US3793081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfided transition metal fuel cell cathode catalysts
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1971-04-28
•
Granted: 1974-02-19
•
Expires: 1991-04-28
Abstract
Abstract An improved electrochemical cell has an acid electrolyte and a catalytic amount of at least one acid insoluble sulfide of a transition metal in the cathode. The preferred cathode catalyst is a mixture of a transition metal disulfide and thio spinel.
Inventors
- 👤 G Varga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
12 words
The fuel cell of claim 1 wherein said transition metal is cobalt.
Claim 2
Dependent Claim
58 words
In the method of generating electric power in a fuel cell by electrochemically reacting a fuel and an oxidant at the anode and cathode, the improvement which comprises in combination supplying an acid electrolyte to said cell and providing said cathode with at least a catalytic amount of a disulfide and thio spinel of the same transition metal.
Claim 3
Dependent Claim
17 words
The method of claim 3 wherein said cathode is provided with a disulfide of a transition metal.
Claim 4
Dependent Claim
11 words
The method of claim 3 wherein the transition metal is cobalt.
References Cited (Backward Citations)
US2770527A
Cited
GB900451A
Cited
DE1250792B
Cited
US3160528A
Cited
US3528857A
Cited
US3480479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |