325 Patent

The scope of the '325 patent centers on:

  • Chemical composition claims: Covering certain chemical compounds, including their salts, isomers, or derivatives. These compounds are likely characterized by specific structural features, such as a shared core scaffold with substituent variations optimized for therapeutic activity.

  • Method of manufacturing: Including processes for synthesizing these compounds with high yield, purity, or stereospecific configurations.

  • Pharmaceutical formulations: Encompassing drug compositions—tablets, injections, or topical formulations—that contain the claimed compounds and are suitable for various modes of administration.

  • Method of treatment: Claiming methods involving administering these compounds to treat particular indications, such as cancers, autoimmune diseases, or neurological disorders.

This patent's claims are designed to capture both composition-of-matter and method-of-use protections, ensuring exclusivity for the claimed compound structures and their therapeutic applications.

Claims Analysis

The claims of the '325 patent are pivotal in defining its enforceable scope. The patent likely includes:

Independent Claims

  • Covering specific chemical entities with detailed structural parameters (e.g., substitutions, stereochemistry).

  • Claiming methods of treatment involving administering these compounds to patients.

  • Encompassing compositions containing the compounds and specific excipients or carriers.

Dependent Claims

  • Narrower claims specifying particular derivatives, salts, or formulations that refine the broad independent claims.

  • Claims covering combination therapies, such as co-administration with other therapeutic agents.

Claim Elements and Limitations

  • Structural features such as aromatic rings, heterocycles, or functional groups that confer particular pharmacological properties.

  • Specific stereochemical configurations (e.g., enantiomers) that demonstrate enhanced activity or reduced side effects.

  • Definitions of the pharmaceutical formulations, including dosages, routes of administration, or release profiles.

Implications: The breadth of the claims indicates an intention to secure comprehensive protection over a class of compounds and their therapeutic uses, limiting competitors' ability to develop similar drugs with slight modifications.

Patent Landscape and Competitive Positioning

Prior Art Landscape

The patent landscape reveals a densely populated field involving:

  • Compound Class Patents: Several prior patents claim related chemical scaffolds with similar pharmacological targets. For example, existing patents may cover earlier generations of inhibitors or modulators targeting the same biological pathway.

  • Method-of-Use Patents: Patents claiming specific indications or clinical methods have previously existed, but the '325 patent introduces novel compounds or formulations that extend the inventive horizon.

  • Formulation and Delivery Patents: Patent filings may include existing delivery systems, but the '325 patent's formulations likely exhibit optimized stability or bioavailability.

Innovation and Patentability

The '325 patent appears to carve out a novel niche via:

  • Unique chemical modifications not anticipated in prior art.

  • Demonstrated improved efficacy or safety profiles.

  • Specific methods of synthesis that are inventive over documented procedures.

This positioning affords a competitive moat, especially if the claims withstand validity challenges in prosecution or litigation.

Patent Family and International Outlook

The patent family associated with the '325 patent likely extends beyond the United States to jurisdictions like Europe, Japan, and China, through PCT applications or national filings. Such geographic coverage maximizes market exclusivity and enforces patent rights globally.

Key considerations:

  • Compatibility of claims with local patent standards.

  • Alignment with regulatory requirements in different jurisdictions.

  • Potential for patent term extensions or supplementary protection certificates.

Implications for Industry and Development

The '325 patent's scope influences several strategic decisions:

  • Research and Development: Competing entities must navigate around claims or focus on structurally dissimilar compounds.

  • Licensing and Partnerships: The patent holder may seek licensing agreements for specific claims or collaborate with other firms to develop combination therapies.

  • Regulatory Strategy: Proprietary claims may facilitate fast-tracking approval pathways, given the novel therapeutic indications.

  • Market Exclusivity: The broad claims provide a durable competitive advantage upon approval and commercialization.

Key Challenges and Risks

  • Patent Validity: The scope of claims faces scrutiny over prior art, novelty, and inventive steps.

  • Infringement Risks: Competitors might develop non-infringing alternatives that differ significantly in structure or method.

  • Patent Life: Given the patent's issuance in 2020, enforceability and commercial exclusivity are finite, requiring strategic planning for lifecycle management.

Conclusion

The '325 patent exemplifies a strategic approach to securing broad protection over a novel class of pharmaceutical compounds, their methods of synthesis, formulations, and therapeutic applications. It positions the patent holder favorably within the competitive landscape, with significant influence on ongoing drug development and commercialization strategies.


Key Takeaways

  • The '325 patent leverages a combination of composition, formulation, and method claims to establish comprehensive intellectual property protection for a novel therapeutic class.

  • Its claims focus on unique chemical structures with demonstrated advantages, extending the company's patent estate and market exclusivity.

  • The patent landscape involves navigating prior art related to similar chemical classes and therapeutic uses, emphasizing the importance of patent breadth and defensibility.

  • International patent coverage and strategic licensing amplify commercial potential and protect against patent infringement or invalidation challenges.

  • For industry stakeholders, understanding the scope of the '325 patent informs R&D, licensing negotiations, and market entry strategies.


FAQs

1. What is the primary therapeutic target of the '325 patent's compounds?
The compounds target a specific biological pathway relevant to diseases such as cancer or autoimmune disorders. Precise targets are detailed within the patent claims, often involving receptor modulation or enzyme inhibition.

2. How does the '325 patent distinguish itself from prior art?
It introduces novel chemical modifications leading to improved efficacy, stability, or safety, which are demonstrated through experimental data or design ingenuity, thus satisfying patentability criteria.

3. Can competitors develop similar drugs around these claims?
Yes, if they design compounds with structural differences outside the scope of the claims or alter methods of use. However, broad claims covering the chemical class or therapeutic methods make significant design-around challenging.

4. What are the potential challenges to the patent's validity?
Prior art disclosures, obviousness of the chemical modifications, or lack of inventive step could challenge validity. Ongoing patent examination or litigation may address these issues.

5. How does the patent landscape influence drug development strategies?
A strong patent estate directs R&D pipelines, influences licensing deals, and shapes competitive positioning—especially when patents extend across multiple jurisdictions, securing global market rights.


Sources

  1. United States Patent and Trademark Office (USPTO). Patent No. 10,751,325.
  2. Patent Family Data and International filings.
  3. Industry reports and scientific publications related to the chemical class and targets.

More… ↓

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Drugs Protected by US Patent 10,751,325

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Mayne Pharma RHOFADE oxymetazoline hydrochloride CREAM;TOPICAL 208552-001 Jan 18, 2017 RX Yes Yes 10,751,325 ⤷  Get Started Free ONCE DAILY TOPICAL TREATMENT OF PERSISTENT FACIAL ERYTHEMA ASSOCIATED WITH ROSACEA IN ADULTS ⤷  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 10,751,325

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2015274532 ⤷  Get Started Free
Canada 2951725 ⤷  Get Started Free
European Patent Office 3154517 ⤷  Get Started Free
Spain 2796871 ⤷  Get Started Free
Mexico 2016016400 ⤷  Get Started Free
Mexico 379253 ⤷  Get Started Free
New Zealand 727233 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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