US4255498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Button-type air cell
Assignee: Toshiba Ray O Vac Co Ltd
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Filing: 1979-10-26
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Granted: 1981-03-10
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Expires: 1999-10-26
Abstract
Abstract A button-type air cell which comprises: an air cathode prepared by adding a binder to carbon powders mixed with metal chelates; viscous gelled electrolyte set in contact with said air cathode; and wherein the metal chelates include metal phthalocyanines and metal porphyrins; and the metal atom of the metal chelates is symmetrically surrounded by four nitrogen atoms, said metal being cobalt, iron, nickel, manganese or copper.
Inventors
- 👤 Kazumasa Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:51
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M12/00; H01M12/04; H01M12/06; H01M4/96
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
An improved button-type air cell comprising an anode, an air cathode, and a viscous gelled electrolyte interposed between and in contact with said anode and said air cathode, the improvement comprising said air cathode comprising a binder containing powdered carbon particles mixed with a metal chelate, said metal chelate being selected from the group consisting of metal phthalocyanines and metal porphyrins wherein the said metal atom is selected from the group consisting of cobalt, iron, nickel, manganese and copper and is symmetrically surrounded by four nitrogen atoms, said metal chelates containing from one to four groups of the formula --SO 3 X wherein X is selected from the group consisting of hydrogen, sodium, potassium, lithium and ammonium.
Claim 2
Dependent Claim
117 words
An improved button-type air cell comprising an anode, an air cathode, and a viscous gelled electrolyte interposed between and in contact with said anode and said air cathode, the improvement comprising said air cathode comprising a binder containing powdered carbon particles mixed with a metal chelate, said metal chelate being selected from the group consisting of metal phthalocyanines and metal porphyrins wherein the said metal atom is selected from the group consisting of cobalt, iron, nickel, manganese and copper and is symmetrically surrounded by four nitrogen atoms, said metal chelates containing from one to four groups of the formula --SO 3 X wherein X is selected from the group consisting of hydrogen, sodium, potassium, lithium and ammonium.
Claim 3
Dependent Claim
14 words
The air cell according to claim 1, wherein said metal chelates are metal phthalocyanines.
Claim 4
Dependent Claim
14 words
The air cell according to claim 1, wherein said metal chelates are metal porphyrins.
Claim 5
Dependent Claim
21 words
The air cell according to claim 1, wherein said air chathode also contains an additive having a nobler potential than oxygen.
Claim 6
Dependent Claim
18 words
The air cell according to claim 4, wherein said additive is manganese dioxide, nickel oxyhydroxide or silver oxide.
Claim 7
Dependent Claim
27 words
The air cell according to claim 1, wherein the mixture of carbon powders and metal chelates is heat treated at a temperature of 150° to 1,300° C.
Claim 8
Dependent Claim
26 words
The air cell according to claim 6, wherein said heat treatment is carried out in an atmosphere of inert gas or reducing gas or in vacuum.
Claim 9
Dependent Claim
22 words
The air cell according to claim 7, wherein the electrolyte is chosen to have a viscosity ranging between 200 and 20,000 centipoises.
Claim 10
Dependent Claim
22 words
The air cell according to claim 1, wherein the electrolyte is chosen to have a viscosity ranging between 200 and 20,000 centipoises.
Claim 11
Dependent Claim
23 words
The air cell according to any one of claims 1, 5, 6, 7, 8 or 9, wherein said metal chelate is cobalt phthalocyanine.
Claim 12
Dependent Claim
28 words
The air cell according to any one of claims 1, 5, 6, 7, 8 or 9, wherein said metal chelate is cobalt tetramethoxyphenyl porphyrin or cobalt tetraphenyl porphyrin.
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |