Patent US3709802A successfully refreshed from Google Patents.
US3709802A
Expired / Lapsed
US
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Liquid food decolorization
Assignee: Kikkoman Corp
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Filing: 1970-03-09
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Granted: 1973-01-09
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Expires: 1990-03-09
Abstract
Abstract A liquid food such as soy sauce, and a fruit juice, is electrolytically reduced in an electrolytic cell comprising an anode isolated from the liquid food by an ion-permeable membrane, at least one metallic net or perforated plate cathode and a vessel for encasing the anode and the cathode by applying a potential between the electrode, while filling the liquid food in the vessel. Melanoidins contained in the liquid food is decolorized thereby.
Inventors
- 👤 A Okuhara
- 👤 T Nakajima
- 👤 N Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/70; A23L2/72; A23L2/74; A23L5/00; A23L5/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
A method according to claim 1, wherein the decolorization is carried out while gently stirring the liquid food.
Claim 2
Dependent Claim
15 words
A method according to claim 1, wherein the cathode zone contains a perforated cathode means.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein the electrolyte solution is an aqueous chloride solution or an organic acid solution.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein the melanoidins containing food is soy sauce.
Claim 5
Dependent Claim
26 words
A method of claim 1, wherein the voltages applied to the individual cathodes are adjusted thereby to obtain uniform current density on surfaces of the cathodes.
Claim 6
Independent Claim
115 words
A method of decolorizing or controlling formation of or elimination of melanoidins in a liquid food selected from group consisting of soy sauce, fruit juices and sake comprising placing said liquid food in an electrolytic cell having an ion-permeable material as a barrier between an anode zone and a cathode zone, the anode being immersed in an anolyte solution and said anode zone being separated from direct contact with the liquid food and the cathode zone containing a plurality of cathodes at a determined distance from the anode, and applying a current to the electrolytic cell for a period of time effective to decolor or control formation of or eliminate melanoidins from said liquid food.
Claim 7
Dependent Claim
46 words
The method of claim 7, wherein the anolyte solution is selected from the group consisting of aqueous chloride solution and aqueous citric acid solution and the anode is a carbon anode and the cathodes are selected from nets or plates of silver, copper, aluminum and iron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |