Phospholipid-Based Ultrasound Contrast Agents for Niche Environments

Publication ID: 24-11857646_0009_PTD
Published: October 28, 2025
Category:Specialized Variations & Niche Solutions

Legal Citation

pr1or.art Inc., “Phospholipid-Based Ultrasound Contrast Agents for Niche Environments,” Published Technical Disclosure No. 24-11857646_0009_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857646_0009_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. 11,857,646.

Summary of the Inventive Concept

Improved methods and systems for preparing phospholipid-based ultrasound contrast agents adapted for specialized applications, such as high-security environments, disaster relief, extreme weather conditions, remote areas, and areas with limited access to clean water.

Background and Problem Solved

The original patent disclosed improved methods for preparing phospholipid-based ultrasound contrast agents, but these methods have limitations when applied to specific, narrow market or unique operational environments. The new inventive concept addresses these limitations by providing specialized variations and niche solutions for preparing phospholipid-based ultrasound contrast agents in challenging environments.

Detailed Description of the Inventive Concept

The new inventive concept comprises a system for preparing phospholipid-based ultrasound contrast agents in high-security environments, featuring a secure, tamper-evident container for storing divalent metal cations, and a phospholipid solution formulation that is resistant to precipitation induced by said cations. Additionally, the concept includes a method for preparing lipid-encapsulated gas microspheres in disaster relief situations, utilizing a portable, battery-powered mixing device and a phospholipid blend that is tolerant of varying temperatures and humidity levels. Furthermore, the concept encompasses a phospholipid-based ultrasound contrast agent formulation for use in extreme weather conditions, comprising a combination of DPPA, DPPC, and MPEG5000-DPPE, and a stabilizing agent that prevents precipitation of the phospholipids in the presence of divalent metal cations. The concept also includes a system for preparing phospholipid-based ultrasound contrast agents in remote or resource-limited areas, featuring a compact, self-contained manufacturing unit that includes a phospholipid solution formulation and a means for filtering out precipitated phospholipids. Finally, the concept includes a method for preparing lipid-encapsulated gas microspheres in areas with limited access to clean water, utilizing a phospholipid blend that is resistant to contamination by heavy metals and other impurities.

Novelty and Inventive Step

The new inventive concept is novel and non-obvious compared to the original patent, as it provides specialized variations and niche solutions for preparing phospholipid-based ultrasound contrast agents in challenging environments, which were not addressed in the original patent. The inventive step lies in the adaptation of the original methods to specific, narrow market or unique operational environments, resulting in improved performance, stability, and safety in these environments.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different phospholipid blends, stabilizing agents, or manufacturing units adapted for specific environments. Variations could also include the integration of additional features, such as sensors for monitoring environmental conditions or automated systems for preparing the phospholipid solution formulations.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in various industries, including medical imaging, disaster relief, and environmental monitoring. The target markets include high-security facilities, disaster relief organizations, and remote or resource-limited areas, where the specialized variations and niche solutions provided by the inventive concept can address specific needs and challenges.

CPC Classifications

SectionClassGroup
A A61 A61K49/223
A A61 A61B8/481
A A61 A61K49/226
A A61 A61K49/227
C C07 C07F9/09
C C07 C07F9/106

Field of Art

Medical imaging and pharmaceutical formulation, specifically ultrasound contrast agent preparation, involving advanced lipid chemistry, pharmaceutical engineering, and medical device design. Requires expertise in phospholipid manipulation, microsphere encapsulation, and materials science for medical applications.

Person of Ordinary Skill (PHOSITA) Profile

A skilled practitioner with a Ph.D. or equivalent experience in chemical engineering, pharmaceutical sciences, or biomedical engineering, possessing advanced knowledge of lipid chemistry, microsphere preparation techniques, and medical imaging technologies.

Obviousness Rationale

A PHOSITA would recognize that the PTD's variations represent predictable extensions of the source patent's core methodology, applying standard engineering problem-solving techniques to adapt the phospholipid microsphere preparation for specialized environments. The fundamental chemical principles and preparation methods remain consistent, with the PTD merely introducing contextual modifications that would be apparent to a skilled practitioner seeking to apply the original invention in diverse operational contexts.

Obvious Combinations & Variations

Source Patent Element
Phospholipid blend comprising DPPA, DPPC, and MPEG5000-DPPE with specific divalent metal cation concentrations
PTD Variation
Adapting the phospholipid blend for high-security or extreme environment applications by adding stabilizing agents to prevent precipitation
Obviousness Reasoning
A PHOSITA would recognize that modifying phospholipid stability through known stabilizing techniques represents a predictable solution to environmental challenges, using standard pharmaceutical formulation strategies
Source Patent Element
Method of preparing phospholipid suspension using methanol and toluene
PTD Variation
Introducing portable, battery-powered mixing devices for disaster relief and remote area preparation
Obviousness Reasoning
Adapting laboratory preparation methods to field-deployable equipment is an obvious engineering design choice that follows standard technology transfer principles
Source Patent Element
Phospholipid solution formulation sensitive to divalent metal cation concentrations
PTD Variation
Developing filtration and contamination resistance methods for areas with limited water access
Obviousness Reasoning
Implementing standard water purification and particulate filtration techniques to address environmental contamination represents a routine problem-solving approach for a PHOSITA
Source Patent Element
Basic microsphere encapsulation technique for ultrasound contrast agents
PTD Variation
Creating specialized containers and manufacturing units for secure and controlled preparation environments
Obviousness Reasoning
Designing context-specific containment and preparation systems is a predictable engineering solution that applies standard pharmaceutical manufacturing principles
Source Patent Element
Phospholipid blend composition with specific lipid components
PTD Variation
Introducing temperature and humidity tolerant formulations for extreme environmental conditions
Obviousness Reasoning
Modifying lipid formulations to enhance environmental stability is a standard pharmaceutical engineering approach with predictable optimization strategies
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857646 and the comprehensive variations disclosed herein, a person of ordinary skill in the art would find the claimed innovations obvious and therefore unpatentable. The published technical disclosure demonstrates that the proposed variations represent straightforward adaptations of known phospholipid microsphere preparation techniques, employing standard engineering problem-solving approaches to address specific environmental challenges.

Original Patent Information

Patent NumberUS 11,857,646
TitleMethods for making ultrasound contrast agents
Assignee(s)Lantheus Medical Imaging, Inc.