US3378403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for regenerating a fuel cell electrolyte by electrodialysis and removing excess water
Assignee: Siemens AG
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Filing: 1962-09-19
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Granted: 1968-04-16
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Expires: 1982-09-19
Abstract
No abstract record available.
Inventors
- 👤 Nils V Waubke
- 👤 Justi Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0693; H01M8/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF REMOVING EXCESS WATER FROM AN ELECTROLYTE CONTAINED IN THE ELECTRODE CHAMBER OF A FUEL CELL, SAID ELECTROLYTE CONSISTING OF AN AQUEOUS ALKALI METAL SOLUTION AND SAID EXCESS WATER BEING FORMED BY THE ELECTROCHEMICAL REACTION OF A HYDROGEN-CONTAINING FUEL IN THE ELECTRODE CHAMBER, COMPRISING THE STEPS OF PLACING AN ELECTRODIALYSIS CHAMBER IN COMMUNICATION WITH SAID ELECTRODE CHAMBER, SAID ELECTRODIALYSIS CHAMBER INCLUDING AN ANODE COMPARTMENT, SEPARATING SAID ANODE COMPARTMENT FROM SAID ELECTROLYTE IN SAID ELECTRODE CHAMBER BY A CATION EXCHANGER MEMBRANE, CONTINUOUSLY CIRCULATING A CARBONATE SOLUTION OF SAID ALKALI METAL THROUGH THE ANODE COMPARTMENT, TRANSFERRING ALKALI METAL CATIONS FROM SAID CARBONATE SOLUTION THROUGH THE MEMBRANE INTO THE ELECTROLYTE BY ELECTRODIALYSIS, TRANSFERRING EXCESS ELECTROLYTE DILUTED BY THE WATER FORMED IN SAID REACTION TO THE CONTINUOUSLY CIRCULATING CARBONATE SOLUTION, CONTINOUSLY SEPARATING A PORTION OF THE WATER FROM SAID SOLUTION AND REMOVING SAID PORTION OF WATER.
Claim 2
Independent Claim
144 words
A METHOD OF REMOVING EXCESS WATER FROM AN ELECTROLYTE CONTAINED IN THE ELECTRODE CHAMBER OF A FUEL CELL, SAID ELECTROLYTE CONSISTING OF AN AQUEOUS ALKALI METAL SOLUTION AND SAID EXCESS WATER BEING FORMED BY THE ELECTROCHEMICAL REACTION OF A HYDROGEN-CONTAINING FUEL IN THE ELECTRODE CHAMBER, COMPRISING THE STEPS OF PLACING AN ELECTRODIALYSIS CHAMBER IN COMMUNICATION WITH SAID ELECTRODE CHAMBER, SAID ELECTRODIALYSIS CHAMBER INCLUDING AN ANODE COMPARTMENT, SEPARATING SAID ANODE COMPARTMENT FROM SAID ELECTROLYTE IN SAID ELECTRODE CHAMBER BY A CATION EXCHANGER MEMBRANE, CONTINUOUSLY CIRCULATING A CARBONATE SOLUTION OF SAID ALKALI METAL THROUGH THE ANODE COMPARTMENT, TRANSFERRING ALKALI METAL CATIONS FROM SAID CARBONATE SOLUTION THROUGH THE MEMBRANE INTO THE ELECTROLYTE BY ELECTRODIALYSIS, TRANSFERRING EXCESS ELECTROLYTE DILUTED BY THE WATER FORMED IN SAID REACTION TO THE CONTINUOUSLY CIRCULATING CARBONATE SOLUTION, CONTINOUSLY SEPARATING A PORTION OF THE WATER FROM SAID SOLUTION AND REMOVING SAID PORTION OF WATER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |