US3849201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anode and sensing cell for hydrazine fuel cell
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1972-03-23
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Granted: 1974-11-19
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Expires: 1992-03-23
Abstract
Abstract The disclosure describes a sensing cell which monitors hydrazine concentration in the fuel cell electrolyte by detecting the potential difference between (i) an anode which forms part of a complete circuit including a load and (ii) a reference anode, both anodes being in contact with the electrolyte. Also described is a hydrazine fuel cell which includes the improved anode and/or the sensing cell.
Inventors
- 👤 K Kordesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:43
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/92; H01M8/00; H01M8/04; H01M8/04082; H01M8/04186; H01M8/04194; H01M2004/8678; H01M2004/8684; H01M4/921; H01M8/22; H01M8/222; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
IN COMBINATION WITH A HYDRAZINE FUEL CELL BATTERY COMPRISING AT LEAST ONE HYDRAZINE ANODE, AT LEAST ONE OXIDANT CATHODE AND AN ELECTROLYTE IN CONTACT WITH SAID ANODE AND CATHODE AND CONTAINING DISSOLVED HYDRAZINE; A DEVICE FOR CONTROLLING THE HYDRAZINE CONCENTRATION IN SAID ELECTROLYTE, SAID DEVICE COMPRISING, IN COMBINATION; A SENSING CELL OPERABLY INDEPENDENT FROM SAID FUEL CELL BATTERY, SAID SENSING CELL COMPRISING A FIRST (WORKING) HYDRAZINE ANODE THROUGH WHICH CURRENT FLOWS WHEN SAID DEVICE IS IN OPERATION, A SECOND (REF-
Claim 2
Dependent Claim
80 words
IN COMBINATION WITH A HYDRAZINE FUEL CELL BATTERY COMPRISING AT LEAST ONE HYDRAZINE ANODE, AT LEAST ONE OXIDANT CATHODE AND AN ELECTROLYTE IN CONTACT WITH SAID ANODE AND CATHODE AND CONTAINING DISSOLVED HYDRAZINE; A DEVICE FOR CONTROLLING THE HYDRAZINE CONCENTRATION IN SAID ELECTROLYTE, SAID DEVICE COMPRISING, IN COMBINATION; A SENSING CELL OPERABLY INDEPENDENT FROM SAID FUEL CELL BATTERY, SAID SENSING CELL COMPRISING A FIRST (WORKING) HYDRAZINE ANODE THROUGH WHICH CURRENT FLOWS WHEN SAID DEVICE IS IN OPERATION, A SECOND (REF-
Claim 3
Dependent Claim
52 words
The combination in accordance with claim 1 wherein the first anode in said sensing cell forms a complete electrical circuit with the oxidant cathode and a load resistance, and the current flowing through said first anode is provided by the fuel cell comprising said first anode, said cathode, and said hydrazine-containing electrolyte.
Claim 4
Dependent Claim
29 words
The combination in accordance with claim 1 wherein the current flowing through the first anode of said sensIng cell is provided by a source external to said sensing cell.
Claim 5
Dependent Claim
49 words
The combination in accordance with claim 1 which includes means in circuit with the first anode and the second anode in said sensing cell for eliminating the ohmic resistance component of said fuel cell electrolyte when the potential difference between the first anode and the second anode is measured.
Claim 6
Dependent Claim
41 words
The combination in accordance with claim 1 wherein said hydrazine anodes comprise a porous solid material having deposited thereon a mixture of metals comprising from 5 to 95 weight percent palladium and from 95 to 5 weight percent rhodium and/or platinum.
References Cited (Backward Citations)
US2851654A
Cited
US3291753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |