Published Technical Disclosure Archive

Stevia Rebaudioside A Solubility Enhancement Method

Publication ID: 24-11856974_0001_PTD
Published: October 26, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Stevia Rebaudioside A Solubility Enhancement Method,” Published Technical Disclosure No. 24-11856974_0001_PTD, Published October 26, 2025, available at https://archive.pr1or.art/24-11856974_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. 11,856,974.

Background and Problem Solved

The original patent disclosed a process for preparing highly soluble individual or combined sweet glycosides from a Stevia rebaudiana Bertoni plant extract, but the solubility of Rebaudioside A remains a significant limitation. The new invention addresses this limitation by introducing novel methods and systems to increase the solubility of Rebaudioside A, making it more efficient and commercially viable.

Novelty and Inventive Step

The new invention introduces novel methods and systems to increase the solubility of Rebaudioside A, including temperature control, ultrasonic energy, and solubility-enhancing agents, which are not disclosed in the original patent. The inventive step lies in the combination of these methods and systems to achieve improved solubility and commercial viability.

Alternative Embodiments and Variations

Other embodiments of the invention may include using different solvents, varying the ratio of solvent to crystalline Rebaudioside A powder, or incorporating additional steps to further enhance solubility. The system and method can also be adapted for use with other sweet glycosides or plant extracts.

Potential Commercial Applications and Market

The invention has significant commercial potential in the food and beverage industry, particularly in the production of low-calorie sweeteners and sugar substitutes. The improved solubility and efficiency of the system and method make it an attractive solution for manufacturers and consumers alike.

CPC Classifications

SectionClassGroup
A A23 A23L27/33
A A23 A23G3/36
A A23 A23G9/32
A A23 A23L2/60
A A23 A23L27/00
A A23 A23L27/10
A A23 A23L27/11
A A23 A23L27/12
A A23 A23L27/30
A A23 A23L27/31
A A23 A23L27/34
A A23 A23L27/35
A A23 A23L27/36
A A23 A23L27/37
A A23 A23L33/21
A A61 A61K8/602
A A61 A61K8/9789
A A61 A61K36/28
A A61 A61Q19/00
A A23 A23L27/21
A A23 A23V2002/00
A A61 A61K2800/10
A A61 A61K2800/92

Field of Art

Food Science and Chemical Engineering, specifically focused on extraction, processing, and modification of plant-based sweeteners, with expertise in solubility enhancement techniques for glycoside compounds

Person of Ordinary Skill (PHOSITA) Profile

A professional with advanced degree in food science or chemical engineering, experienced in plant extract processing, familiar with solubility modification techniques, and knowledgeable about stevia glycoside characteristics

Obviousness Rationale

A person skilled in the art would recognize that the PTD's variations represent predictable engineering solutions to enhance Rebaudioside A solubility. The disclosed methods of temperature control, ultrasonic energy application, and solubility-enhancing agents are standard techniques in food processing and chemical engineering for improving compound solubility. These variations would be considered routine optimization of the original patent's fundamental process.

Obvious Combinations & Variations

Source Patent Element
Crystalline Rebaudioside A powder dissolved in water at 1:1 ratio
PTD Variation
Adding temperature control above 50°C to increase solubility
Obviousness Reasoning
Heating is a known, predictable method for increasing solute solubility, representing a standard engineering approach to dissolution that would be obvious to a skilled practitioner
Source Patent Element
Basic water-based dissolution process for Rebaudioside A
PTD Variation
Applying ultrasonic energy during mixing to enhance dissolution
Obviousness Reasoning
Ultrasonic energy is a recognized technique for improving particle dispersion and dissolution rates, representing a finite and predictable solution for enhancing solubility
Source Patent Element
Water-based solvent system for Rebaudioside A
PTD Variation
Incorporating solubility-enhancing agents to improve dissolution characteristics
Obviousness Reasoning
Adding solubility agents is a standard formulation technique with predictable results, involving well-known chemical engineering principles for modifying compound interactions
Source Patent Element
Crystalline Rebaudioside A powder
PTD Variation
Converting to amorphous form with increased room temperature solubility
Obviousness Reasoning
Polymorphic transformation is a known method for improving solubility, representing a finite set of predictable modifications within materials science
Source Patent Element
Basic dissolution process
PTD Variation
Using spray drying to produce high-solubility powder formulation
Obviousness Reasoning
Spray drying is a standard industrial technique for producing fine, highly soluble powders, representing a predictable engineering solution for powder processing
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. § 103, the variations disclosed in this publication would be considered obvious to a person having ordinary skill in the art at the time of invention, when viewed in light of US Patent 11856974. The disclosed methods represent routine optimization and combination of known techniques for enhancing Rebaudioside A solubility, employing standard engineering approaches that would be apparent to a skilled practitioner in food science and chemical processing.

Original Patent Information

Patent NumberUS 11,856,974
TitleHighly soluble stevia sweetener
Assignee(s)PURECIRCLE SDN BHD