Live Fish Egg Stabilization for Preservative-Free Caviar

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Solution Overview

Problem

Current methods for producing caviar and caviar-like products from fish and crustaceans often involve killing the animals, using high concentrations of preservatives that kill or damage the eggs, or relying on immature eggs that are soft and require additional processing to achieve stability, leading to quality issues and environmental concerns.

Innovation Solution

A method involving the use of a saline solution followed by a potassium and optionally calcium treatment at physiological concentrations to stabilize the egg envelope of live, mature, fertile eggs, forming a new elastic layer without altering the natural potassium content, allowing for caviar production without preservatives and maintaining egg quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If high concentrations of preservatives are used to stabilize eggs, then egg stability is improved, but egg quality and natural composition are worsened

Engineering Contradiction:

Improveegg stabilityVSAvoidpreservative damage

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent applies parameter changes by using physiological concentrations of potassium and calcium ions (matching natural egg composition) rather than high concentrations of preservatives. This changes the chemical parameters to stabilize the egg envelope while maintaining natural quality, avoiding the harmful effects of excessive preservatives.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the natural potassium content in eggs (which is often overlooked or considered a limitation) into a beneficial feature. By using physiological potassium concentrations already present in the eggs, the method stabilizes the egg envelope without introducing harmful external preservatives, turning a potential weakness into a strength.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Productivity

If immature eggs are used for caviar production, then production availability is improved, but egg firmness and stability are worsened

Engineering Contradiction:

Improveproduction availabilityVSAvoidegg firmness

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The patent uses parameter changes by treating immature eggs with physiological concentrations of potassium and calcium ions, which stabilizes the egg envelope and increases firmness. This allows the use of immature eggs (improving productivity) while overcoming their inherent softness through controlled chemical treatment.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies preliminary action by treating the eggs with potassium and calcium ion solutions before final processing. This preliminary stabilization treatment strengthens the egg envelope in advance, allowing immature eggs to be used while ensuring they achieve the necessary firmness for caviar production.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If conventional caviar extraction methods are used, then extraction efficiency is improved, but animal welfare and environmental impact are worsened

Engineering Contradiction:

Improveextraction efficiencyVSAvoidanimal harm

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the limitation of live egg extraction (lower extraction efficiency) into a benefit by using physiological ion treatments that stabilize eggs without requiring killing or harsh chemicals. This approach maintains animal welfare while achieving sufficient extraction efficiency through gentle, natural-based methods.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Produces high-quality caviar with enhanced stability and freshness, extending shelf life to 9-12 months without preservatives, and enabling freezing without quality loss, while being environmentally friendly and respectful of the animals.

Implementation Method 1

treating the live, mature eggs in a solution of water and potassium in a concentration which does not damage the live, mature eggs and does not change the eggs' potassium content

Methodology Applied

Scientific EffectIon treatment:

Implementation Method 2

an elastic stabilizing layer is present in the egg envelope between the zona radiata interna and the alveolar layer

Methodology Applied

Scientific EffectElastic stabilization: Elasticity

Data Source

PatentUS20260026532A1Method for producing caviar or a caviar-like product from live mature eggs of fish or crustaceans

Publication Date: 2026.01.29 ALFRED WEGENER INST HELMHOLTZ ZENT FUR POLAR & MEERESFORSCHUNG

AI summary

A caviar or caviar-like product from live, mature, and ovulated eggs of bony fish or crustaceans, wherein the live, mature, and ovulated eggs are in a fertile but unfertilized state, have a natural potassium content in the egg plasma, and include an egg envelope having three or more layers, wherein the egg envelope comprises a zona radiata interna, a zona radiata externa and an alveolar layer, and wherein an elastic stabilizing layer is present in the egg envelope between the zona radiata interna and the alveolar layer.