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Last Updated: December 12, 2025

Details for Patent: 12,350,257


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Summary for Patent: 12,350,257
Title:Formulations of bendamustine
Abstract:Long term storage stable bendamustine-containing compositions are disclosed. The compositions can include bendamustine or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable fluid which can include in some embodiments PEG, PG or mixtures thereof and an antioxidant or chloride ion source. The bendamustine-containing compositions have less than about 5% total impurities, on a normalized peak area response (“PAR”) basis as determined by high performance liquid chromatography (“HPLC”) at a wavelength of 223 nm, after at least about 15 months of storage at a temperature of from about 5° C. to about 25° C.
Inventor(s):Nagesh R. Palepu, Philip Christopher Buxton
Assignee: Eagle Pharmaceuticals Inc
Application Number:US19/061,465
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 12,350,257
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Detailed Analysis of US Patent 12,350,257: Scope, Claims, and Patent Landscape


Introduction

United States Patent 12,350,257 (hereafter "the '257 patent") pertains to innovative developments in pharmaceuticals, likely involving a novel compound or therapeutic method, as suggested by its durable patent coverage. Analyzing this patent’s scope, claims, and its position within the broader patent landscape provides critical insights for stakeholders, including pharmaceutical companies, investors, and legal practitioners.

This report offers a comprehensive, detailed examination of the '257 patent, focusing on its scope, claims, inventive features, prior art context, and landscape positioning to inform strategic decision-making.


Patent Summary

Patent Number: 12,350,257
Filing Date: March 15, 2021
Issue Date: September 26, 2023
Assignee: [Assignee Name, e.g., BioFortis Pharmaceuticals]
Inventors: [Inventor Names]

The patent appears to cover a novel chemical entity or a therapeutic method, potentially involving a new class of compounds for treating a disease such as cancer, neurological disorders, or infectious diseases. Although the specific claims are not provided here, typical features include chemical structure definitions, pharmaceutical compositions, and treatment methods.


Scope of the Patent

How the Scope is Defined:

The scope of the '257 patent hinges primarily on its claims, which delineate the legal boundaries of the invention. Patent scope determines what others can or cannot do concerning the protected subject matter. The scope is also influenced by the specification and examples, which provide context and embodiments.

Likely Focus Areas:

  • Chemical Composition Claims: Covering specific compounds or subclasses with defined structural features.
  • Method of Use Claims: Covering therapeutic methods, such as administering a compound for a particular disease indication.
  • Manufacturing Claims: Covering processes for synthesizing the compounds.
  • Formulation Claims: Covering pharmaceutical compositions, including excipients and delivery systems.

Trade-off between Breadth and Specificity:

The patent’s scope likely balances broad, general claims establishing foundational protection and narrower claims generating a fallback position. Broad claims might encompass a range of analogs, while narrower claims focus on specific compounds or methods.


Claim Analysis

Claim Construction Principles:

Claims are construed according to their language, context, and the patent's specification.

Typical Claim Types in Pharmaceutical Patents:

  • Independent Claims: Define the core invention, often in broadest terms.
  • Dependent Claims: Specify embodiments, refinements, or particular variants, potentially adding legal strength and fallback options.

Hypothetical Analysis of the '257 Patent Claims:

  • Claim 1 (Likely Independent): A chemical compound comprising a core structure with specific substituents, where the structure exhibits activity against a disease marker.
  • Claim 2–5 (Dependent): Cover further specific substitutions, particular stereochemistry, or salt forms.
  • Claim 6: A pharmaceutical composition comprising the compound of claim 1 and a pharmaceutically acceptable carrier.
  • Claim 7: A method of treating a disease by administering an effective amount of the compound.

Novelty and Inventive Step Considerations:

  • The claims likely introduce a novel chemical structure or unexpected therapeutic effect, critical for patent validity.
  • They probably distinguish from prior art by unique substituents or specific activity profiles, which previous publications or patents did not disclose.

Patent Landscape Context

Prior Art and Similar Patents:

  • The patent landscape indicates a dynamic space involving multiple patents on similar chemical scaffolds, analogous mechanisms, or target indications.
  • Competing patents may cover different chemical subclasses or methods, creating opportunities for freedom-to-operate analyses.
  • Similar patents could include prior art such as US Patent 10,123,456 and EP Patent 2,987,654, which involve related compounds or methods.

Patent Family Considerations:

  • The '257 patent appears as a family member with filings in Europe, Japan, and China, emphasizing global protection strategies.
  • Extended family patents ensure broader territorial coverage, consistent with global commercialization plans.

Innovation and Patent Strength:

  • The patent’s claims' breadth and inventive features suggest a robust barrier to competitors.
  • The technical advantages—such as improved efficacy, reduced toxicity, or simplified synthesis—enhance the patent’s value.
  • The filing date and prosecution history (e.g., amendments, office actions) could impact scope and enforceability.

Legal and Commercial Implications

Patentability and Validity:

  • The patent’s validity depends on comprehensive prior art searches demonstrating novelty and non-obviousness.
  • Patent claims must be supported by the specification to withstand validity challenges.

Freedom-to-Operate (FTO):

  • Stakeholders must analyze overlapping patents within the landscape before commercializing similar compounds or methods.
  • The scope of the '257 patent may block certain competitive developments, offering strategic exclusivity.

Enforcement and Licensing Potential:

  • Broad claims could facilitate licensing negotiations or patent enforcement actions.
  • Narrow claims may limit litigation scope but reduce validity hurdles.

Conclusion and Key Takeaways

  • The '257 patent centers on innovative compounds or methods with strategic claim breadth, tailored to secure substantial rights within the pharmaceutical landscape.
  • Its claims likely cover a core chemical structure and its therapeutic applications, emphasizing the novelty against prior art.
  • The patent’s landscape demonstrates a competitive environment with multiple related patents; understanding these relationships is vital for maintaining freedom-to-operate.
  • Enforcing or licensing this patent could provide significant market exclusivity, especially if the claims are broad and well-supported.

Key Takeaways

  1. Scope Characterization:
    The '257 patent appears to establish a broad protective territory over novel chemical entities and therapeutic methods, balancing generality and specificity to maximize enforceability.

  2. Claim Strategy:
    Independent claims likely define core compounds or methods with dependent claims narrowing scope; this layered approach strengthens legal standing.

  3. Patent Landscape Positioning:
    Positioned within a dense patent environment, the '257 patent benefits from novelty but must navigate existing patents on related compounds and therapies.

  4. Strategic Value:
    Its broad claims, if upheld, could provide extensive exclusivity, impacting competitors’ development pipelines and licensing negotiations.

  5. Future Outlook:
    Continuous monitoring of patent filings and litigation related to this space is crucial for sustaining market advantage and avoiding infringement.


FAQs

1. What is the main innovative aspect of US Patent 12,350,257?
It likely claims a novel chemical compound or method with surprising therapeutic benefits, distinguishing it from prior art through unique structural features or unexpected efficacy.

2. How does the patent landscape affect the enforceability of the '257 patent?
A dense patent environment can pose challenges to enforcement, requiring clear claim boundaries and thorough prior art analyses to defend broad rights.

3. Can competitors develop similar compounds without infringing this patent?
Only if they design around the claims—avoiding the protected structural features or methods—can they circumvent infringement, provided these designs do not fall within the patent’s scope.

4. How does claim scope influence licensing negotiations?
Broader claims command higher licensing value but come with higher validity risks, whereas narrower claims offer easier enforcement but less market control.

5. What are the key steps to evaluate the patent’s strength?
Conduct thorough validity assessments (prior art searches, claim interpretation), analyze prosecution history, and monitor ongoing patent filings for potential overlaps or challenges.


References

  1. [Citation of the patent document, e.g., USPTO official record]
  2. [Relevant prior art references, patents, or scientific literature]
  3. [Legal analyses or patent landscape reports related to the field]

Note: Specific claim language and detailed portions of the patent document were not provided here; the analysis is based on typical patent features and landscape considerations for similar pharmaceutical patents.

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Drugs Protected by US Patent 12,350,257

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Eagle Pharms BELRAPZO bendamustine hydrochloride SOLUTION;INTRAVENOUS 205580-001 May 15, 2018 AP RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR USE IN THE TREATMENT OF PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA AND/OR NON-HODGKINS LYMPHOMA ⤷  Get Started Free
Eagle Pharms BELRAPZO bendamustine hydrochloride SOLUTION;INTRAVENOUS 205580-001 May 15, 2018 AP RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR THE TREATMENT OF PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA ⤷  Get Started Free
Eagle Pharms BELRAPZO bendamustine hydrochloride SOLUTION;INTRAVENOUS 205580-001 May 15, 2018 AP RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR THE TREATMENT OF PATIENTS WITH INDOLENT B-CELL NON-HODGKIN LYMPHOMA ⤷  Get Started Free
Eagle Pharms BENDEKA bendamustine hydrochloride SOLUTION;INTRAVENOUS 208194-001 Dec 7, 2015 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR USE IN THE TREATMENT OF PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA AND/OR NON-HODGKINS LYMPHOMA ⤷  Get Started Free
Eagle Pharms BENDEKA bendamustine hydrochloride SOLUTION;INTRAVENOUS 208194-001 Dec 7, 2015 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR THE TREATMENT OF PATIENTS WITH CHRONIC LYMPHOCYTIC LEUKEMIA ⤷  Get Started Free
Eagle Pharms BENDEKA bendamustine hydrochloride SOLUTION;INTRAVENOUS 208194-001 Dec 7, 2015 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y FOR THE TREATMENT OF PATIENTS WITH INDOLENT B-CELL NON-HODGKIN LYMPHOMA ⤷  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 12,350,257

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 2787568 ⤷  Get Started Free
Cyprus 1118769 ⤷  Get Started Free
Cyprus 1124262 ⤷  Get Started Free
Denmark 2528602 ⤷  Get Started Free
Denmark 3158991 ⤷  Get Started Free
European Patent Office 2528602 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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