Microcapsule-based Antimicrobial Systems for Diverse Industries

Publication ID: 24-11857659_0002_PTD
Published: October 28, 2025
Category:New Applications & Use Cases

Legal Citation

pr1or.art Inc., “Microcapsule-based Antimicrobial Systems for Diverse Industries,” Published Technical Disclosure No. 24-11857659_0002_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857659_0002_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. 11,857,659.

Summary of the Inventive Concept

The inventive concept leverages microcapsules with oil-based cores and polymeric shells coated with cationic polymers to release antimicrobial agents, expanding their application to various industries beyond personal care, including food preservation, agricultural spoilage reduction, surface sanitizing, medical implant surface treatment, and waste management odor control.

Background and Problem Solved

The original patent focused on rinse-off conditioner compositions for hair care. However, the microcapsule technology has broader potential. The inventive concept addresses the limitations of existing antimicrobial solutions in various industries, offering a novel, effective, and controlled release mechanism to combat microbial growth, spoilage, and odors.

Detailed Description of the Inventive Concept

The microcapsules, comprising an oil-based core and a polymeric shell coated with at least one cationic polymer, are designed to release antimicrobial agents in response to specific triggers or conditions. The system can be tailored to different industries by adjusting the type and amount of antimicrobial agents, the microcapsule size and shell composition, and the release mechanism. For instance, in food preservation, the microcapsules can be incorporated into packaging materials or coatings to extend shelf life. In agricultural applications, the rinse-off conditioner composition can be applied to crops to prevent microbial growth and reduce spoilage.

Novelty and Inventive Step

The inventive concept's novelty lies in the application of microcapsule technology to diverse industries, leveraging the controlled release of antimicrobial agents to address specific problems. The inventive step resides in the recognition of the microcapsules' potential beyond personal care and the development of tailored systems for various industries.

Alternative Embodiments and Variations

Alternative embodiments may include microcapsules with different core compositions, shell materials, or cationic polymer coatings. Variations could involve using the microcapsules in combination with other antimicrobial agents or incorporating them into different types of products, such as textiles or medical devices.

Potential Commercial Applications and Market

The inventive concept has significant commercial potential in various industries, including food processing, agriculture, healthcare, and waste management. The market for antimicrobial solutions is substantial, and the microcapsule-based systems offer a unique value proposition, enabling controlled release, targeted delivery, and improved efficacy.

CPC Classifications

SectionClassGroup
A A61 A61K8/416
A A61 A61K8/11
A A61 A61K8/31
A A61 A61K8/342
A A61 A61K8/361
A A61 A61K8/737
A A61 A61K8/88
A A61 A61K8/898
A A61 A61K8/922
A A61 A61K8/927
A A61 A61Q5/02
A A61 A61Q5/12
A A61 A61Q19/007
A A61 A61K2800/33
A A61 A61K2800/412
A A61 A61K2800/5426
A A61 A61K2800/624

Field of Art

Personal care chemistry, specifically formulation of rinse-off conditioner compositions with microcapsule technologies, encompassing polymer chemistry, surface engineering, and controlled release systems

Person of Ordinary Skill (PHOSITA) Profile

A chemist with expertise in cosmetic formulations, polymer science, and microcapsule technologies, holding at least a master's degree with 3-5 years of industrial experience in developing advanced personal care and specialty chemical systems

Obviousness Rationale

A PHOSITA would recognize that the core microcapsule technology disclosed in US 11857659 has inherent versatility for cross-industry applications beyond personal care. The fundamental structural elements of oil-based cores with polymeric cationic shells represent a flexible platform technology that can be readily adapted to alternative use cases with predictable results in controlled release systems.

Obvious Combinations & Variations

Source Patent Element
Microcapsules with oil-based core and polymeric shell coated with cationic polymers
PTD Variation
Extending microcapsule technology to food preservation and agricultural applications
Obviousness Reasoning
Known controlled release mechanisms make adaptation to preservation contexts a predictable design choice using standard encapsulation engineering principles
Source Patent Element
Rinse-off conditioner composition with quaternary ammonium salt components
PTD Variation
Incorporating antimicrobial release mechanisms for surface sanitization
Obviousness Reasoning
Quaternary ammonium salts are well-established antimicrobial agents, and their incorporation into microcapsule systems represents a straightforward technical adaptation
Source Patent Element
Polymeric shell coating techniques for microcapsules
PTD Variation
Applying microcapsule technology to medical implant surface treatments
Obviousness Reasoning
Controlled release systems are a known approach in medical device engineering, making the translation of personal care microcapsule technology to medical contexts an obvious technical extension
Source Patent Element
Composition containing oil-based microcapsule slurry
PTD Variation
Using microcapsules for odor management in waste systems
Obviousness Reasoning
Fragrance encapsulation and controlled release are standard techniques in chemical engineering, representing a predictable application of the core microcapsule technology
35 U.S.C. § 103 Summary: Based on the teachings of US 11857659, a person of ordinary skill would find the variations disclosed herein obvious, as the fundamental microcapsule technology represents a versatile platform readily adaptable to multiple industrial contexts through routine engineering modifications that would yield predictable results in controlled release systems.

Original Patent Information

Patent NumberUS 11,857,659
TitleRinse-off conditioner compositions comprising microcapsules
Assignee(s)FIRMENICH SA