Enhanced Fluorescence Compositions and Methods via Polymeric Spacers

Publication ID: 24-11857643_0001_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Fluorescence Compositions and Methods via Polymeric Spacers,” Published Technical Disclosure No. 24-11857643_0001_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857643_0001_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,643.

Summary of the Inventive Concept

This inventive concept relates to novel compositions and methods for enhancing fluorescence signals and reducing quenching in biomolecule labeling applications, leveraging polymeric spacers to improve detection sensitivity and accuracy.

Background and Problem Solved

The original patent disclosed methods for increasing fluorescent signals and reducing quenching using spacer molecules. However, these methods had limitations, including reduced quenching efficiency and restricted spacer molecule options. The new inventive concept addresses these limitations by introducing polymeric spacers, which provide improved quenching reduction and increased flexibility in biomolecule labeling.

Detailed Description of the Inventive Concept

The new inventive concept comprises methods and compositions for enhancing fluorescence signals in biomolecule labeling applications. Specifically, the concept involves conjugating a plurality of fluorescent labels to a biomolecule via a polymeric spacer. The polymeric spacer reduces quenching of the fluorescent labels, resulting in increased fluorescence emission. This approach enables improved detection sensitivity and accuracy in various applications, including immunofluorescence, cellular imaging, and quantitation assays.

Novelty and Inventive Step

The use of polymeric spacers to reduce quenching and enhance fluorescence signals in biomolecule labeling applications represents a significant improvement over the original patent. The new claims introduce a novel and non-obvious solution to the problem of quenching, providing a more efficient and flexible approach to biomolecule labeling.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept may include the use of different polymeric spacer materials, varying the length and structure of the polymeric spacer, or incorporating additional components to further enhance fluorescence signals. Variations of the concept may also involve adapting the approach for use in different biomolecule labeling applications or integrating the technology with other detection methods.

Potential Commercial Applications and Market

The enhanced fluorescence compositions and methods via polymeric spacers have significant commercial potential in the life sciences and biomedical industries. The technology may be applied in various areas, including immunofluorescence, cellular imaging, and quantitation assays, with potential customers including research institutions, pharmaceutical companies, and diagnostic laboratories.

CPC Classifications

SectionClassGroup
A A61 A61K49/0015
A A61 A61K47/10
A A61 A61K47/18
A A61 A61K49/0058
G G01 G01N33/533
G G01 G01N33/582
G G01 G01N33/68

Field of Art

Biomolecule labeling technologies, fluorescence imaging, and molecular detection techniques, with expertise in chemical conjugation methods, fluorescent label optimization, and quantitative biomolecular analysis

Person of Ordinary Skill (PHOSITA) Profile

A skilled researcher with advanced degrees in biochemistry, molecular biology, or bioengineering, possessing practical experience in fluorescence microscopy, protein modification techniques, and understanding of molecular spacer chemistry

Obviousness Rationale

A PHOSITA would recognize that the PTD's polymeric spacer approach represents a predictable variation of the source patent's spacer molecule strategy. The fundamental concept of reducing fluorescence quenching through strategic molecular spacing is consistent between the source patent and PTD. The modifications introduce alternative spacer materials and conjugation approaches that would be considered routine optimization within the field of biomolecule labeling technologies.

Obvious Combinations & Variations

Source Patent Element
Conjugating spacer molecules to reduce fluorescent label quenching
PTD Variation
Introducing polymeric spacers with variable length and structure to achieve similar quenching reduction
Obviousness Reasoning
A PHOSITA would recognize polymeric spacers as a known technique for molecular distancing, with predictable results in reducing fluorescence interference
Source Patent Element
Conjugating two to ten fluorescent labels to an antibody
PTD Variation
Extending label conjugation strategy to other biomolecules using polymeric spacer technology
Obviousness Reasoning
Applying established labeling techniques across different biomolecule types represents a standard design choice with expected outcomes
Source Patent Element
Using specific spacer molecules like sulfo-NHS-acetate and MS-(PEG)4
PTD Variation
Introducing broader classes of polymeric spacers with similar molecular distancing properties
Obviousness Reasoning
Exploring alternative spacer chemistries would be an obvious iterative improvement for a skilled practitioner seeking enhanced fluorescence performance
Source Patent Element
Method for increasing fluorescence of labeled antibodies
PTD Variation
Expanding methodology to quantitation systems and imaging applications using polymeric spacer conjugation
Obviousness Reasoning
Translating fluorescence enhancement techniques across different detection modalities represents a predictable technological progression
Source Patent Element
Conjugating 2 to 50 spacer molecules to an antibody
PTD Variation
Implementing variable spacer molecule density and configuration to optimize fluorescence signal
Obviousness Reasoning
Systematically exploring spacer molecule parameters constitutes routine experimental optimization within the field
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857643, the present publication demonstrates that the claimed variations in biomolecule labeling technologies involving polymeric spacer conjugation would have been obvious to a person having ordinary skill in the art at the time of the invention. The disclosed methods represent predictable extensions of known fluorescence enhancement strategies, utilizing routine molecular engineering techniques to achieve substantially similar results in reducing fluorescent quenching and improving detection sensitivity.

Original Patent Information

Patent NumberUS 11,857,643
TitleCompositions and methods for enhanced fluorescence
Assignee(s)Life Technologies Corporation, Pierce Biotechnology, Inc.