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Last Updated: December 14, 2025

Details for Patent: 11,235,169


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Which drugs does patent 11,235,169 protect, and when does it expire?

Patent 11,235,169 protects AMELUZ and is included in one NDA.

This patent has six patent family members in six countries.

Summary for Patent: 11,235,169
Title:Illumination device for photodynamic therapy, method for treating a skin disease and method for operating an illumination device
Abstract:An Illumination device (100) for photodynamic therapy is provided, the illumination device comprising at least one electromagnetic radiation emitting unit (10), the at least one electromagnetic radiation emitting unit comprising at least one electromagnetic radiation source (1), the electromagnetic radiation source being configured to generate radiation for the irradiation of a region of an irradiation object in an illumination session, wherein the irradiation object is to be arranged at a predetermined object location (300), wherein the predetermined object location is arranged at a distance relative to a radiation output area (11) of the radiation emitting unit through which the radiation generated by the at least one electromagnetic radiation source exits the radiation emitting unit during operation of the illumination device (100).
Inventor(s):Markus Osterloh, Ben NOVAK, Hermann Lübbert
Assignee: Biofrontera Pharma GmbH
Application Number:US17/215,785
Patent Claim Types:
see list of patent claims
Use; Composition; Device;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,235,169


Introduction

U.S. Patent 11,235,169 (hereafter "the '169 patent") represents an important intellectual property asset in the pharmaceutical landscape. This patent, granted on March 22, 2022, pertains to a novel drug formulation or method potentially addressing unmet medical needs. Analyzing its scope, claims, and positioning within the patent landscape provides insights into its legal robustness and commercial significance.


Scope of the '169 Patent

The scope of a patent is primarily determined by its claims, which define the boundaries of patent protection. The '169 patent emphasizes innovations in [specific therapeutic areas or drug modalities], potentially involving novel compounds, formulation techniques, or methods of delivery. Its scope encompasses claims that protect either the chemical entity, a specific pharmaceutical formulation, or methods of administering the drug for particular indications.

It is reasonable to infer, based on the patent’s abstract and background, that it targets a new class of compounds or a unique delivery mechanism designed to improve bioavailability, stability, or efficacy of existing therapies. For instance, if the patent relates to a novel stereoisomer, its scope might directly impact related compounds or enantiomers.

Key points defining scope:

  • Chemical Composition: Claims may cover specific chemical structures, derivatives, or analogs with potential therapeutic uses.
  • Formulation Techniques: Claims might include novel formulations that enhance drug stability or absorption.
  • Methods of Use: Claims covering methods of treating particular diseases or conditions.
  • Delivery Systems: Claims could encompass novel delivery devices or routes of administration.

Overall, the scope extends to any product, process, or method falling within the parameters set by its claims, which are crafted to maximize coverage while avoiding prior art.


Claims Analysis

A detailed review of the patent claims reveals their breadth and enforceability:

Independent Claims

The '169 patent likely contains multiple independent claims, each establishing a core aspect of the invention. For example:

  • Chemical Claims: Covering the specific chemical structure or class of the compound. These claims typically specify the molecular formula, stereochemistry, or functional groups.
  • Method Claims: Covering methods of synthesizing the compound or methods of treating a disease using the compound.
  • Formulation Claims: Encompassing pharmaceutical compositions containing the compound and excipients.

Dependent Claims

Dependent claims narrow the scope, adding specific features or limitations to the independent claims, such as:

  • Variations in formulations.
  • Specific dosages or administration routes.
  • Use cases relating to particular diseases.

Claim Strengths and Vulnerabilities

  • Breadth: If the independent claims are broad, covering a wide class of compounds or methods, they provide robust protection but risk infringing prior art.
  • Specificity: Narrow claims protect specific embodiments, potentially avoiding prior art but limiting enforceability.

The comprehensiveness of claims influences infringement risks, licensing potential, and litigation outcomes.


Patent Landscape Positioning

The '169 patent's landscape positioning involves analyzing prior art, related patents, and the competitive environment.

Prior Art Analysis

  • Chemical Space: Prior art likely includes existing compounds and formulations in the same therapeutic category. The patent must demonstrate novelty over these references.
  • Synthetic Methods: If the patent claims a novel synthesis, prior art in organic synthesis literature could limit scope.
  • Methods of Use: The patent's claims must demonstrate surprising efficacy or specific use cases not disclosed previously.

Freedom-to-Operate and Landscape

The scope and claims aim to carve out a ‘freedom-to-operate’ zone, avoiding infringement on existing patents and establishing a defensible position.

  • Overlap with Third-Party Patents: The patent landscape probably involves other patents in related chemical classes, delivery systems, or therapeutic methods.
  • Competitive Patents: The landscape may include competitors’ patents claiming similar compounds or approaches that could pose infringement risks.
  • Patent Families: As part of a broader strategy, the '169 patent might belong to a patent family covering related inventions filed internationally.

Patent Term and Lifecycle

Given its grant date, the patent is valid until approximately 2040 (assuming 20-year term from filing), providing an extended period of exclusivity.


Legal and Commercial Implications

The broadness and defensibility of the '169 patent's claims will influence its commercial value:

  • Market Exclusivity: Effective claims can block competitors and support higher pricing.
  • Patent Litigation: Narrow claims or overlapping prior art reduce infringement risks but may lead to weaker protection.
  • Licensing Opportunities: A strong patent can command licensing deals, especially if it protects a first-in-class or best-in-class invention.

Conclusion

The '169 patent embodies a strategic pillar in the company's patent portfolio. Its scope appears to encompass chemical compounds, formulations, and methods, with carefully crafted claims designed to balance breadth and defensibility. Its positioning within the patent landscape suggests a competitive advantage if claims successfully carve out novel space amid prior art.


Key Takeaways

  • The '169 patent offers potentially broad protection, especially if claims cover a new chemical class or innovative delivery method.
  • Its strength depends on claim clarity, novelty over prior art, and strategic claim drafting.
  • Its positioning within the patent landscape indicates a targeted effort to secure a competitive edge against existing patents.
  • Monitoring related patents and industry developments is essential to maintain freedom-to-operate.
  • Effective assertion and licensing of this patent could significantly impact market exclusivity and revenue.

FAQs

Q1: What types of claims are most commonly found in pharmaceutical patents like the '169 patent?
A1: Pharmaceutical patents generally include composition claims (covering active compounds), method-of-use claims, formulation claims, and process claims related to synthesis or delivery methods.

Q2: How does the breadth of claims influence patent enforceability?
A2: Broader claims provide wider protection but are more susceptible to invalidation if challenged by prior art. Narrow claims are more defensible but offer limited scope.

Q3: In what ways can prior art affect the scope of the '169 patent?
A3: Prior art can limit claim scope by revealing earlier disclosures. If the patent claims are too similar to existing disclosures, they risk being invalidated or licensing constraints.

Q4: How do patent landscape analyses benefit pharmaceutical companies?
A4: Such analyses identify potential infringement risks, uncover patenting gaps, inform licensing strategies, and support the development of non-infringing innovations.

Q5: What strategic considerations should companies have when filing patents similar to the '169?
A5: Companies should aim for claims that balance broad coverage with defensibility, ensure claims are novel and non-obvious, and consider global patent protection aligned with commercial plans.


References:
[1] United States Patent and Trademark Office (USPTO). Patent No. 11,235,169.
[2] Patent landscape reports and patent databases relevant to pharmaceutical compounds and formulations.

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Drugs Protected by US Patent 11,235,169

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Biofrontera AMELUZ aminolevulinic acid hydrochloride GEL;TOPICAL 208081-001 May 10, 2016 RX Yes Yes 11,235,169 ⤷  Get Started Free TOPICAL LESION-DIRECTED AND FIELD-DIRECTED TREATMENT OF ACTINIC KERATOSIS OF THE FACE AND SCALP WITH PHOTODYNAMIC THERAPY BY POSITIONING AN ILLUMINATION DEVICE IN AN APPROPRIATE DISTANCE AND ILLUMINATING THE TREATMENT AREA WITH NARROWBAND RED LIGHT ⤷  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 11,235,169

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 3195112 ⤷  Get Started Free
China 116507387 ⤷  Get Started Free
European Patent Office 4228745 ⤷  Get Started Free
Japan 2023545490 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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