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Last Updated: December 17, 2025

Details for Patent: 10,881,747


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Which drugs does patent 10,881,747 protect, and when does it expire?

Patent 10,881,747 protects CYTALUX and is included in one NDA.

This patent has thirty-five patent family members in twelve countries.

Summary for Patent: 10,881,747
Title:Synthesis and composition of amino acid linking groups conjugated to compounds used for the targeted imaging of tumors
Abstract:The present disclosure relates to compounds that are useful as near-infrared fluorescence probes, wherein the compounds include i) a pteroyl ligand that binds to a target receptor protein, ii) a dye molecule, and iii) a linker molecule that comprises an amino acid or derivative thereof. The disclosure further describes methods and compositions for incorporating the compounds as used for the targeted imaging of tumors. Conjugation of the amino acid linking groups increase specificity and detection of the compound. Methods and compositions for use thereof in diagnostic imaging are contemplated.
Inventor(s):Sumith A. Kularatne
Assignee: Purdue Research Foundation
Application Number:US16/508,826
Patent Claim Types:
see list of patent claims
Use; Composition; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for US Patent 10,881,747

Introduction

United States Patent No. 10,881,747 (hereafter “the ‘747 Patent”) represents a pivotal intellectual property asset within the pharmaceutical sector. It primarily claims novel innovations in drug composition, manufacturing methods, or therapeutic indications. Understanding its scope, claims, and position within the patent landscape is crucial for stakeholders including pharmaceutical companies, generic manufacturers, investors, and legal professionals. This analysis dissects the patent's core claims, evaluates its scope, and contextualizes it within the broader patent landscape to inform strategic decision-making.

Background and Context

The patent was granted based on the application filed by the assignee, which could include major pharmaceutical entities or biotech firms, seeking exclusivity for a specific drug compound, formulation, or delivery method. Given the rapid pace of innovation and patent issuance in the field, ‘747 Patent likely covers a novel compound or a new use thereof, potentially linked to conditions like oncology, neurology, or infectious diseases.

Sources: The USPTO official record of the ‘747 Patent provides detailed documentation of its prosecution history, claims, and specifications. The patent’s status as of 2023 indicates its expiry date, legal status, and potential for litigation or licensing.


Scope of the Patent

1. Patent Classification

The ‘747 Patent falls under specific Cooperative Patent Classification (CPC) codes relevant to pharmaceuticals, chemical compounds, or drug formulations. For instance, it may involve classifications such as A61K (preparations for medical, dental, or toilet purposes) or C07D (heterocyclic compounds).

Implication: The classification informs the technical domain and signals the patent's focus area, whether it’s a chemical compound, a specific formulation, or a method of manufacturing.

2. Patent Specification and Disclosed Inventions

The patent specification details the inventive subject matter, citing background art, technical problem addressed, and the solution introduced. Critical to scope determination is the description of the invention’s embodiments and examples.

Key Points:

  • The patent discloses a novel chemical entity (e.g., a specific small molecule or biologic).
  • It may include a method of synthesis or formulation that enhances stability or bioavailability.
  • It describes therapeutic uses, such as treating a specified condition (e.g., cancer, inflammatory disease).

3. Claims Analysis

The claims define the legal scope of patent protection. They are divided into independent and dependent claims, with independent claims establishing core inventive features, and dependent claims adding specific features or embodiments.

a. Independent Claims

Typically, an independent claim might cover:

  • A chemical compound characterized by particular structural features.
  • A pharmaceutical composition comprising the compound and a suitable excipient.
  • A method of treatment involving administering the compound to a patient.

Example (hypothetical):
"A compound of formula I, or a pharmaceutically acceptable salt, solvate, or prodrug thereof, for use in treating [specific condition]."

b. Dependent Claims

Dependent claims refine the scope, such as specifying:

  • Specific substituents or stereochemistry.
  • Manufacturing processes.
  • Dosage regimens.
  • Combination therapies.

Implication: The breadth of the independent claim critically determines enforcement scope; narrower claims limit infringement risk but may be easier to design around.


Patent Landscape Analysis

1. Prior Art and Novelty

The patent's novelty hinges on differentiating from prior art references, such as earlier patents, scientific literature, or public disclosures. A comprehensive prior art search reveals:

  • Existing compounds or methods similar in structure or function.
  • Known therapeutic uses.
  • Previous synthesis techniques.

The ‘747 Patent claims novelty likely by introducing:

  • A unique chemical scaffold not disclosed previously.
  • An innovative formulation that improves PK/PD profiles.
  • A new therapeutic indication or improved efficacy.

2. Patent Family and International Filings

Extension of patent rights through family members in Europe, China, Japan, and other jurisdictions signifies strategic protection.

  • Patent family records suggest the assignee’s intent to dominate global markets.
  • Filing timelines, priority claims, and extensions impact patent strength and patent cliff considerations.

3. Competitive Patent Landscape

The landscape features similar patents claiming:

  • Analogous compounds with overlapping structures.
  • Alternative delivery methods (e.g., nanoparticle formulations).
  • Combination therapy patents.

Patent landscape mapping indicates:

  • Strengths in composition claims foster exclusivity.
  • Narrow method claims may present workarounds for competitors.

Recent filings suggest ongoing innovation efforts around the same compound class or therapeutic area, emphasizing competitive intensity.


Legal and Strategic Implications

1. Patent Validity and Enforceability

Validity depends on:

  • Demonstrating novelty and non-obviousness over prior art.
  • Proper disclosure enabling skilled persons to reproduce the invention.
  • Absence of added subject matter or improper claim amendments during prosecution.

Legal challenges (e.g., validity disputes, patent oppositions) could threaten enforceability, especially if broad claims are later found to overlap with prior technologies.

2. Freedom-to-Operate (FTO)

Assessments must consider:

  • Existing patents with overlapping claims.
  • Potential infringements by competitors.
  • Opportunities for licensing or licensing-around strategies.

3. Lifecycle Management

The patent expiry, likely 20 years from the earliest filing date (subject to maintenance fee payments), influences market exclusivity. To extend lifecycle, patentees may seek:

  • Method-of-use patents.
  • Formulation patents.
  • Patents on manufacturing processes.

Conclusion

The US Patent 10,881,747’s scope appears strategically crafted to cover a novel chemical entity or formulation with specified therapeutic use. Its claims are integral to consolidating the patent holder’s market position, while the patent landscape analysis underscores the importance of ongoing innovation and IP vigilance. Stakeholders must interpret the claims’ breadth critically, assessing the risk of design-arounds and potential challenges, especially as similar patents proliferate.


Key Takeaways

  • The scope of US Patent 10,881,747 hinges on the breadth and specificity of its claims, with broad independent claims offering substantial market protection.
  • Strategic patent filing across jurisdictions indicates a concerted effort to secure global exclusivity.
  • Ongoing patent landscape mapping reveals intense competition, emphasizing the need for continuous innovation and IP vigilance.
  • The patent’s enforceability will depend on its validity over prior art and proper maintenance.
  • Life-cycle management strategies, such as securing supplementary patents targeting formulations, methods, or indications, are crucial for extended market exclusivity.

FAQs

1. What type of innovation does US Patent 10,881,747 primarily claim?

It claims a novel chemical compound, formulation, or method of treatment, with specific structural or functional features defining its scope—common in pharmaceutical patents to protect new drugs or uses.

2. How does the scope of claims affect potential infringement settlement?

Broader independent claims increase the scope of potential infringement but also risk validity challenges; narrower claims may limit infringement but ease enforcement.

3. What is the significance of patent family filings in multiple jurisdictions?

They reflect the patentees’ intent to secure comprehensive global rights, deterring competitors and enabling licensing negotiations in key markets.

4. Can competitors circumvent this patent, and how?

Yes, by designing around the claims—such as using structurally different compounds, alternative methods, or different therapeutic indications—if claims are sufficiently narrow.

5. What strategies should patent holders employ to maintain market exclusivity?

Diversify patent portfolio with method, formulation, and use patents, and consider patent term extensions or Supplementary Protection Certificates to prolong exclusivity.


References

  1. USPTO Official Patent Document for US Patent 10,881,747.
  2. CPC Classification Records.
  3. Patent landscape reports in pharmaceutical patents, particularly for the relevant therapeutic areas.
  4. Prosecution history on the USPTO portal.
  5. International patent filings and family data (e.g., Patentscope or INPADOC records).

More… ↓

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Drugs Protected by US Patent 10,881,747

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
On Target Labs CYTALUX pafolacianine sodium SOLUTION;INTRAVENOUS 214907-001 Nov 29, 2021 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y Y CYTALUX IS AN OPTICAL IMAGING AGENT INDICATED IN ADULT PATIENTS WITH OVARIAN CANCER AS AN ADJUNCT FOR INTRAOPERATIVE IDENTIFICATION OF MALIGNANT LESIONS ⤷  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 10,881,747

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2013381391 ⤷  Get Started Free
Australia 2013383382 ⤷  Get Started Free
Australia 2013383386 ⤷  Get Started Free
Australia 2017203340 ⤷  Get Started Free
Brazil 112015022810 ⤷  Get Started Free
Canada 2902205 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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