pHLIP-based Liposome Technology for Agricultural Applications

Publication ID: 24-11857509_0007_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “pHLIP-based Liposome Technology for Agricultural Applications,” Published Technical Disclosure No. 24-11857509_0007_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857509_0007_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. 11,857,509.

Summary of the Inventive Concept

The inventive concept leverages the pH-sensitive liposome technology from the original patent to develop novel agricultural applications, including targeted delivery of nutrients, monitoring soil acidity, treating fungal infections, detecting soil-borne diseases, and enhancing plant growth in acidic soils.

Background and Problem Solved

Despite advances in agricultural technology, farmers still face significant challenges in optimizing crop yields and managing soil health. The original patent's pH-sensitive liposome technology, initially designed for cancer treatment, can be repurposed to address these agricultural challenges. The new inventive concept solves the problem of inefficient nutrient delivery, inaccurate soil acidity monitoring, and ineffective fungal infection treatment in plants.

Detailed Description of the Inventive Concept

The pHLIP-based liposome technology is adapted for agricultural applications by loading the liposomes with nutrients, antifungal agents, or detectable markers. The pH-sensitive liposomes selectively release their payloads in response to low pH conditions, ensuring targeted delivery to plant cells or fungal infections. This technology enables precise monitoring of soil acidity levels, detection of soil-borne diseases, and enhanced plant growth in acidic soils.

Novelty and Inventive Step

The new claims introduce a novel application of the pH-sensitive liposome technology in the agricultural sector, which is non-obvious and distinct from the original patent's cancer treatment focus. The inventive step lies in the adaptation of the core technology to address specific agricultural challenges, demonstrating a significant expansion of the technology's potential.

Alternative Embodiments and Variations

Alternative embodiments could include using different types of liposomes, varying the pH sensitivity range, or incorporating additional molecules to enhance the technology's effectiveness. Variations could also involve applying the technology to other agricultural areas, such as livestock health or environmental monitoring.

Potential Commercial Applications and Market

The pHLIP-based liposome technology for agricultural applications has significant commercial potential in the agricultural industry, with potential markets including precision agriculture, crop protection, and soil health management. The technology could be licensed to agricultural companies, or developed into a standalone product or service offering.

CPC Classifications

SectionClassGroup
A A61 A61K9/1271
A A61 A61K9/127
A A61 A61K31/20
A A61 A61K31/337
A A61 A61K31/704
A A61 A61K31/711
A A61 A61K31/713
A A61 A61K31/7105
A A61 A61K47/6911
A A61 A61P35/00

Field of Art

Pharmaceutical and Agricultural Biotechnology, focusing on targeted molecular delivery systems, particularly liposome-based technologies for cellular targeting and payload delivery

Person of Ordinary Skill (PHOSITA) Profile

A skilled practitioner with advanced degrees in biotechnology, biochemistry, or pharmaceutical sciences, possessing expertise in liposome design, peptide engineering, and targeted drug/nutrient delivery mechanisms

Obviousness Rationale

A PHOSITA would recognize the fundamental similarity between the source patent's pH-sensitive liposome delivery mechanism and the agricultural application disclosed in the PTD. The core technological principle of pH-triggered molecular delivery remains consistent, with the primary innovation being the shift from medical to agricultural contexts. The adaptability of liposome technology across different domains suggests that extending the pHLIP-based delivery system to agricultural applications would be a predictable and obvious variation.

Obvious Combinations & Variations

Source Patent Element
pH-sensitive liposomes with pHLIP polypeptides for targeted cellular delivery
PTD Variation
Adapting the liposome delivery system to agricultural nutrient and treatment applications
Obviousness Reasoning
Known technique of repurposing drug delivery technologies for alternative domains, with predictable results in targeted molecular transport
Source Patent Element
Cellular membrane fusion and selective cargo release mechanisms
PTD Variation
Applying membrane fusion principles to plant cell and fungal cell targeting
Obviousness Reasoning
Predictable extension of cellular targeting principles across biological systems, representing a routine design choice for a skilled practitioner
Source Patent Element
pH-triggered molecular release in low pH environments
PTD Variation
Using pH sensitivity for soil condition monitoring and disease detection
Obviousness Reasoning
Obvious application of existing sensing mechanism to environmental diagnostic purposes, representing a straightforward technological adaptation
Source Patent Element
Cargo-loaded liposome delivery mechanism
PTD Variation
Loading liposomes with agricultural nutrients, growth promoters, and antifungal agents
Obviousness Reasoning
Routine modification of payload based on established delivery platform, representing a predictable variation within known technological parameters
Source Patent Element
Selective targeting of specific cellular environments
PTD Variation
Targeting plant cells and fungal cells in acidic soil conditions
Obviousness Reasoning
Logical extension of targeted delivery principles to alternative biological contexts, demonstrating a known technique of technological adaptation
35 U.S.C. § 103 Summary: Based on US Patent 11857509's disclosure of pH-sensitive liposome delivery mechanisms, the present publication demonstrates that variations applying such technologies to agricultural contexts would be obvious to a person having ordinary skill in the art. The fundamental principles of pH-triggered molecular delivery remain consistent across the medical and agricultural domains, rendering subsequent claims of non-obviousness unpersuasive.

Original Patent Information

Patent NumberUS 11,857,509
TitleLiposome compositions and methods of use thereof
Assignee(s)Yale University, University of Rhode Island Board of Trustees