# US 4,399,161 A · Novel method of storing processed fish and roe

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- Number: US 4,399,161 A
- Document ID: US4399161A
- Status: Granted
- Kind: A
- Application number: 06/234,434
- Filed: 1981-02-13
- Granted: 1983-08-16
- Earliest claimed: 1980-02-15
- Assignees: Mitsubishi Gas Chemical Company, Inc.
- Inventors: Hisao Nakamura; Youji Uchida
- Web page: https://patentgrep.com/patent/US4399161A

## CPC

- A23B 4/033: with addition of chemicals (A23B4/037 takes precedence)
- A23B 4/02: Preserving by means of inorganic salts (apparatus therefor A23B4/26, A23B4/32)
- A23B 4/068: {with packages or with shaping in the form of blocks or portions}
- A23B 4/16: in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- Y02A 40/90: in food processing or handling, e.g. food conservation
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

A method of storing processed fish and processed roe which comprises placing processed fish or processed roe in a gas impermeable packing bag or an airtight container together with an oxygen absorbent and leaving the same to stand at a temperature between -20.degree. and 25.degree. C. is disclosed. This invention permits storage processed fish or processed roe containing little salt, or processed fish or processed roe containing much water.

## Claims

### Claim 1

A method of storing processed fish which comprises placing a fish in a gas impermeable packaging bag or an airtight container together with an oxygen absorbent and storing the same at a temperature between -10.degree. and 10.degree. C., said processed fish having been obtained by immersing fresh fish in brine, splitting the back or belly, or slicing the fish, and then dewatering the fish, said processed fish having a water content of 40 to 80% and a NaCl concentration of 2 to 10%.

### Claim 2 (depends on 1)

A method according to claim 1 wherein the oxygen absorbent is a reducing composition packed in a gas permeable bag, at least part of a material constituting the bag being composed of a material having a gas permeability of 1,000 to 100,000 sec/100 ml air.

### Claim 3 (depends on 2)

A method according to claim 2 wherein the reducing composition contains as a main active component a reducing agent selected from the group consisting of iron powder, reducing inorganic salts, polyphenols, reducing sugars, reducing polyhydric alcohols and mixtures thereof.

### Claim 4 (depends on 2)

A method according to claim 2 wherein the material having a gas permeability of 1,000 to 100,000 sec/100 ml air is a forminate plastic film laminated with a gas permeable sheet selected from paper, cloth, nonwoven fabric or a lamination of two or more thereof.

### Claim 5 (depends on 2)

A method according to claim 2 wherein the material having gas permeability of 1,000 to 100,000 sec/100 ml air is a microporous film.

### Claim 6 (depends on 2)

A method according to claim 2 wherein the material having gas permeability of 1,000 to 100,000 sec/100 ml air is a microporous film laminated with a gas permeable sheet having a softening point that differs from that of the microporous film.

### Claim 7 (depends on 1)

A method according to claim 1 wherein the fish is dehydrated to a water content of 65 to 75%.

### Claim 8 (depends on 1)

A method according to claim 1 wherein the processed fish is stored at a temperature between 0.degree. and 10.degree. C.

### Claim 9 (depends on 1)

A method according to claim 1 wherein the fish is stored at -3.+-.0.5.degree. C.

### Claim 10 (depends on 1)

A method according to claim 1 wherein the gas impermeable packaging bag is made of a plastic film having an oxygen permeability of less than 50 ml/m.sup.2 atm.d.

### Claim 11 (depends on 1)

A method according to claim 1 wherein the processed fish, the oxygen absorbent, and a solid oxygen indicator are placed in a transparent gas impermeable packing bag.

### Claim 12 (depends on 1)

A method according to claim 1 wherein the processed fish is wrapped with a gas permeable material.